Refine
Document Type
- Article (67)
- Conference Proceeding (38)
- Doctoral Thesis (1)
Institute
- Professur Informatik im Bauwesen (106) (remove)
Keywords
- CAD (17)
- Modellierung (14)
- Finite-Elemente-Methode (11)
- Bauwerk (10)
- Tragwerk (8)
- Nichtlineares Phänomen (6)
- Optimierung (6)
- Schale (6)
- Architektur (5)
- Bauwesen (5)
- Dreidimensionales Modell (5)
- Objektmodell (5)
- Computerunterstütztes Verfahren (4)
- Baustatik (3)
- Bauteil (3)
- Bauzeichnung (3)
- Datenaustausch (3)
- Datenmodell (3)
- Dynamische Belastung (3)
- Elastoplastizität (3)
- Langzeitverhalten (3)
- Stadtplanung (3)
- Stahlbeton (3)
- Stochastisches Modell (3)
- Öffentlicher Personennahverkehr (3)
- Anwendung (2)
- Bauablauf (2)
- Bauausführung (2)
- Bauentwurf (2)
- Bauplanung (2)
- Bauschaden (2)
- Datenbank (2)
- Dialogsystem (2)
- Diskrete Optimierung (2)
- Facility-Management (2)
- Festkörpermechanik (2)
- Freie Schwingung (2)
- Fuzzy-Logik (2)
- Geschichtetes Medium (2)
- Gleichgewicht (2)
- Graphentheorie (2)
- Informationsmanagement (2)
- Ingenieurbau (2)
- Instandhaltung (2)
- Internet (2)
- Lernendes System (2)
- Mathematisches Modell (2)
- Orthotropes Bauteil (2)
- Projektmanagement (2)
- Prozessmodell (2)
- Rissbildung (2)
- Stabilität (2)
- Standardisierung (2)
- Umweltfaktor (2)
- Verkehrsnetz (2)
- Virtuelle Realität (2)
- Visualisierung (2)
- Zeitabhängigkeit (2)
- Zuverlässigkeit (2)
- Ablaufplanung (1)
- Anpassung (1)
- Balken (1)
- Bauaufnahme (1)
- Bauzustand (1)
- Belastung (1)
- Beleuchtung (1)
- Beltrami-Gleichung (1)
- Beschränkung (1)
- Betriebswirtschaft (1)
- Beulung (1)
- Bewertung (1)
- Biegemoment (1)
- Bildanalyse (1)
- Boden-Bauwerk-Wechselwirkung (1)
- Bodenmechanik (1)
- Bogenstaumauer (1)
- Bruchmechanik (1)
- Brücke (1)
- Computer Supported Cooperative Work (1)
- Computergraphik (1)
- Datenbankverwaltung (1)
- Dickwandiges Bauelement (1)
- Druckbelastung (1)
- Eigenwert (1)
- Elastomer (1)
- Ellipsoid (1)
- Entscheidung bei mehrfacher Zielsetzung (1)
- Entscheidungsunterstützungssystem (1)
- Entwurf (1)
- Erdbebenbelastung (1)
- Fallbasiertes Schließen (1)
- Finite-Streifen (1)
- Fraktal (1)
- Gebäude (1)
- Gebäudeleittechnik (1)
- Geotechnik (1)
- Gittererzeugung (1)
- Green-Funktion (1)
- Grenzlast (1)
- Grenzzustand (1)
- Halbraum (1)
- Heuristik (1)
- Informatik (1)
- Ingenieurholzbau (1)
- Integrierte Planung (1)
- Isotropie (1)
- Kartierung (1)
- Kennzahl (1)
- Knowledge modelling (1)
- Kriechen (1)
- Künstliche Intelligenz (1)
- Mehrdimensionalität (1)
- Mustererkennung (1)
- Netzplantechnik (1)
- Numerisches Verfahren (1)
- Objektorientiertes Datenbanksystem (1)
