@inproceedings{Wolff2006, author = {Wolff, Ulrich}, title = {Die richtige Weiterbildung f{\"u}r den systematischen Kompetenzaufbau}, doi = {10.25643/bauhaus-universitaet.848}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8480}, year = {2006}, subject = {Weimar / Bauhaus-Universit{\"a}t / Professur Baubetrieb und Bauverfahren}, language = {de} } @article{BimberGrundhoeferZollmannetal.2006, author = {Bimber, Oliver and Grundh{\"o}fer, Anselm and Zollmann, Stefanie and Kolster, Daniel}, title = {Digital Illumination for Augmented Studios}, doi = {10.25643/bauhaus-universitaet.857}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8576}, year = {2006}, abstract = {Virtual studio technology plays an important role for modern television productions. Blue-screen matting is a common technique for integrating real actors or moderators into computer generated sceneries. Augmented reality offers the possibility to mix real and virtual in a more general context. This article proposes a new technological approach for combining real studio content with computergenerated information. Digital light projection allows a controlled spatial, temporal, chrominance and luminance modulation of illumination - opening new possibilities for TV studios.}, subject = {Studiotechnik}, language = {en} } @inproceedings{SpiekermannDonath, author = {Spiekermann, Christoph and Donath, Dirk}, title = {DIGITAL SUPPORT OF MATERIAL- AND PRODUCT SELECTION IN THE ARCHITECTURAL DESIGN- AND PLANNING PROCESS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3023}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30235}, pages = {10}, abstract = {Architecture is predominantly perceived over the surfaces limiting the space. The used surface materials thereby should support the design intention and have to fulfil various technical and economical requirements. If the architect wants to select the "right" or the "best" material he has to play with very different and sometimes contradicting criteria and must weight these individually for the special purpose. This selection process is supported only insufficiently by today's digital systems. If it would be possible to illustrate all the various parameters by numerical values, the method of multidimensional scaling will offer a solution for architects to find the material which is best fitting on basis of his individual weighting of criteria. By displaying the result of the architect's multidimensional query in a spatial arrangement multidimensional scaling can support an interactive selection process with additional feedback over the applied search strategy.}, subject = {Architektur }, language = {en} } @inproceedings{UngerKoenke, author = {Unger, J{\"o}rg F. and K{\"o}nke, Carsten}, title = {DISCRETE CRACK SIMULATION OF CONCRETE USING THE EXTENDED FINITE ELEMENTMETHOD}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3030}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30303}, pages = {12}, abstract = {The extended finite element method (XFEM) offers an elegant tool to model material discontinuities and cracks within a regular mesh, so that the element edges do not necessarily coincide with the discontinuities. This allows the modeling of propagating cracks without the requirement to adapt the mesh incrementally. Using a regular mesh offers the advantage, that simple refinement strategies based on the quadtree data structure can be used to refine the mesh in regions, that require a high mesh density. An additional benefit of the XFEM is, that the transmission of cohesive forces through a crack can be modeled in a straightforward way without introducing additional interface elements. Finally different criteria for the determination of the crack propagation angle are investigated and applied to numerical tests of cracked concrete specimens, which are compared with experimental results.}, subject = {Architektur }, language = {en} } @inproceedings{ZolotovAkimovSidorov, author = {Zolotov, Alexander B. and Akimov, Pavel and Sidorov, Vladimir}, title = {DISCRETE-CONTINUAL BOUNDARY ELEMENT METHODS OF ANALYSIS FOR TWO-DIMENSIONAL AND THREE-DIMENSIONAL STRUCTURES}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3041}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30419}, pages = {22}, abstract = {The aim of this paper is to present so-called discrete-continual boundary element method (DCBEM) of structural analysis. Its field of application comprises buildings constructions, structures and also parts and components for the residential, commercial and un-inhabitant structures with invariability of physical and geometrical parameters in some dimensions. We should mention here in particular such objects as beams, thin-walled bars, strip foundations, plates, shells, deep beams, high-rise buildings, extensional buildings, pipelines, rails, dams and others. DCBEM comes under group of semianalytical methods. Semianalytical formulations are contemporary mathematical models which currently becoming available for realization due to substantial speed-up of computer productivity. DCBEM is based on the theory of the pseudodifferential boundary equations. Corresponding pseudodifferential operators are discretely approximated using Fourier analysis or wavelet analysis. The main DCBEM advantages against the other methods of the numerical analysis is a double reduction in dimension of the problem (discrete numerical division applied not to the full region of the interest but only to the boundary of the region cross section, as a matter of fact one is solving an one-dimensional problem with the finite step on the boundary area of the region), one has opportunities to carrying out very detailed analysis of the specific chosen zones, simplified initial data preparation, simplistic and adaptive algorithms. There are two methods to define and conduct DCBEM analysis developed - indirect (IDCBEM) and direct (DDCBEM), thus indirect like in boundary element method (BEM) applied and used little bit more than direct.}, subject = {Architektur }, language = {en} } @inproceedings{DeaconvanRooyen, author = {Deacon, Michael-John and van Rooyen, G.C.}, title = {DISTRIBUTED COLLABORATION: ENGINEERING PRACTICE REQUIREMENTS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2941}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29410}, pages = {8}, abstract = {Designing a structure follows a pattern of creating a structural design concept, executing a finite element analysis and developing a design model. A project was undertaken to create computer support for executing these tasks within a collaborative environment. This study focuses on developing a software architecture that integrates the various structural design aspects into a seamless functional collaboratory that satisfies engineering practice requirements. The collaboratory is to support both homogeneous collaboration i.e. between users operating on the same model and heterogeneous collaboration i.e. between users operating on different model types. Collaboration can take place synchronously or asynchronously, and the information exchange is done either at the granularity of objects or at the granularity of models. The objective is to determine from practicing engineers which configurations they regard as best and what features are essential for working in a collaborative environment. Based on the suggestions of these engineers a specification of a collaboration configuration that satisfies engineering practice requirements will be developed.}, subject = {Architektur }, language = {en} } @misc{Wehner2006, type = {Master Thesis}, author = {Wehner, Diana}, title = {Dynamische Analyse der Dreiturmanlage der St. Severikirche in Erfurt}, doi = {10.25643/bauhaus-universitaet.741}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7410}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {Im Zusammenhang mit der gegenw{\"a}rtigen Zustandsbewertung und geplanten Sanierung der Dreiturmanlage der St. Severikirche in Erfurt wird eine dynamische Analyse unter Glockenl{\"a}uten mit Hilfe eines Finite-Elemente-Modells durchgef{\"u}hrt. Mit diesem unter Verwendung des Programms SLang erstellten FE-Modell wird das Schwingungsverhalten der Dreiturmanlage nachgebildet. Dabei dient als Grundlage die zuvor erfolgte Schwingungsmessung. Mit dem angepassten Modell werden schwingungsreduzierende Maßnahmen hinsichtlich ihrer Wirksamkeit untersucht und bewertet. Weiterhin wird an Ersatzsystemen die aktive Schwingungsisolierung mittels Glockenstuhlunterkonstruktion und der Einbau eines passiven Tilgerd{\"a}mpfers betrachtet.}, subject = {Dynamische Analyse}, language = {de} } @inproceedings{EygelaarvanRooyen, author = {Eygelaar, Anton and van Rooyen, G.C.}, title = {ENGINEERING PROCESS MODEL SPECIFICATION AND RESOURCE LEVELING}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2952}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29529}, pages = {18}, abstract = {The use of process models in the analysis, optimization and simulation of processes has proven to be extremely beneficial in the instances where they could be applied appropriately. However, the Architecture/Engineering/Construction (AEC) industries present unique challenges that complicate the modeling of their processes. A simple Engineering process model, based on the specification of Tasks, Datasets, Persons and Tools, and certain relations between them, have been developed, and its advantages over conventional techniques have been illustrated. Graph theory is used as the mathematical foundation mapping Tasks, Datasets, Persons and Tools to vertices and the relations between them to edges forming a directed graph. The acceptance of process modeling in AEC industries not only depends on the results it can provide, but the ease at which these results can be attained. Specifying a complex AEC process model is a dynamic exercise that is characterized by many modifications over the process model's lifespan. This article looks at reducing specification complexity, reducing the probability for erroneous input and allowing consistent model modification. Furthermore, the problem of resource leveling is discussed. Engineering projects are often executed with limited resources and determining the impact of such restrictions on the sequence of Tasks is important. Resource Leveling concerns itself with these restrictions caused by limited resources. This article looks at using Task shifting strategies to find a near-optimal sequence of Tasks that guarantees consistent Dataset evolution while resolving resource restrictions.}, subject = {Architektur }, language = {en} } @misc{Fuss2006, type = {Master Thesis}, author = {Fuß, Michael}, title = {Erstellung eines geeigneten Web-Content Management-Systems zugeschnitten auf die Anforderungen der Internetpr{\"a}sentation von Lehr- und Forschungseinrichtungen.}, doi = {10.25643/bauhaus-universitaet.743}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7436}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {Die heute erh{\"a}ltlichen Web-Content Management-Systeme (WCMS) verf{\"u}gen {\"u}ber ein umfangreiches und breit gef{\"a}chertes Angebot an Funktionen, die weit {\"u}ber die, zur Redaktion und zum Management von Internetpr{\"a}sentationen, not-wendigen Grundanforderungen hinausgehen. Das macht diese Systeme in ih-ren Einsatz sehr flexibel und deckt vielf{\"a}ltige Anforderungen der Endanwender ab. Andererseits steigt durch die dadurch bedingte Komplexit{\"a}t der Arbeitsauf-wand erheblich und die Bedien- und Benutzerfreundlichkeit sinkt. Gerade f{\"u}r kleinere Internetpr{\"a}sentationen, die ohne aufwendige Interaktionsm{\"o}glichkeiten aber auf h{\"a}ufig wechselndem Informationsangeboten aufwarten, w{\"a}re dies in seiner Grundfunktionalit{\"a}t reduziertes System vorteilhaft. Ein solches reduziertes Web-Content Management-System soll w{\"a}hrend der Diplomarbeit entworfen und beispielhaft implementiert werden. Als Ausgangs- und Orientierungspunkt soll hierzu die Internetpr{\"a}sentation der Professur Informations- und Wissensverarbeitung dienen. Zur softwaretechnischen Umsetzung sind PHP und MySQL in Verbindung mit regul{\"a}ren HTML und CSS zu be-nutzen. F{\"u}r das weitere Vorgehen m{\"u}ssen zun{\"a}chst die Struktur und der Aufbau der Internetpr{\"a}sentation der Professur analysiert, strukturiert und formalisiert werden. Anschließend sind die am h{\"a}ufigsten professionell genutzten Webcontent-Managementsysteme (TYPO3 und weitere siehe www.opensourcecms.com) hinsichtlich der durch sie angebotenen Grundfunktionalit{\"a}ten und der verwen-deten Templates und Vorlagen zu untersuchen. Die aus dieser Analyse resultierenden Ergebnisse sind Ausgangspunkt f{\"u}r die Anforderungsdefinition des zu erstellenden Mini-WCMS. Anschließend ist eine prototypische Implementierung des theoretisch entstan-denen Systems, zugeschnitten auf die speziellen Bed{\"u}rfnisse der Professur, vorzunehmen und hinsichtlich seiner Eignung zu diskutieren.}, subject = {Content Management}, language = {de} } @inproceedings{Kisil, author = {Kisil, Vladimir}, title = {FILLMORE-SPRINGER-CNOPS CONSTRUCTION IMPLEMENTED IN GINAC}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2974}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29744}, pages = {103}, abstract = {This is an implementation of the Fillmore-Springer-Cnops construction (FSCc) based on the Clifford algebra capacities of the GiNaC computer algebra system. FSCc linearises the linear-fraction action of the Mobius group. This turns to be very useful in several theoretical and applied fields including engineering. The core of this realisation of FSCc is done for an arbitrary dimension, while a subclass for two dimensional cycles add some 2D-specific routines including a visualisation to PostScript files through the MetaPost or Asymptote software. This library is a backbone of many result published in, which serve as illustrations of its usage. It can be ported (with various level of required changes) to other CAS with Clifford algebras capabilities.}, subject = {Architektur }, language = {en} } @inproceedings{Faustino, author = {Faustino, Nelson}, title = {FISCHER DECOMPOSITION FOR DIFFERENCE DIRAC OPERATORS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2955}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29551}, pages = {10}, abstract = {We establish the basis of a discrete function theory starting with a Fischer decomposition for difference Dirac operators. Discrete versions of homogeneous polynomials, Euler and Gamma operators are obtained. As a consequence we obtain a Fischer decomposition for the discrete Laplacian. For the sake of simplicity we consider in the first part only Dirac operators which contain only forward or backward finite differences. Of course, these Dirac operators do not factorize the classic discrete Laplacian. Therefore, we will consider a different definition of a difference Dirac operator in the quaternionic case which do factorizes the discrete Laplacian.}, subject = {Architektur }, language = {en} } @inproceedings{Bilchuk, author = {Bilchuk, Irina}, title = {GEOMETRIC IDENTIFICATION OF OBJECTS IN CIVIL ENGINEERING APPLICATIONS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2927}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29274}, pages = {21}, abstract = {Objects for civil engineering applications can be identified with their reference in memory, their alpha-numeric name or their geometric location. Particularly in graphic user interfaces, it is common to identify objects geometrically by selection with the mouse. As the number of geometric objects in a graphic user interface grows, it becomes increasingly more important to treat the basic operations add, search and remove for geometric objects with great efficiency. Guttmann has proposed the Region-Tree (R-tree) for geometric identification in an environment which uses pages on disc as data structure. Minimal bounding rectangles are used to structure the data in such a way that neighborhood relations can be described effectively. The literature shows that the parameters which influence the efficiency of the R-trees have been studied extensively, but without conclusive results. The goal of the research which is reported in this paper is to determine reliably the parameters which significantly influence the efficiency of R-trees for geometric identification in technical drawings. In order to make this investigation conclusive, it must be performed with the best available software technology. Therefore an object-oriented software for the method is developed. This implementation is tested with technical drawings containing many thousands of geometric objects. These drawings are created automatically by a stochastic generator which is incorporated into a test bed consisting of an editor and a visualisor. This test bed is used to obtain statistics for the main factors which affect the efficiency of R-trees. The investigation shows that the following main factors which affect the efficiency can be identified reliably : number of geometric objects on the drawing the minimum und maximum number of children of a node of the tree the maximum width and height of the minimal bounding rectangles of the geometric objects relative to the size of the drawing.}, subject = {Architektur }, language = {en} } @phdthesis{Haefner2006, author = {H{\"a}fner, Stefan}, title = {Grid-based procedures for the mechanical analysis of heterogeneous solids}, doi = {10.25643/bauhaus-universitaet.858}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20070830-9185}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {The importance of modern simulation methods in the mechanical analysis of heterogeneous solids is presented in detail. Thereby the problem is noted that even for small bodies the required high-resolution analysis reaches the limits of today's computational power, in terms of memory demand as well as acceptable computational effort. A further problem is that frequently the accuracy of geometrical modelling of heterogeneous bodies is inadequate. The present work introduces a systematic combination and adaption of grid-based methods for achieving an essentially higher resolution in the numerical analysis of heterogeneous solids. Grid-based methods are as well primely suited for developing efficient and numerically stable algorithms for flexible geometrical modeling. A key aspect is the uniform data management for a grid, which can be utilized to reduce the effort and complexity of almost all concerned methods. A new finite element program, called Mulgrido, was just developed to realize this concept consistently and to test the proposed methods. Several disadvantages which generally result from grid discretizations are selectively corrected by modified methods. The present work is structured into a geometrical model, a mechanical model and a numerical model. The geometrical model includes digital image-based modeling and in particular several methods for the theory-based generation of inclusion-matrix models. Essential contributions refer to variable shape, size distribution, separation checks and placement procedures of inclusions. The mechanical model prepares the fundamentals of continuum mechanics, homogenization and damage modeling for the following numerical methods. The first topic of the numerical model introduces to a special version of B-spline finite elements. These finite elements are entirely variable in the order k of B-splines. For homogeneous bodies this means that the approximation quality can arbitrarily be scaled. In addition, the multiphase finite element concept in combination with transition zones along material interfaces yields a valuable solution for heterogeneous bodies. As the formulation is element-based, the storage of a global stiffness matrix is superseded such that the memory demand can essentially be reduced. This is possible in combination with iterative solver methods which represent the second topic of the numerical model. Here, the focus lies on multigrid methods where the number of required operations to solve a linear equation system only increases linearly with problem size. Moreover, for badly conditioned problems quite an essential improvement is achieved by preconditioning. The third part of the numerical model discusses certain aspects of damage simulation which are closely related to the proposed grid discretization. The strong efficiency of the linear analysis can be maintained for damage simulation. This is achieved by a damage-controlled sequentially linear iteration scheme. Finally a study on the effective material behavior of heterogeneous bodies is presented. Especially the influence of inclusion shapes is examined. By means of altogether more than one hundred thousand random geometrical arrangements, the effective material behavior is statistically analyzed and assessed.}, subject = {B-Spline}, language = {en} } @inproceedings{BrackxDeSchepperDeSchepperetal., author = {Brackx, Fred and De Schepper, Hennie and De Schepper, Nele and Sommen, Frank}, title = {HERMITIAN CLIFFORD-HERMITE WAVELETS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2931}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29313}, pages = {13}, abstract = {The one-dimensional continuous wavelet transform is a successful tool for signal and image analysis, with applications in physics and engineering. Clifford analysis offers an appropriate framework for taking wavelets to higher dimension. In the usual orthogonal case Clifford analysis focusses on monogenic functions, i.e. null solutions of the rotation invariant vector valued Dirac operator ∂, defined in terms of an orthogonal basis for the quadratic space Rm underlying the construction of the Clifford algebra R0,m. An intrinsic feature of this function theory is that it encompasses all dimensions at once, as opposed to a tensorial approach with products of one-dimensional phenomena. This has allowed for a very specific construction of higher dimensional wavelets and the development of the corresponding theory, based on generalizations of classical orthogonal polynomials on the real line, such as the radial Clifford-Hermite polynomials introduced by Sommen. In this paper, we pass to the Hermitian Clifford setting, i.e. we let the same set of generators produce the complex Clifford algebra C2n (with even dimension), which we equip with a Hermitian conjugation and a Hermitian inner product. Hermitian Clifford analysis then focusses on the null solutions of two mutually conjugate Hermitian Dirac operators which are invariant under the action of the unitary group. In this setting we construct new Clifford-Hermite polynomials, starting in a natural way from a Rodrigues formula which now involves both Dirac operators mentioned. Due to the specific features of the Hermitian setting, four different types of polynomials are obtained, two types of even degree and two types of odd degree. These polynomials are used to introduce a new continuous wavelet transform, after thorough investigation of all necessary properties of the involved polynomials, the mother wavelet and the associated family of wavelet kernels.