- Operations Research (1)
- Parameteridentifikation (1)
- Petri-Netz (1)
- Pflasterungen (Mathematik) (1)
- Photogrammetrie (1)
- Plastizitätstheorie (1)
- Platte (1)
- Problemlösen (1)
- Produktinformation (1)
- Produktmodell (1)
- Programm (1)
- Projektdokumentation (1)
- Projektsteuerung (1)
- Prozessmanagement (1)
- Quantenphysik (1)
- Quaternion (1)
- Rekonstruktion (1)
- Ressourcenallokation (1)
- Sandwichbauweise (1)
- Setzung (1)
- Sicherheit (1)
- Spannender Baum (1)
- Spannung (1)
- Stabwerk (1)
- Stadtverkehr (1)
- Stahlbau (1)
- Stahlkonstruktion (1)
- Stapelproblem (1)
- Stoffgesetz (1)
- Stokes-Problem (1)
- Straße (1)
- Strukturanalyse (1)
- Strukturvergleich (1)
- Synchronisierung (1)
- Temperatur (1)
- Theorie zweiter Ordnung (1)
- Trajektorie (Mathematik) (1)
- Transportproblem (1)
- Trägheit (1)
- Vektorfunktion (1)
- Verbundtragwerk (1)
- Verkehrsaufkommen (1)
- Verkehrsmittelwahl (1)
- Versorgungsnetz (1)
- Verteiltes Datenverarbeitungssystem (1)
- Viskoplastizität (1)
- Vorspannung (1)
- Wartezeit (1)
- Wechselwirkung (1)
- Windlast (1)
- Wirtschaftlichkeit (1)
- Wissensmodellierung (1)
- Zufallsvariable (1)
- Zuverlässigkeitstheorie (1)
- adaption (1)
- comparison of structure (1)
Year of publication
- 1997 (106) (remove)
Anhand von Ergebnissen aus dem FABEL-Projekt wird gezeigt, welche Beiträge Methoden der Künstlichen Intelligenz, insbesondere der Wissensverarbeitung beim Entwurf komplexer Gebäude leisten können. Exemplarisch werden spezialisierte wissensintensive Methoden, und allgemeine fallbasierte Methoden zum Retrieval und zur Wiederverwendung früherer Entwürfe vorgestellt. Es werden Fragen der Integration von Wissen, Fällen und Daten diskutiert. Der Prototyp des FABEL-Projekts verwendet die Metapher der virtuellen Baustelle, um die verschiedenen Methoden als Planungswerkzeuge in einem CAD-System integriert anzubieten. Ein Planungsmodell dient der zusätzlichen Orientierung des Planers. Die Ergebnisse sind interessant für den Entwurf komplexer Unikate, dürften aber auch als Zusatz zu elektronisch angebotenen Katalogen relevant sein.
Renovation's peculiarities of industrial enterprises in conditions of economic selfsufficiency
(1997)
Probleme of recrienfation of building complex, to the sharp increase of share of reconstruction works, capital repair and modernisation of in-dustrial plants are concidered in this work. The conception of develop-ment and creation of unitified system of expluatation and renovation of industrial plants are worded out. This system is based on date-computer technology and taking into conciderations of real economic relations.