}, subject = {Architektur }, language = {en} } @inproceedings{Jahnke, author = {Jahnke, Georg}, title = {HISTORISCHE BAUSUBSTANZ IN MECKLENBURG}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2971}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29719}, pages = {11}, abstract = {Mit diesen Ausf{\"u}hrungen wird ein Beitrag zum weiteren Erhalt der historischen Bausubstanz in Mecklenburg aus der Sicht der Tragwerksanalyse geleistet. Dabei best{\"a}tigt es sich immer mehr, dass mit dem Modell der Geometrie, der Belastung und des Materials gleichberechtigte Modelle f{\"u}r eine wirklichkeitsnahe Einsch{\"a}tzung des Tragverhaltens eines Tragwerks vorliegen m{\"u}ssen. Es zeigt sich, dass dabei die besten Berechnungsprogramme nur die Ergebnisse liefern k{\"o}nnen, die mit den Eingabedaten zu erzielen sind. So hat sich der Forschungsschwerpunkt im Lehrgebiet Tragwerkslehre des FB Architektur an der Hochschule Wismar in den letzten Jahren auf die realistische Abbildung der Wechselwirkung zwischen der Bauaufnahme und der geometrischen Modellierung konzentriert. In diesem Bereich zeigen sich als Schwerpunkte die Wechselwirkung zwischen Sch{\"a}den und Tragwerksanalyse und die Wechselwirkung zwischen der aufgenommenen Geometrie und dem geometrischen Modell f{\"u}r die Tragwerksanalyse. Die F{\"u}lle der aufgenommenen Daten sind dabei in der Regel mehr hinderlich als ein Segen f{\"u}r die Tragwerksanalyse. Hier wurde gezeigt, welche und wie viele geometrische Daten f{\"u}r das geometrische Modell f{\"u}r die Tragwerksanalyse sinnvoll sind. Da die eigene Datenaufnahme relativ viel Zeit beansprucht, wurde eine "geistige" Bauaufnahme durchgef{\"u}hrt. Dazu wird der historische Planungsprozess in den einzelnen Formfindungsschritten nachvollzogen und in die virtuelle Realit{\"a}t {\"u}berf{\"u}hrt. Mit dieser Methode ergeben sich unterschiedliche Bauzust{\"a}nde und es lassen sich auch m{\"o}gliche Bauphasen abbilden. Die Tragwerksanalyse dieser virtuellen Realit{\"a}t zeigt dann m{\"o}gliche Schw{\"a}chen der Tragwerke und/oder die Notwendigkeit konstruktiver Ver{\"a}nderungen. Ein Vergleich der Ergebnisse der Tragwerksanalyse mit der Realit{\"a}t anhand des vorliegenden Datenbestands liefert die Grundlage f{\"u}r den aktuellen Handlungsbedarf. Da der Bauzustand eines Bauwerkes unter einer zeitlichen Ver{\"a}nderung steht, werden Methoden {\"u}berpr{\"u}ft, die es erm{\"o}glichen, einen einmal vorgelegten Datenbestand aufzubereiten und weiter zu verwalten.}, subject = {Architektur }, language = {de} } @inproceedings{SchanzWuttkeDineva, author = {Schanz, Tom and Wuttke, Frank and Dineva, Petia}, title = {HYBRID APPROACH OF WAVE NUMBER INTEGRATION-BOUNDARY INTEGRAL EQUATION METHOD FOR SITE EFFECT ESTIMATION OF A LATERALLY VARYING SEISMIC REGION}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2913}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29132}, pages = {15}, abstract = {In this paper we evaluate 2D models for soil-water characteristic curve (SWCC), that incorporate the hysteretic nature of the relationship between volumetric water content Θ and suction Ψ. The models are based on nonlinear least squares estimation of the experimental data for sand. To estimate the dependent variable Θ the proposed models include two independent variables, suction and sensors reading position (depth d in the column test). The variable d represents not only the position where suction and water content are measured but also the initial suction distribution before each of the hydraulic loading test phases. Due to this the proposed 2D regression models acquire the advantage that they: (a) can be applied for prediction of Θ for any position along the column and (b) give the functional form for the scanning curves.}, subject = {Architektur }, language = {en} } @inproceedings{Goettlicher, author = {G{\"o}ttlicher, Manfred}, title = {HYBRID SOLID-LIQUID MODEL FOR GRANULAR MATERIAL}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2959}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29596}, pages = {20}, abstract = {Solid behavior as well as liquid behavior characterizes the flow of granular material in silos. The presented model is based on an appropriate interaction of a displacement field and a velocity field. The constitutive equations and the applied algorithm are developed from the exact solution for a standard case. The standard case evolves from a very tall vertical plane strain silo containing material that flows at a constant speed. No horizontal displacements and velocities take place. No changes regarding the field values arise in the vertical direction and in time. Tension is not allowed at any point. Coulomb friction represents the effects of the vertical walls. The interaction between the flowing material and the walls is covered by a forced boundary condition resulting in an additional matrix for the solid component as well as for the liquid component. The resulting integral equations are designed to be solved directly. Three coefficients describe the properties of the granular material. They govern elastic solid behavior in combination with viscous liquid behavior.}, subject = {Architektur }, language = {de} } @phdthesis{Roessler2006, author = {R{\"o}ßler, Christiane}, title = {Hydratation, Fließf{\"a}higkeit und Festigkeitsentwicklung von Portlandzement - Einfluss von Fließmitteln, Alkalisulfaten und des Abbindereglers}, doi = {10.25643/bauhaus-universitaet.799}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20070206-8425}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {Eine zielf{\"u}hrende Anwendung von Zusatzmitteln bei der Ausf{\"u}hrung anspruchsvoller Betonbauten setzt einen hohen Kenntnisstand bez{\"u}glich der Wirkungsmechanismen und Interaktionen der einzelnen Betonkomponenten voraus. In der vorliegenden Arbeit wurden einige Aspekte der Zementhydratation in Abh{\"a}ngigkeit von der Fließmittelzugabe diskutiert. Im Ergebnis liefern die Teile eins und zwei der vorliegenden Arbeit einen Beitrag dazu, Ver{\"a}nderungen der Fließf{\"a}higkeit von Zementleim in Abh{\"a}ngigkeit der Zementhydratation und Fließmittelzugabe besser zu verstehen. Es konnte so z.B. gezeigt werden, dass Bildung langprismatischer Kristalle (z.B. Syngenit, Gips) die Fließf{\"a}higkeit von Zementleim und Beton vermindert. Infolge anhaltender Scherung von Zementleimen / Betonen mit langprismatischen Kristallen wird ein Zuwachs an Fließf{\"a}higkeit erzielt. Elektronenmikroskopische Untersuchungen zeigen, dass dies darauf zur{\"u}ckzuf{\"u}hren ist, dass die Kristalle in eine Vorzugsorientierung relativ zur Scherbewegung rotieren. Weiterhin wurde der Mechanismus einer so genannten Zement-Fließmittel-Inkompatibilit{\"a}t aufgezeigt. Durch diese Erweiterung des Kenntnisstandes zum Einfluss von Fließmitteln auf die Zementhydratation ist es m{\"o}glich der Zement-Fließmittel-Inkompatibilit{\"a}t durch gezielte Auswahl des Zementes vorzubeugen. Dabei ist besonders darauf zu achten, dass der Zement ein ausgewogenes Verh{\"a}ltnis an zur Reaktion zur Verf{\"u}gung stehendem C3A und Menge / L{\"o}slichkeit des Abbindereglers besitzt. Fließmittel ver{\"a}ndern nicht nur die Verarbeitungseigenschaften sondern auch die Festigkeit und Dauerhaftigkeit von Zementstein und Beton. Im dritten Teil der vorliegenden Arbeit wird daher der Einfluss der Fließmittel und deren verfl{\"u}ssigender Wirkung auf die Festigkeitsentwicklung von Zementstein und C3S untersucht. Es konnte gezeigt werden, dass durch die dispergierende Wirkung der Fließmittel auch ohne Verminderung des Wasserzementwertes, eine Verdichtung des Zementsteingef{\"u}ges erzielt werden kann. Es konnte weiterhin gezeigt werden, dass durch die Erh{\"o}hung der Partikelpackungsdichte am Anfang der Hydratation die Ausbildung der festigkeitsgebenden C-S-H Phasen ver{\"a}ndert wird. Ein dichteres Verwachsen dieser nanostrukturierten C-S-H Phasen erm{\"o}glicht einen zus{\"a}tzlichen Festigkeitszuwachs.}, subject = {Zement}, language = {de} } @inproceedings{ErikssonKettunen, author = {Eriksson, Sirkka-Liisa and Kettunen, Jarkko}, title = {HYPERMONOGENIC POLYNOMIALS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2950}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29509}, pages = {22}, abstract = {It is well know that the power function is not monogenic. There are basically two ways to include the power function into the set of solutions: The hypermonogenic functions or holomorphic Cliffordian functions. L. Pernas has found out the dimension of the space of homogenous holomorphic Cliffordian polynomials of degree m, but his approach did not include a basis. It is known that the hypermonogenic functions are included in the space of holomorphic Cliffordian functions. As our main result we show that we can construct a basis for the right module of homogeneous holomorphic Cliffordian polynomials of degree m using hypermonogenic polynomials and their derivatives. To that end we first recall the function spaces of monogenic, hypermonogenic and holomorphic Cliffordian functions and give the results needed in the proof of our main theorem. We list some basic polynomials and their properties for the various function spaces. In particular, we consider recursive formulas, rules of differentiation and properties of linear independency for the polynomials.}, subject = {Architektur }, language = {en} } @inproceedings{Ostrowski, author = {Ostrowski, M.}, title = {INTEGRATED MATHEMATICAL MODELLING AS A BASIS FOR DECISION MAKING IN WATER MANAGEMENT}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2997}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29979}, pages = {9}, abstract = {Water resources development and management is a complex problem. It includes the design and operation of single system components, often as part of larger interrelated systems and usually on the basis of river basins. While several decades ago the dominant objective was the maximization of economic benefit, other objectives have evolved as part of the sustainable development envisaged. Today, planning and operation of larger water resources systems is practically impossible without adequate computer tools, normally being one or several models, increasingly combined with data bank management systems and multi criteria assessment procedures in decision support systems. The use of models in civil engineering already has a long history when structural engineering is considered. These design support models, however, must rather be seen as expert systems made to support the engineer with his daily work. They often have no direct link to stakeholders and the decision makers community. The scale of investigation is often much larger in water resources engineering than in structural engineering which is related to different stakeholders and decision making procedures. Still, several similarities are obvious which can be summarized as the search for a compromise solution on a complex, i.e. multiobjective and interdisciplinary decision problem. While in structural engineering e.g. aestetics, stability and energy consumption might be important evaluation criteria in addition to construction and maintenance cost other or additional criteria have to be considered in water resources planning such as political, environmental and social criteria. In this respect civil engineers tend to overemphasize technical criteria. For the future the existing expert systems should be embedded into an improved decision support shell, keeping in mind that decision makers are hardly interested in numerical modelling results. The paper will introduce into the problem and demonstrate the state of the art by means of an example.}, subject = {Architektur }, language = {en} } @inproceedings{KlawitterOstrowski, author = {Klawitter, Arne and Ostrowski, M.}, title = {INTEGRATED RAINFALL RUNOFF MODELLING IN SMALL URBANIZED CATCHMENTS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2976}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29767}, pages = {12}, abstract = {A concept for integrated modeling of urban and rural hydrology is introduced. The concept allows for simulations on the catchment scale as well as on the local scale. It is based on a 2-layer-approach which facilitates the parallel coupling of a catchment hydrology model with an urban hydrology model, considering the interactions between the two systems. The concept has been implemented in a computer model combining a grid based distributed hydrological catchment model and a hydrological urban stormwater model based on elementary units. The combined model provides a flexible solution for time and spatial scale integration and offers to calculate separate water balances for urban and rural hydrology. Furthermore, it is GIS-based which allows for easy and accurate geo-referencing of urban overflow structures, which are considered as points of interactions between the two hydrologic systems. Due to the two-layer-approach, programs of measures can be incorporated in each system separately. The capabilities of the combined model have been tested on a hypothetical test case and a real world application. It could be shown that the model is capable of accurately quantifying the effects of urbanization in a catchment. The affects of urbanization can be analyzed at the catchment outlet, but can also be traced back to its origins, due to the geo-referencing of urban overflow structures. This is a mayor advantage over conventional hydrological catchment models for the analysis of land use changes.}, subject = {Architektur }, language = {en} } @article{Both2006, author = {Both, Petra von}, title = {Integration von Informationsprozessen auf der Basis von Nemetschek Technologien}, doi = {10.25643/bauhaus-universitaet.851}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8511}, year = {2006}, subject = {Weimar / Bauhaus-Universit{\"a}t / Professur Baubetrieb und Bauverfahren}, language = {de} } @inproceedings{SchererGrinewitschus, author = {Scherer, Klaus and Grinewitschus, Viktor}, title = {INTEGRIERTE SYSTEMBEDIENUNG IN GEB{\"A}UDEN: KOMPLEXE TECHNIK EINFACHER HANDHABEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3013}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30132}, pages = {7}, abstract = {R{\"a}ume und Geb{\"a}ude sind heute wegen der enormen Funktionalit{\"a}t der technischen Geb{\"a}udeausr{\"u}stung (TGA) in Kombination mit der sonstigen Ausstattung und den diversen Anwendungsprozessen und Nutzergruppen ohne innovative Konzepte der integrierten Bedienung kaum noch beherrschbar bzw. optimal nutzbar. Dies gilt sowohl f{\"u}r Wohn- als auch f{\"u}r Zweckimmobilien. Die Geb{\"a}udeleittechnik (GLT) und die Geb{\"a}udeautomation (GA) k{\"o}nnen hier unter sinnvoller Integration der M{\"o}glichkeiten der Mikroelektronik, Multimedia-, Kommunikations- und Informationstechnik erheblich zu nutzbringenden Innovationen beitragen. Die Automobilindustrie hat in den letzten Jahren gezeigt, wie durch einen integralen Systemansatz und durch Einsatz von Elektronik, Kommunikations- und Informationstechnik eine sinnvolle technische Assistenz der Anwender machbar ist. Genannt sei hier das Konzept des Cockpits mit integrierter Funktionsb{\"u}ndelung und der Informationskonzentration am Armaturenbrett. Im Gegensatz zum Automobil ist der Bereich der technischen Geb{\"a}udeausstattung in Wohn- und Nutzimmobilien gekennzeichnet durch eine starke Fragmentierung in unterschiedlichste Gewerke unter Beteiligung vieler oft schlecht koordinierter Akteure. Durch das Duisburger inHaus-Innovationszentrum f{\"u}r Intelligente Raum- und Geb{\"a}udesysteme der Fraunhofer-Gesellschaft wurden in den letzten Jahren neuartige Konzepte der Systemintegration heterogener Technik auf der Basis von Middleware-Plattformen und Multimedia-Technologien und -Ger{\"a}ten entwickelt, getestet und in die Anwendung getragen. Einer der ersten Systemanwendungen dieses offenen Infrastrukturkonzepts ist die integrierte Systembedienung mit zum Teil v{\"o}llig neuen Bedienkonzepten und einer starken Bedienungsvereinfachung auch komplexester Technikausr{\"u}stungen in Immobilien. Der Beitrag beschreibt nach einer Analyse der Ausgangslage die technologischen Grundz{\"u}ge der integrierten Systembedienung. Es folgen einige Anwendungsbeispiele und eine zusammenfassende Bewertung mit einem Ausblick auf weiterf{\"u}hrende Aktivit{\"a}ten.}, subject = {Architektur }, language = {de} } @inproceedings{StoimenovaLinsDatchevaetal., author = {Stoimenova, Eugenia and Lins, Yvonne and Datcheva, Maria and Schanz, Tom}, title = {INVERSE MODELLING OF SOIL HYDRAULIC CHARACTERISTIC FUNCTIONS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2985}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29858}, pages = {12}, abstract = {In this paper we evaluate 2D models for soil-water characteristic curve (SWCC), that incorporate the hysteretic nature of the relationship between volumetric water content θ and suction ψ. The models are based on nonlinear least squares estimation of the experimental data for sand. To estimate the dependent variable θ the proposed models include two independent variables, suction and sensors reading position (depth d in the column test). The variable d represents not only the position where suction and water content are measured but also the initial suction distribution before each of the hydraulic loading test phases. Due to this the proposed 2D regression models acquire the advantage that they: (a) can be applied for prediction of θ for any position along the column and (b) give the functional form for the scanning curves.}, subject = {Architektur }, language = {en} } @inproceedings{LutherKoenke, author = {Luther, Torsten and K{\"o}nke, Carsten}, title = {INVESTIGATION OF CRACK GROWTH IN POLYCRYSTALLINE MESOSTRUCTURES}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2988}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29886}, pages = {11}, abstract = {The design and application of high performance materials demands extensive knowledge of the materials damage behavior, which significantly depends on the meso- and microstructural complexity. Numerical simulations of crack growth on multiple length scales are promising tools to understand the damage phenomena in complex materials. In polycrystalline materials it has been observed that the grain boundary decohesion is one important mechanism that leads to micro crack initiation. Following this observation the paper presents a polycrystal mesoscale model consisting of grains with orthotropic material behavior and cohesive interfaces along grain boundaries, which is able to reproduce the crack initiation and propagation along grain boundaries in polycrystalline materials. With respect to the importance of modeling the geometry of the grain structure an advanced Voronoi algorithm is proposed to generate realistic polycrystalline material structures based on measured grain size distribution. The polycrystal model is applied to investigate the crack initiation and propagation in statically loaded representative volume elements of aluminum on the mesoscale without the necessity of initial damage definition. Future research work is planned to include the mesoscale model into a multiscale model for the damage analysis in polycrystalline materials.}, subject = {Architektur }, language = {en} } @inproceedings{KimuraMakinoMaegaitoetal., author = {Kimura, Atsushi and Makino, Y. and Maegaito, Kentaro and Suzuki, Osamu}, title = {ITERATION DYNAMICAL SYSTEMS OF DISCRETE LAPLACIANS ON THE PLANE LATTICE (II) (THE VISUAL IMPRESSIONS GIVEN BY DESIGN-PATTERNS)}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2973}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29731}, pages = {4}, abstract = {The present study was designed to investigate the underlying factors determining the visual impressions of design-patterns that have complex textures. Design-patterns produced by "the dynamical system defined by iterations of discrete Laplacians on the plane lattice" were adopted as stimuli because they were not only complex, but also defined mathematically. In the experiment, 21 graduate and undergraduate students sorted 102 design-patterns into several groups by visual impressions. Those 102 patterns were classified into 12 categories by the cluster analysis. The results showed that the regularity of pattern was a most efficient factor for determining visual impressions of design-pattern, and there were some correspondence between visual impressions and mathematical variables of design-pattern. Especially, the visual impressions were influenced greatly by the neighborhood, and less influenced by steps of iterations.}, subject = {Architektur }, language = {en} } @inproceedings{AibaMaegaitoSuzuki, author = {Aiba, Yoshihisa and Maegaito, Kentaro and Suzuki, Osamu}, title = {Iteration dynamical systems of discrete Laplacians on the plane lattice(I) (Basic properties and computer simulations of the dynamical systems)}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2917}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29178}, pages = {3}, abstract = {In this study we introduce a concept of discrete Laplacian on the plane lattice and consider its iteration dynamical system. At first we discuss some basic properties on the dynamical system to be proved. Next making their computer simulations, we show that we can realize the following phenomena quite well:(1) The crystal of waters (2) The designs of carpets, embroideries (3) The time change of the numbers of families of extinct animals, and (4) The echo systems of life things. Hence we may expect that we can understand the evolutions and self organizations by use of the dynamical systems. Here we want to make a stress on the following fact: Although several well known chaotic dynamical systems can describe chaotic phenomena, they have difficulties in the descriptions of the evolutions and self organizations.