The theory of random matrices, or random matrix theory, RMT in what follows, has been developed at the beginning of the fties to describe the sta- tistical properties of energy levels of complex quantum systems, [1], [2], [3]. In the early eighties it has enjoyed renewed interest since it has been recognized as a very useful tool in the study of numerous physical systems. Specically, it is very useful in the analysis of chaotic quantum systems. In fact, in the last years many papers appeared about the problem of quantum chaos which implies the quantization of systems whose underlying classical dynamics is irregular (i.e. chaotic). The simplest models considered in this eld are billi- ards of various shapes. From the the classical point of view, a point particle in a 2-dimensional billiard displays regular or irregular motion depending on the shape of the billiard; for instance motion in a rectangular or circular billi- ard is regular thanks to the symmetries of the boundary. On the other hand, billiards of arbitrary shapes imply chaotic motion, i.e. exponential diver- gence of initially nearby trajectories. In order to study quantum billiards we have to consider the Schroedinger equation in various 2-dimensional domains. The eigenvalues of the Schroedinger equation represent the allowed energy levels of our quantum particle in the billiard under consideration, while the eigenfunction norms represent the probability density of nding the particle in a certain position. The question of quantum chaos is whether the charac- ter of the classical motion (regular or chaotic) can in uence some properties
Methods with the convergence order p 2 (Newton`s, tangent hyperbolas, tangent parabolas etc.) and their approximate variants are studied. Conditions are presented under which the approximate variants preserve their convergence rate intrinsic to these methods and some computational aspects (possibilities to organize parallel computation, globalization of a method, the solution of the linear equations versus the matrix inversion at every iteration etc.) are discussed. Polyalgorithmic computational schemes (hybrid methods) combining the best features of various methods are developed and possibilities of their application to numerical solution of two-point boundary-value problem in ordinary differential equations and decomposition-coordination problem in convex programming are analyzed.
In der vorliegenden Arbeit werden dickwandige Schalentragwerke unter statischen Belastungen betrachtet. Die Schale besteht aus verschiedenen Zonen und in jeder Zone wird die Schalenmittelflaeche mittels eines eigenen Geometriegleichungssystems definiert. Das Verzerrungsfeld hat allen 6 unabhaengigen Komponenten unter der Annahme, dass die Querschnittsfasern, die normal zu der Mittelflaeche der unbelasteten Schale sind, geradelinig bleiben. Ein dreidimensionales isoparametrisches finites Element wird vorgeschlagen. Die Berechnung wird mit der Hilfe der Makroelemententechnik durchgefuehrt. In der Arbeit werden die wesentliche Parameter der Schalengeometrie, sowie auch entsprechendes Anteil von Klassen des konstruktiven Modells, definiert. Ein konstruktives Informationsmodell und ein FEM-Informationsmodell, werden entwickelt. Die Informationsverbindungen zwischen den beiden Modellen werden definiert. Diese objektorientierten Modelle werden in Programmiersprache Microsoft Visual C++ v.4.0 unter Windows 95 implementiert. Als numerisches Beispiel wird ein Bogenmauertragwerk betrachtet.
In the abstract proposed is the Instrumental System of mechanics problems analysis of the deformed solid body. It supplies the researcher with the possibility to describe the input data on the object under analyses and the problem scheme based upon the variational principles within one task. The particular feature of System is possibility to describe the information concerning the object of any geometrical shape and the computation sheme according to the program defined for purpose. The Methods allow to compute the tasks with indefinite functional and indefinite geometry of the object (or the set of objects). The System provides the possibility to compute the tasks with indefinite sheme based upon the Finite Element Method (FEM). The restrictions of the System usage are therefore determined by the restrictions of the FEM itself. It contrast to other known programms using FEM (ANSYS, LS-DYNA and etc) described system possesses more universality in defining input data and choosing computational scheme. Builtin is an original Subsytem of Numerical Result Analuses. It possesses the possibility to visualise all numerical results, build the epures of the unknown variables, etc. The Subsystem is approved while solving two- and three-dimensional problems of Elasticiti and Plasticity, under the conditions of Geometrical Unlinearity. Discused are Contact Problems of Statics and Dynamics.
In the design of a structure, the implementation of reliable soil-foundation-structure interaction into the analysis process plays a very important role. The paper presents a determination of parameters of a suitably chosen soil-foundation model and their influence on the structure response. Since the mechanical data for the structure can be determined with satisfactory accuracy, the properties of the soil-foundation model were identified using measured dynamic response of the real structure. A simple model describing soil-foundation structure was incorporated into the classical 3-D finite element analysis of the structure with commercial software. Results obtained from the measured data on the pier were afterwards compared with those obtained with the finite model of the pier-foundation-soil structure. On the basis of this comparison the coefficients describing the properties in the soil-foundation model were adjusted until the calculated dynamic response coincided with the measured ones. In this way, the difference between both results was reduced to 1%. Full-scale tests measuring eigenmotion of the bridge were performed through all erection stages of the new bridge in Maribor. In this way an effective and experimentally verified 3-D model for a complex dynamic analysis of the bridge under the earthquake loading was obtained. The significant advantage of the obtained model is that it was updated on the basis of the dynamic measurements thus improving the model on the basis of in-situ geomechanical measurements. The model is very accurate in describing the upper structure and economical in describing the soil mass thus representing an optimal solution regarding computational efforts.