}, subject = {Architektur }, language = {en} } @inproceedings{Heinrich, author = {Heinrich, Timo}, title = {KENNZEICHNUNGSBASIERTER ZUGRIFF VON PROZESSMODELLEN AUF OBJEKTBEST{\"A}NDE DES BAUWESENS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2966}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29669}, pages = {13}, abstract = {F{\"u}r eine beherrschbare Koordination und Durchf{\"u}hrung von Planungsaufgaben in Bauprojekten wird der Planungsprozess zunehmend in formalisierten Modellen - Prozessmodellen - beschrieben. Die Produktmodellforschung ihrerseits widmet sich der Speicherung von Planungsdaten in Form von objektorientierten Modellen im Rechner. Hauptaugenmerk sind dabei die Wahrung der Konsistenz und die Modellierung von Abh{\"a}ngigkeiten innerhalb dieses Planungsmaterials. Der Bezug zu den Akteuren der Planung wird nicht direkt hergestellt. Ein formal beschriebener Planungsprozesses kann in der Praxis noch nicht derart realisiert werden, dass ein Zugriff auf Einzelobjekte des Planungsprozesses gew{\"a}hrleistet ist. Bestehende Planungsunterst{\"u}tzungs- und Workflowmanagement-Systeme abstrahieren und ordnen das Planungsmaterial nach wie vor auf Dateiebene. Der vorliegende Artikel beschreibt eine Methode f{\"u}r die geeignete Verbindung von formalisierten Prozessmodellen in der Bauplanung mit den Einzelobjekten, die in den modellorientierten Objektmengen kodiert sind. Dabei wird die Zugeh{\"o}rigkeit bestimmter Objekte zu Pl{\"a}nen und Dokumenten (zum Zwecke des Datenaustauschs) nicht l{\"a}nger durch die physische Zuordnung zu Dateien festgelegt. Es wird ein formales Beschreibungsmittel vorgestellt, welches die entsprechende Teilmengenbildung aus der Gesamtheit der Planungsobjekte erm{\"o}glicht. F{\"u}r die bisherigen Formen des Datenaustausches werden aus den Objektmodellen der Planung Teilmengen herausgel{\"o}st und physikalisch zwischen den Planern transportiert. Das neue Beschreibungsmittel hingegen erlaubt es, die Bildungsvorschrift f{\"u}r Objektteilmengen statt der Mengen selbst zwischen den Planern auszutauschen. Der Zugriff auf die konkreten Objekte findet dann direkt modellbasiert statt.}, subject = {Architektur }, language = {de} } @inproceedings{RueppelMeissnerLange, author = {R{\"u}ppel, Uwe and Meißner, Udo F. and Lange, Michael}, title = {KOOPERATIVE BRANDSCHUTZPLANUNG MIT SOFTWARE-AGENTEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3007}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30071}, pages = {10}, abstract = {Die effektive Kooperation aller beteiligten Fachplaner im Bauplanungsprozess ist die Voraussetzung f{\"u}r wirtschaftliches und qualitativ hochwertiges Bauen. Bauprojektorganisationen bestehen in der Regel aus zahlreichen unabh{\"a}ngigen Planungspartnern, die {\"o}rtlich verteilt spezifische Planungsaufgaben bearbeiten und die Ergebnisse in Teilproduktmodellen ablegen. Da Planungsprozesse im Bauwesen stark arbeitsteilig ablaufen, sind die Teilproduktmodelle der einzelnen Fachplanungen in hohem Maße voneinander abh{\"a}ngig. Ziel des hier vorgestellten Ansatzes ist die Integration der Teilproduktmodelle der Geb{\"a}udeplanung in einem netzwerkbasierten Modellverbund am Beispiel der Brandschutzplanung. Im Beitrag werden die Probleme der Verteiltheit und insbesondere der semantischen Heterogenit{\"a}t der involvierten Teilproduktmodelle betrachtet. Der verteilte Zugriff wird mithilfe mobiler Software-Agenten realisiert. Die Agenten k{\"o}nnen sich dabei frei im netzwerkbasierten Planungsverbund bewegen und agieren als Vertreter der Fachplaner. Das Problem der semantischen Heterogenit{\"a}t der Teilproduktmodelle wird auf der Basis von Ontologien gel{\"o}st. Dazu werden erstens Dom{\"a}nenontologien entwickelt, die Objekte der realen Welt einer abgeschlossenen Dom{\"a}ne, hier des Brandschutzes, abbilden. Zweitens werden Applikationsontologien entwickelt, die die einzelnen propriet{\"a}ren Datenhaltungen (im Sinne von Teilproduktmodellen) der jeweiligen Fachplanungen repr{\"a}sentieren. Beide Ontologien werden mit einem regelbasierten Ansatz verkn{\"u}pft. Im vorgestellten Anwendungsfall Brandschutz dient die Dom{\"a}nenontologie als einheitliche Schnittstelle f{\"u}r den Zugriff auf die verteilten Modelle und abstrahiert dabei von deren Datenbankspezifika und propriet{\"a}ren Schemata. Mithilfe von mobilen Agenten und semantischen Technologien kann so eine Plattform zur Verf{\"u}gung gestellt werden, die erstens die dynamische Integration von Ressourcen in den Planungsverbund erlaubt und zweitens auf deren Basis unabh{\"a}ngig von der Verteiltheit und Heterogenit{\"a}t der eingebundenen Ressourcen ingenieurgerechte Verarbeitungsmethoden realisiert werden k{\"o}nnen.}, subject = {Architektur }, language = {de} } @phdthesis{Brandstetter2006, author = {Brandstetter, Thomas}, title = {Kr{\"a}fte messen. Die Maschine von Marly und die Kultur der Technik 1680-1840}, doi = {10.25643/bauhaus-universitaet.760}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20060702-7984}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {Die Arbeit besch{\"a}ftigt sich mit der Entstehung eines {\"o}konomischen Kraftmaßes am Beispiel der Maschine von Marly im Zeitraum von ca. 1680 bis 1840. Die Leitthese der Dissertation besagt, dass vom 17. zum 19. Jahrhundert eine grundlegende Transformation des Maschinenbegriffs stattfand, die als {\"U}bergang vom Substanzbegriff zum Funktionsbegriff der Maschine bezeichnet werden kann. Im 17. Jahrhundert wurden mechanische Apparate als in sich geschlossene, selbstbez{\"u}gliche Strukturen aufgefasst. Als anschaulich erfahrbare Objekte konnten sie als Bildgeber dienen, die mittels des Verfahrens der Strukturanalogie Erkl{\"a}rungsmuster f{\"u}r verschiedenste Ph{\"a}nomene (K{\"o}rper, Staat, Welt) boten. Demzufolge galten sie als selbstevident: sie waren erkl{\"a}rend und mussten selbst nicht erkl{\"a}rt werden. Ihr etwaiger Zweck und ihre Einbettung in gesellschaftliche Zusammenh{\"a}nge spielten dabei keine Rolle. Wie anhand der Beschreibungen und Darstellungen aus jener Zeit nachgewiesen werden kann, wurde die Maschine von Marly innerhalb dieser Episteme als architektonisches Objekt wahrgenommen, bei dem vor allem das Zusammenspiel der einzelnen Elemente Aufmerksamkeit erregte. Wie andere Maschinen auch stand sie unter dem Primat der Sichtbarkeit. Man war davon {\"u}berzeugt, dass die Eigenschaften einer Maschine von der strukturellen Anordnung ihrer Bauteile abhingen und glaubte, ihre Qualit{\"a}t an ihrer Gestalt ablesen zu k{\"o}nnen. Ab der Mitte des 18. Jahrhunderts tauchte die Maschine von Marly in den Schriften physiokratischer Autoren auf. Zuerst diente sie dort als Beispiel f{\"u}r die Verschwendungssucht Louis' XIV. und als Metapher f{\"u}r eine schlechte Einrichtung des Staates. Doch zunehmend begann man, sie auch in ihrer Faktizit{\"a}t als technisch-politisches Objekt zu begreifen. Man kritisierte ihre aktuelle Nutzung und schlug andere M{\"o}glichkeiten ihrer Verwendung vor, etwa die Bew{\"a}sserung von Feldern oder die st{\"a}dtische Trinkwasserversorgung. Damit war die Maschine von Marly nicht l{\"a}nger ein Modell f{\"u}r die Einrichtung des Staates, das nur am Maßstab der immanenten Perfektion beurteilt werden konnte. Vielmehr war sie nun ein Instrument der Regierung, das sich als Teil eines staatlich verfassten Gemeinwesens verantworten musste. Als solches wurde sie auch zu einem bevorzugten Gegenstand aufkl{\"a}rerischer Reformprojekte. Das zeigt sich besonders deutlich am Wettbewerb, den die Pariser Akademie der Wissenschaften 1784-1786 organisiert hatte und der Vorschl{\"a}ge zur Verbesserung oder Ersetzung der Maschine von Marly zum Gegenstand hatte. Die Auswertung der mehr als 100 eingereichten Projekte und Memoranden erm{\"o}glicht einen einzigartigen Blick auf die Hoffnungen und W{\"u}nsche, die Ende des 18. Jahrhunderts an die Erfindung technischer Ger{\"a}te gekoppelt waren. Um 1800 kann man die allm{\"a}hliche Entstehung eines Funktionsbegriffs der Maschine bemerken. Lazare Carnots Essai sur les machines en g{\´e}n{\´e}ral, der eine in der Sprache der Algebra artikulierte Definition der Maschine beinhaltete, trug maßgeblich dazu bei, die Anschaulichkeit zugunsten eines operativen Symbolismus zu delegitimieren. Erst dadurch war die Formulierung eines Effizienzkalk{\"u}ls m{\"o}glich. Erg{\"a}nzt wurde diese Formalisierung durch den Diskurs der Industrialisierung, in dem technische Apparate zunehmend als Produktionsmittel verstanden wurden. Die Maschine von Marly war ein wichtiger Schauplatz f{\"u}r die Entstehung eines {\"o}konomischen Kraftmaßes. Nicht nur wurden dort Experimente mit verschiedenen Messinstrumenten (Dynamometern) durchgef{\"u}hrt, auch diente sie Joseph Montgolfier als Beispiel um zu beweisen, dass Kraft als Geldwert ausgedr{\"u}ckt werden k{\"o}nne. In den ersten Jahrzehnten des 19. Jahrhundert wurden Maschinen schließlich relational als Positionen innerhalb eines nationalen Produktionssystems definiert. Sie galten als Krafttransformatoren, bei denen ein bestimmter Input von ‚force motrice' einen entsprechenden Output von ‚travail utile' ergeben w{\"u}rde. Ihre vornehmlichste Aufgabe war die m{\"o}glichst effiziente Ausnutzung der Kraftressourcen. Den vorl{\"a}ufigen Endpunkt erreichte die Entstehung des {\"o}konomischen Kraftmaßes um 1830 mit der Formulierung des Begriffs der ‚mechanischen Arbeit'.}, subject = {Technik / Geschichte}, language = {de} } @inproceedings{Stangenberg, author = {Stangenberg, Friedhelm}, title = {LIFETIME ORIENTED DESIGN CONCEPTS UNDER ASPECTS OF DEGRADATION}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2915}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170328-29154}, pages = {25}, abstract = {Optimum technological solutions must take into account the entire life cycle of structures including design procedures as well as quality assurance, inspection, maintenance, and repair strategies. Unfortunately, current design standards do not provide a satisfactory basis to ensure expected structural lifetimes. The latter may vary from only a few years for temporary structures to over a century for bridges, water dams or nuclear repositories. Consistent scientific concepts are urgently required to cover this wide spectrum of lifetimes in structural design and maintenance. This was a motivation for a group of scientists at the Ruhr-University Bochum (RUB) to start a special research program supported by the German Research Foundation (DFG) within the Cooperative Research Center SFB 398 since 1996. Institutes of the University Wuppertal and of the University Essen-Duisburg joined the research group. The goal of the Center is to study sources of damage and deterioration in materials and structures, to develop consistent models and simulation methods, to predict structural lifetimes and finally to integrate this predictions into new lifetime-oriented design strategies. Research activities in our center are organised in three Project Groups as follows: - Modelling of lifetime effects - Methods for lifetime-oriented structural analyses - Future lifespan-oriented design strategies.}, subject = {Architektur }, language = {en} } @inproceedings{GalffyBaitschWellmannJelicetal., author = {Galffy, Mozes and Baitsch, Matthias and Wellmann Jelic, Andres and Hartmann, Dietrich}, title = {LIFETIME-ORIENTED OPTIMIZATION OF BRIDGE TIE RODS EXPOSED TO VORTEX-INDUCED ACROSS-WIND VIBRATIONS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2956}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29561}, pages = {12}, abstract = {In recent years, damages in welded connections plates of vertical tie rods of several arched steel bridges have been reported. These damages are due to fatigue caused by wind-induced vibrations. In the present study, such phenomena are examined, and the corresponding lifetime of a reference bridge in M{\"u}nster-Hiltrup, Germany, is estimated, based on the actual shape of the connection plate. Also, the results obtained are compared to the expected lifetime of a connection plate, whose geometry has been optimized separately. The structural optimization, focussing on the shape of the cut at the hanger ends, has been carried out using evolution strategies. The oscillation amplitudes have been computed by means of the Newmark-Wilson time-step method, using an appropriate load model, which has been validated by on-site experiments on the selected reference bridge. Corresponding stress-amplitudes are evaluated by multiplying the oscillation amplitudes with a stress concentration factor. This factor has been computed on the basis of a finite element model of the system "hanger-welding-connection plate", applying solid elements, according to the notch stress approach. The damage estimation takes into account the stochastics of the exciting wind process, as well as the stochastics of the material parameters (fatigue strength) given in terms of Woehler-curves. The shape optimization results in a substantial increase of the estimated hanger lifetime. The comparison of the lifetimes of the bulk plate and of the welding revealed that, in the optimized structure, the welding, being the most sensitive part in the original structure, shows much more resistance against potential damages than the bulk material.}, subject = {Architektur }, language = {en} } @inproceedings{Eickelkamp, author = {Eickelkamp, Jens Peter}, title = {LIQUIDIT{\"A}TSPLANUNG VON BAUPROJEKTEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2948}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29483}, pages = {12}, abstract = {Die Liquidit{\"a}tsplanung von Bauunternehmen XE "Liquidit{\"a}tsplanung" gilt als ein wesentliches Steuerungs-, Kontroll- sowie Informationsinstrument f{\"u}r interne und externe Adressaten und {\"u}bt eine Entscheidungsunterst{\"u}tzungsfunktion aus. Da die einzelnen Bauprojekte einen wesentlichen Anteil an den Gesamtkosten des Unternehmens ausmachen, besitzen diese auch einen erheblichen Einfluß auf die Liquidit{\"a}t und die Zahlungsf{\"a}higkeit der Bauunternehmung. Dem folgend ist es in der Baupraxis eine {\"u}bliche Verfahrensweise, die Liquidit{\"a}tsplanung zuerst projektbezogen zu erstellen und anschließend auf Unternehmensebene zu verdichten. Ziel der Ausf{\"u}hrungen ist es, die Zusammenh{\"a}nge von Arbeitskalkulation XE "Arbeitskalkulation" , Ergebnisrechnung XE "Ergebnisrechnung" und Finanzrechnung XE "Finanzrechnung" in Form eines deterministischen XE "Erkl{\"a}rungsmodells" Planungsmodells auf Projektebene darzustellen. Hierbei soll das Verst{\"a}ndnis und die Bedeutung der Verkn{\"u}pfungen zwischen dem technisch-orientierten Bauablauf und dessen Darstellung im Rechnungs- und Finanzwesen herausgestellt werden. Die Vorg{\"a}nge aus der Bauabwicklung, das heißt die Abarbeitung der Bauleistungsverzeichnispositionen und deren zeitliche Darstellung in einem Bauzeitenplan sind periodisiert in Gr{\"o}ßen der Betriebsbuchhaltung (Leistung, Kosten) zu transformieren und anschließend in der Finanzrechnung (Einzahlungen., Auszahlungen) nach Kreditoren und Debitoren aufzuschl{\"u}sseln.}, subject = {Architektur }, language = {de} } @inproceedings{SzarataStarostina, author = {Szarata, Andrzej and Starostina, T.}, title = {MAMDANI'S FUZZY INFERENCE SYSTEM AS A TOOL FOR MULTIMODAL SPLIT MODELING}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3025}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30257}, pages = {1}, abstract = {This paper presents results of applying Fuzzy Inference System for estimation of the number of potential Park and Ride users. Usually it is difficult to evaluate the number of users because it depends on human factor and data in the considered system are uncertain. In such situation the traditional mathematical approaches can not take into consideration rough data. Therefore a fuzzy approach can be applied in this case. A fuzzy methodology is treated as a proper way to describe choice of mode of transport, and especially that uncertainty accompanied of choosing process has rather fuzzy character. The proposed approach is based on the Mamdani Fuzzy Inference System and for calculation there is used Matlab software with Fuzzy Logic Toolbox. Mamdani model requires, as an input data, knowledge of the shape of membership function. These functions can be calibrated taking into consideration results of questionnaires conducted among users of Park and Ride system. Due to lack of representative sample of users, one has decided to use results of experts' questionnaires as a input data for calibration the shape of membership functions. Describing factor will be generalized cost of the trip for different modes of transport. Proposed approach consists of two main stages: modeling of share of public/private transport trips and Multimodal model estimating number of Park and Ride users. Verification of presented methodology is treated as an indirect proof. Proposed approach can be applied for estimation of bi-modal split. Then the results are compared with traditional approaches based on logit functions. Comparable results of proposed fuzzy approach with traditional logit models can be treated as a confirmation of chosen methodology.}, subject = {Architektur }, language = {en} } @inproceedings{MalonekFalcaoSilva, author = {Malonek, Helmuth Robert and Falc{\~a}o, M. Irene and Silva, Ant{\´o}nio}, title = {MAPLE TOOLS FOR MODIFIED QUATERNIONIC ANALYSIS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2953}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29535}, pages = {7}, abstract = {At the 16th IKM Bock, Falc{\~a}o and G{\"u}rlebeck presented examples of the application of some specially developed Maple-Software in hypercomplex analysis. Other papers of those authors continued this work and showed the efficiency of such tools for concrete numerical calculations as well as for numerical experiments, supporting the detection of new relationships and even theorems in a highly technical theoretical work. The mentioned software has been developed mainly for the use on mapping problems in the Euclidean spaces of dimension 3 and 4 by means of Bergman kernel methods (BKM), which are related to monogenic functions as solutions of generalized Cauchy-Riemann equations with respect to the Euclidean metric (Riesz system). The developed procedures concerning generalized powers of totally regular variables and the corresponding homogeneous polynomials basically rely on results and conventions introduced in the paper "Power series representation for monogenic functions in Rm+1 based on a permutational product", Complex Variables, 15, No.3, 181-191 (1990) by H. Malonek. Since 1992 H. Leutwiler, S. L. Eriksson and others developed in a number of papers a modified Clifford analysis and, particularly, a modified quaternionic analysis. The modification mainly consists in considering generalized Cauchy-Riemann equations with respect to a hyperbolic metric in a half space. The aim of this contribution is to show how through a change of the basic combinatorial relations used in the modified quaternionic analysis the aforementioned Maple-software (that has been recently published on CD-Rom as integrated part of the text book "Funktionentheorie in der Ebene und im Raum" by K. G{\"u}rlebeck, K. Habetha, and W. Spr{\"o}ssig, in the series "Grundstudium Mathematik" of Birkh{\"a}user Verlag, 2006) can directly be used for numerical calculations in the modified theory.}, subject = {Architektur }, language = {en} } @inproceedings{Ubysz, author = {Ubysz, Andrzej}, title = {MATHEMATICAL DESCRIPTION OF SELF-EXCITED VIBRATIONS IN SILO WALLS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3029}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30294}, pages = {7}, abstract = {The paper contains a description of dynamic effects in the silo wall during the outflow of a stored material. The work allows for determining the danger of construction damage due to resonant vibrations and is of practical importance by determining the influence of cyclic pressures and vibro-creeping during prolonged use of a silo. The paper was devised as a result of tests on silo walls in semi-technical scale. The model is generally applicable and allows for identification of parameters in real- size silos as well.}, subject = {Architektur }, language = {en} } @phdthesis{Gehrmann2006, author = {Gehrmann, Hans-Joachim}, title = {Mathematische Modellierung und experimentelle Untersuchungen zur Pyrolyse von Abf{\"a}llen in Drehrohrsystemen}, doi = {10.25643/bauhaus-universitaet.772}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20060806-8119}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {2006}, abstract = {F{\"u}r die Optimierung eines bereits bestehenden Prozesses, z.B. im Hinblick auf den maximal m{\"o}glichen Durchsatz bei gleich bleibender Qualit{\"a}t der Pyrolyseprodukte oder f{\"u}r die Einstellung der Betriebsparameter bei einem unbekannten Einsatzstoff, kann ein mathematisches Modell eine erste Absch{\"a}tzung f{\"u}r die Einstellung betrieblicher Parameter, wie z.B. Temperaturprofile im Gas und Feststoff, geben. Dar{\"u}ber hinaus kann man mit einem Modell f{\"u}r neu zu konzipierende Anlagen konstruktive Parameter ermitteln oder {\"u}berpr{\"u}fen. In dem hier dargestellten vereinfachten Modellansatz werden u. a. die Umsatzvorg{\"a}nge f{\"u}r ein Partikelkollektiv mit Hilfe von Summenparametern aus Untersuchungen an einer Thermowaage und erg{\"a}nzend im Drehrohr ermittelt. Das Prozessmodell basiert auf einem Reaktormodell, das das Verweilzeitverhalten des Einsatzstoffes im Reaktor beschreibt und einem Basismodell, bestehend aus Massen- und Energiebilanzen f{\"u}r Solid und Gas sowie Ans{\"a}tzen zur Trocknung und zum Umsatz. Im Hinblick auf die Verf{\"u}gbarkeit von stoffspezifischen Daten von Abf{\"a}llen sind insbesondere zur Berechnung des Verweilzeitverhaltens und des Umsatzes im Heißbetrieb vereinfachende Ans{\"a}tze durch die Bildung von Summenparametern hilfreich. Das Prozessmodell wurde schrittweise validiert: Zun{\"a}chst wurde in Kaltversuchen ein Summenparameter, der u.a. die unbekannten Reibungsverh{\"a}ltnisse im Drehrohr ber{\"u}cksichtigt, durch Vergleich von Experiment und Rechnung f{\"u}r Sand ermittelt. F{\"u}r heterogene Abfallgemische kann dieser Materialfaktor zwar f{\"u}r Kaltversuche bestimmt werden (soweit dies f{\"u}r Abf{\"a}lle m{\"o}glich ist), im Heißbetrieb {\"a}ndern sich jedoch alle wesentlichen Stoffparameter wie Partikeldurchmesser, Sch{\"u}ttdichte und Sch{\"u}ttwinkel sowie die Reibungsverh{\"a}ltnisse. F{\"u}r diesen Fall wird der Materialfaktor zu Eins gesetzt und die wesentlichen Stoffgr{\"o}ßen umsatzabh{\"a}ngig modelliert. Dazu ist die Kenntnis der Sch{\"u}ttdichten, statischen Sch{\"u}ttwinkel und mittleren Partikeldurchmesser vom Abfall und Koks aus dem Abfall notwendig. Die mit diesen Stoffdaten berechnete Verweilzeit wurde in einem Heißversuch bei der Pyrolyse von Brennstoff aus M{\"u}ll- (BRAM) Pellets mit einem Fehler von ca. 20 \% erreicht. Das Basismodell wurde zun{\"a}chst ohne Umsatz an Messergebnisse mit Sand im Drehrohr unter Variation von Temperaturen und Massenstrom angepasst bevor mit diesem Modell die Pyrolyse von einem homogenen Einsatzstoff (Polyethylen mit Sand) im Drehrohr berechnet wurde. Hier konnte bereits gezeigt werden, dass mit diesem vereinfachten Modellansatz gute Ergebnisse beim Vergleich von Modell und Experiment erzielt werden k{\"o}nnen. Im n{\"a}chsten Schritt wurde der Sand angefeuchtet, um die Teilmodelle der Trocknung unterhalb und bei Siedetemperatur zu validieren. Die Mess- und Modellierungsergebnisse stimmen gut miteinander {\"u}berein. F{\"u}r ein Abfallgemisch aus BRAM-Pellets konnte der Verlauf der Solidtemperaturen unter der Ber{\"u}cksichtigung variabler Stoffwerte des Solids und eines Verschmutzungsfaktors, der den Belag des Drehrohres mit anklebendem Pellets bis zur Verkokung ber{\"u}cksichtigt, gut wiedergegeben werden. Die Gastemperaturen k{\"o}nnen in erster N{\"a}herung ausreichend genau durch das mathematische Modell beschrieben werden. Mit diesem vereinfachten mathematischen Modellansatz steht nun ein Hilfsmittel zur Auslegung und Optimierung von indirekt beheizten Drehrohren zur Verf{\"u}gung, um bei einem neuen Einsatzstoff mit Daten aus experimentellen Basisuntersuchungen, die Temperaturverl{\"a}ufe im Feststoff und Gas sowie die Gaszusammensetzung in Abh{\"a}ngigkeit der wesentlichen Einflussgr{\"o}ßen abzusch{\"a}tzen.}, subject = {Pyrolyse}, language = {de} } @article{HaefnerEckardtLutheretal., author = {H{\"a}fner, Stefan and Eckardt, Stefan and Luther, Torsten and K{\"o}nke, Carsten}, title = {Mesoscale modeling of concrete: Geometry and numerics}, series = {Computers and Structures}, journal = {Computers and Structures}, pages = {450 -- 461}, abstract = {Mesoscale modeling of concrete: Geometry and numerics}, subject = {Angewandte Mathematik}, language = {en} } @inproceedings{MusialUbyszUlatowski, author = {Musial, Michal and Ubysz, Andrzej and Ulatowski, Piotr}, title = {METHOD OF CALCULATION OF INTERNAL FORCES REDISTRIBUTION AND DISLOCATIONS IN REINFORCED CONCRETE BEAMS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2996}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29965}, pages = {8}, abstract = {The paper is a proposal of calculation of internal forces and dislocations in the reinforced concrete beams before and after cracking. For the ideally elastic bars transfer matrix proposed by Rakowski was applied. The effects associated with cracking were introduced by means of the Borcz's theory in the spectrally way. Numerical example was shown. The presented attitude also enables to calculate dynamic problems and those connected with the stability of the compressed and bending cracked beams and columns.}, subject = {Architektur }, language = {en} } @inproceedings{BartelsZimmermann, author = {Bartels, Jan-Hendrik and Zimmermann, J{\"u}rgen}, title = {MINIMIZING THE TOTAL DISCOUNTED COST OF DISMANTLING A NUCLEAR POWER PLANT}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2920}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29200}, pages = {9}, abstract = {Due to economical, technical or political reasons all over the world about 100 nuclear power plants have been disconnected until today. All these power stations are still waiting for their complete dismantling which, considering one reactor, causes cost of up to one Bil. Euros and lasts up to 15 years. In our contribution we present a resource-constrained project scheduling approach minimizing the total discounted cost of dismantling a nuclear power plant. A project of dismantling a nuclear power plant can be subdivided into a number of disassembling activities. The execution of these activities requires time and scarce resources like manpower, special equipment or storage facilities for the contaminated material arising from the dismantling. Moreover, we have to regard several minimum and maximum time lags (temporal constraints) between the start times of the different activities. Finally, each disassembling activity can be processed in two alternative execution modes, which lead to different disbursements and determine the resource requirements of the considered activity. The optimization problem is to determine a start time and an execution mode for each activity, such that the discounted cost of the project is minimum, and neither the temporal constraints are violated nor the activities' resource requirements exceed the availability of any scarce resource at any point in time. In our contribution we introduce an appropriate multi-mode project scheduling model with minimum and maximum time lags as well as renewable and cumulative resources for the described optimization problem. Furthermore, we show that the considered optimization problem is NP-hard in the strong sense. For small problem instances, optimal solutions can be gained from a relaxation based enumeration approach which is incorporated into a branch and bound algorithm. In order to be able to solve large problem instances, we also propose a truncated version of the devised branch and bound algorithm.}, subject = {Architektur }, language = {en} } @inproceedings{Klauer, author = {Klauer, Thomas}, title = {MOBILE FACILITY MANAGEMENT ZUR INSPEKTION UND INSTANDHALTUNG VON INGENIEURBAUWERKEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2975}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29759}, pages = {10}, abstract = {In diesem Beitrag wird eine mobile Software-Komponente zur Vor-Ort-Unterst{\"u}tzung von Bauwerkspr{\"u}fungen gem{\"a}ß DIN 1076 „Ingenieurbauwerke im Zuge von Strassen und Wegen, {\"U}berwachung und Pr{\"u}fung" vorgestellt, welche sich im praktischen Einsatz bei der Hochbahn AG Hamburg befindet. Mit Hilfe dieses Werkzeugs kann die Aktivit{\"a}t am Bauwerk in den gesamten softwaregest{\"u}tzten Gesch{\"a}ftsprozess der auwerksinstandhaltung integriert und somit die Bearbeitungszeit einer Bauwerkspr{\"u}fung von der Vorbereitung bis zur Pr{\"u}fbericht-Erstellung reduziert werden. Die Technologie des Mobile Computing wird unter Ber{\"u}cksichtigung spezieller fachlicher Randbedingungen, wie z.B. dem Einsatzort unter freiem Himmel, erl{\"a}utert und es werden Methoden zur effizienten Datenerfassung mit Stift und Sprache vorgestellt und bewertet. Ferner wird die Einschr{\"a}nkung der Hardware durch die geringere Gr{\"o}ße der Endger{\"a}te, die sich durch die Bedingung der Mobilit{\"a}t ergibt, untersucht.}, subject = {Architektur }, language = {de} } @inproceedings{BauerKandlerWeiss, author = {Bauer, Marek and Kandler, A. and Weiß, Hendrik}, title = {MODEL OF TRAM LINE OPERATION}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2921}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29217}, pages = {11}, abstract = {From passenger's perspective punctuality is one of the most important features of trams operations. Unfortunately in most cases this feature is only insufficiently fulfilled. In this paper we present a simulation model for trams operation with special focus on punctuality. The aim is to get a helpful tool for designing time-tables and for analyzing the effects by changing priorities for trams in traffic lights respectively the kind of track separation. A realization of trams operations is assumed to be a sequence of running times between successive stops and times spent by tram at the stops. In this paper the running time is modeled by the sum of its mean value and a zero-mean random variable. With the help of multiple regression we find out that the average running time is a function depending on the length of the sections and the number of intersections. The random component is modeled by a sum of two independent zero-mean random variables. One of these variables describes the disturbance caused by the process of waiting at an intersection and the other the disturbance caused by the process of driving. The time spent at a stop is assumed to be a random variable, too. Its distribution is estimated from given measurements of these stop times for different tram lines in Krak{\´o}w. Finally a special case of the introduced model is considered and numerical results are presented. This paper is involved with CIVITAS-CARAVEL project: "Clean and better transport in cites". The project has received research funding from the Community's Sixth Framework Programme. The paper reflects only the author's views and the Community is not liable for any use that may be made of the information contained therein.}, subject = {Architektur }, language = {en} } @inproceedings{WittwerBecker, author = {Wittwer, Christof and Becker, Rainer}, title = {MODELLBASIERTE ERTRAGSKONTROLLE F{\"U}R PV ANLAGEN IN VERNETZTEN GEB{\"A}UDEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3036}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30363}, pages = {5}, abstract = {Subject of the paper is the realisation of a model based efficiency control system for PV generators using a simulation model. A standard 2-diodes model of PV generator is base of the ColSim model, which is implemented in ANSI C code for flexible code exporting. The algorithm is based on discretisized U-I characteristics, which allows the calculation of string topologies witch parallel and serial PV cells and modules. Shadowing effects can be modelled down to cell configuration using polar horizon definitions. The simulation model was ported to a real time environment, to calculate the efficiency of a PV system. Embedded System technology allows the networked operation and the integration of standard I/O devices. Futher work focus on the adaption of shadowing routine, which will be adapted to get the environment conditions from the real operation.}, subject = {Architektur }, language = {de} } @inproceedings{RogożaStachonUbysz, author = {Rogoża, Agnieszka and Stachon, T. and Ubysz, Andrzej}, title = {MODELLING THE PLASTIC HINGE IN THE STATICALLY INDETERMINABLE REINFORCED CONCRETE BAR ELEMENTS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3005}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30050}, pages = {6}, abstract = {The paper presents the example numerical model to calculate the reinforced concrete bar structures. Usually applied methods of structure dimensioning do not include the case of plastic hinges occurrence under the limit load of construction. The model represented by A. Borcz is based on the differential equation of deflection line of the beam and it includes the effects of rearrangement of the internal forces and reological effects. The experimental parameters obtained in earlier investigations describe effects resulting from the rise of plastic hinges in the proposed equation.}, subject = {Architektur }, language = {en} } @misc{Kohout2006, author = {Kohout, Christian}, title = {Modelluntersuchungen zum HWS der Stadt D{\"o}beln / Freiberger Mulde}, doi = {10.25643/bauhaus-universitaet.792}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7922}, year = {2006}, abstract = {Die Arbeit beinhaltet die Planungsgrundlage (Modellgesetze)und Herstellung (Modellbau) eines physikalischen Modells eines Flußabschnittes in den Grenzen seiner hydraulischen Wirkung. Ziel der Untersuchungen ist die Ert{\"u}chtigung derim Modell dargestellten Hochwasserschutzanlagen unter vorgegebenen Auflagen. Es werden Modelluntersuchungen durchgef{\"u}hrt, die zur Erfassung der Wasserst{\"a}nde bei verschiedenen Durchfl{\"u}ssen dienen. Die daf{\"u}r eingesetzte Messtechnik wird dokumentiert. Die Messdaten werden hinsichtlich Messgenauigkeit und Messfehlerbehaftung untersucht, um die Ergebnisse im Vergleich mit einem numerischen Modell aufzubereiten.}, subject = {Hochwasserschutz}, language = {de} } @inproceedings{Geyer, author = {Geyer, Philipp}, title = {MODELS FOR MULTIDISCIPLINARY DESIGN OPTIMIZATION: AN EXEMPLARY OFFICE BUILDING}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2957}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29574}, pages = {10}, abstract = {The mathematical and technical foundations of optimization have been developed to a large extent. In the design of buildings, however, optimization is rarely applied because of insufficient adaptation of this method to the needs of building design. The use of design optimization requires the consideration of all relevant objectives in an interactive and multidisciplinary process. Disciplines such as structural, light, and thermal engineering, architecture, and economics impose various objectives on the design. A good solution calls for a compromise between these often contradictory objectives. This presentation outlines a method for the application of Multidisciplinary Design Optimization (MDO) as a tool for the designing of buildings. An optimization model is established considering the fact that in building design the non-numerical aspects are of major importance than in other engineering disciplines. A component-based decomposition enables the designer to manage the non-numerical aspects in an interactive design optimization process. A fa{\c{c}}ade example demonstrates a way how the different disciplines interact and how the components integrate the disciplines in one optimization model. In this grid-based fa{\c{c}}ade example, the materials switch between a discrete number of materials and construction types. For light and thermal engineering, architecture, and economics, analysis functions calculate the performance; utility functions serve as an important means for the evaluation since not every increase or decrease of a physical value improves the design. For experimental purposes, a genetic algorithm applied to the exemplary model demonstrates the use of optimization in this design case. A component-based representation first serves to manage non-numerical characteristics such as aesthetics. Furthermore, it complies with usual fabrication methods in building design and with object-oriented data handling in CAD. Therefore, components provide an important basis for an interactive MDO process in building design.}, subject = {Architektur }, language = {en} } @inproceedings{SeylerSchwarz, author = {Seyler, Steve and Schwarz, W.}, title = {MODERN PHOTOGRAMMETRY IN CIVIL ENGINEERING - EXAMPLES FOR MONITORING AND EVALUATION}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3019}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30192}, pages = {13}, abstract = {Monitoring und Bewertung sind Hauptaufgaben im Management bzw. der Revitalisierung von Bauwerken. Unterschiedliche Verfahren k{\"o}nnen bei der Akquisition der erforderlichen geometrischen Information, wie z. B. Gr{\"o}ße oder Verformung eines Geb{\"a}udes, eingesetzt werden. Da das Potenzial der digitalen Fotografie kontinuierlich w{\"a}chst, stellt die Industriephotogrammetrie heute eine bedeutende Alternative zu den klassischen Verfahren wie Dehnmessstreifen oder anderen taktilen Sensoren dar. Moderne Industriephotogrammetrie erfasst die Bilder mittels digitaler Systeme. Dies bedeutet, dass die Information digitaler Bilder mit Hilfe der digitalen Bildverarbeitung untersucht werden muss, um die Bildkoordinaten der Messpunkte zu erhalten. Eine der Aufgaben der Bildverarbeitung f{\"u}r photogrammetrische Zwecke besteht somit darin, den Mittelpunkt von kreisf{\"o}rmigen Marken zu lokalisieren. Die modernen Operatoren liefern Subpixelgenauigkeit f{\"u}r die Koordinaten des Punktes. Das optische Messverfahren der Industriephotogrammetrie erfordert hinsichtlich der Hardware in erster Linie hochaufl{\"o}sende digitale Kameras. Dabei lassen sich die Kameras in Videokameras, HighSpeed-Kameras, intelligente Kameras sowie so genannte Consumer und Professionelle Kameras unterscheiden. Die geometrische Aufl{\"o}sung digitaler HighEnd-Kameras liegt heute bei {\"u}ber 10 Megapixel. In punkto Datentransfer zum Rechner sind verschiedene Standards am Markt verf{\"u}gbar, z. B. USB2.0, GigE-Vision, CameraLink oder Firewire. Die Wahl des Standards h{\"a}ngt immer von der spezifischen Aufgabenstellung ab, da keine der Techniken eine f{\"u}hrende Position einnimmt. Die moderne Photogrammetrie bietet viele neue M{\"o}glichkeiten f{\"u}r das Monitoring und die Bewertung von Bauwerken. Sie kann ein-, zwei-, drei- oder vierdimensionale Informationen liefern, falls erforderlich auch in Echtzeit. Als ber{\"u}hrungsloses Messverfahren ist der Einsatz der Photogrammetrie noch m{\"o}glich, wenn die taktilen Sensoren z. B. aufgrund ihres Platzbedarfes nicht mehr eingesetzt werden k{\"o}nnen. Hochaufl{\"o}sende Videokameras erlauben es, selbst dynamische Untersuchungen mit großer Pr{\"a}zision durchzuf{\"u}hren.}, subject = {Architektur }, language = {de} } @inproceedings{Traversoni, author = {Traversoni, Leonardo}, title = {MOVEMENT DETECTION AND RECOGNITION WITH QUATERNION WAVELETS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3027}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30274}, pages = {8}, abstract = {We show how a Morlet type quaternion wavelet may be tuned to a pair of stereoscopic {\O}lms in order to detect moving objects and calculate its velocity shape volume and other characteristics. We show some practical examples of simple objects taken with normal pocket avi cameras.}, subject = {Architektur }, language = {en} } @inproceedings{HaefnerKoenke, author = {H{\"a}fner, Stefan and K{\"o}nke, Carsten}, title = {MULTIGRID PRECONDITIONED CONJUGATE GRADIENT METHOD IN THE MECHANICAL ANALYSIS OF HETEROGENEOUS SOLIDS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2962}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29626}, pages = {29}, abstract = {A fast solver method called the multigrid preconditioned conjugate gradient method is proposed for the mechanical analysis of heterogeneous materials on the mesoscale. Even small samples of a heterogeneous material such as concrete show a complex geometry of different phases. These materials can be modelled by projection onto a uniform, orthogonal grid of elements. As one major problem the possible resolution of the concrete specimen is generally restricted due to (a) computation times and even more critical (b) memory demand. Iterative solvers can be based on a local element-based formulation while orthogonal grids consist of geometrical identical elements. The element-based formulation is short and transparent, and therefore efficient in implementation. A variation of the material properties in elements or integration points is possible. The multigrid method is a fast iterative solver method, where ideally the computational effort only increases linear with problem size. This is an optimal property which is almost reached in the implementation presented here. In fact no other method is known which scales better than linear. Therefore the multigrid method gains in importance the larger the problem becomes. But for heterogeneous models with very large ratios of Young's moduli the multigrid method considerably slows down by a constant factor. Such large ratios occur in certain heterogeneous solids, as well as in the damage analysis of solids. As solution to this problem the multigrid preconditioned conjugate gradient method is proposed. A benchmark highlights the multigrid preconditioned conjugate gradient method as the method of choice for very large ratio's of Young's modulus. A proposed modified multigrid cycle shows good results, in the application as stand-alone solver or as preconditioner.}, subject = {Architektur }, language = {en} } @inproceedings{MelnikovSemenov, author = {Melnikov, B. E. and Semenov, Artem}, title = {MULTILEVEL COMPUTATION IN CIVIL ENGINEERING BASED ON MULTIMODEL ELASTO-PLASTIC ANALYSIS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2991}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29911}, pages = {11}, abstract = {Requires for reliability and durability of structures and their elements with simultaneous material economy have stimulated improvement of constitutive equations for description of elasto-plastic deformation processes. This has led to the development of phenomenological modelling of complex phenomena of irreversible deformation including history-dependent and rate-dependent effects. During the last several decades many works have been devoted to the development of elasto-plastic models, in order to better predict the material behavior under combined variable thermo-mechanical loading. The increase of accuracy of stress analysis and safety factors for complex structures with the help of modern finite-element packages (ABAQUS, ANSYS, COSMOS, LS-DYNA, MSC.MARC, MSC.NASTRAN, PERMAS and other) can be provided only by use of complex and special variants of plasticity theories, which are adequate for the considered loading conditions and based on authentic information about properties of materials. The areas of application of the various theories (models) are as a rule unknown to the users of finite-element packages at the existing variety loading condition sin machine-building designs. At the moment a universal theory of inelasticity is absent and even the most accomplished theories can not guarantee adequate description of deformation processes for arbitrary structure under wide range of loading programs. The classifier of materials, loading conditions, effects (phenomena) and list of basic experiments are developed by the authors. Use of these classifiers for an establishment of hierarchy of models is a first step for introduction of the multimodel analysis into computational practice. The set of the classic and modern inelasticity theories is considered, so that they are applicable for stress analysis of structures under complex loading programs. Among them there are plastic flow theories with linear and nonlinear isotropic and kinematic hardening, multisurface theories, endochronic theory, holonomic theory, rheologic models, theory of elasto-plastic processes, slip theory, physical theories (single crystal and polycrystalline models) and others. The classification of materials provides rearranging by a degree of homogeneous, chemical composition, level of strength and plasticity, behavior under cyclic loading, anisotropy of properties at initial condition, anisotropy of properties during deformation process, structural stability. The classification of loading conditions takes into consideration proportional and non-proportional loading, temperature range, combination of cyclic and monotonous loading, one-axial, two-axial and complex stress state, curvature of strain path, presence of stress concentrators and level of strain gradient. A unified general form of constitutive equations is presented for all used material models based upon the concept of internal state variables. The wide range of mentioned above inelastic material models has been implemented into finite element program PANTOCRATOR developed by authors (see for details www.pantocrator.narod.ru). Application possibility of different material models is considered both for material element and for complex structures subjected to complex non-proportional loading.}, subject = {Architektur }, language = {en} }