The frame of this paper is the development of methods and procedures for the description of the motion of an arbitrary shaped foundation. Since the infinite half-space cannot be properly described by a model of finite dimensions without violating the radiation condition, the basic problems are infinite dimensions of the half-space as well as its non-homogeneous nature. Consequently, an approach has been investigated to solve this problem indirectly by developing Green's function in which the non-homogeneity and the infiniteness of the half-space has been included. When the Green's function is known, the next step will be the evaluation of contact stresses acting between the foundation and the surface of the half-space through an integral equation. The equation should be solved in the area of the foundation using Green's function as the kernel. The derivation of three-dimensional Green's function for the homogeneous half-space (Kobayashi and Sasaki 1991) has been made using the potential method. Partial differential equations occurring in the problem have been made ordinary ones through the Hankel integral transform. The general idea for obtaining the three-dimensional Green's function for the layered half-space is similar. But in that case some additional phenomena may occur. One of them is the possibility of the appearance of Stonely surface waves propagating along the contact surfaces of layers. Their contribution to the final result is in most cases important enough that they should not be neglected. The main advantage of results presented in comparing to other obtained with numerical methods is their accuracy especially in the case of thin layers because all essential steps of Green's function evaluation except of the contour integration along the branch cut have been made analytically. On the other hand the disadvantage of this method is that the mathematical effort for obtaining the Green's function is increasing drastically with the increase of the number of layers. Future work will therefore be directed in simplifying of the above described process
Für die Gestaltung einer durchgängigen Unterstützung des Entwurfsprozesses stehen gegenwärtig deskriptive Modelle der Entwurfsobjekte im Mittelpunkt der Untersuchungen. Diese Modelle gestatten das Ableiten von Repräsentationen sowie eine Weitergabe von Entwurfsergebnissen. Pragmatische Gliederungen des Entwurfsprozesses unterteilen diesen nach organisatorischen und betriebswirtschaftlichen Aspekten (Planbarkeit und Abrechenbarkeit) in eine Sequenz von Entwurfsphasen (HOAI). Diese Gliederungen berücksichtigen nicht das WIE des eigentlichen modellkreierenden Schaffensprozesses. Für ein echtes CADesign bildet dessen Klärung jedoch die erforderliche Voraussetzung. Im Beitrag wird dazu von einem vereinheitlichten Set generischer Entwurfsaktionen ausgegangen. Auch dann, wenn die verschiedenen Entwurfsphasen und die Entwurfshandlungen der einzelnen Ingenieurgewerke mit spezifische Entwurfsmodellen verbunden werden, besteht damit eine Grundlage zur methodischen Fundierung entsprechender CAD-Tools. Die methodische Verfahrensweise ähnelt der, die in Form von Styleguides zur Gestaltung von 'Graphical User Interfaces' vorgeschlagen wird. Wesentliche praktische Benutzungen solche Basisaktivitäten ergeben sich für: die Systematisierung computergestützter Entwurfshandlungen, insbesondere durch Erweiterung des deskriptiven um ein operationales Modell sowie deren erweiterte Interpretierbarkeit die Erzeugung wissensbasierter Werkzeuge zur automatischen Modellgenerierung/-konfiguration die Implementation von leistungsfähigen UNDO- bzw. TMS-Mechanismen.
Due to technological progress and European standardization (e.g. ISO certification) there is an increasing demand to automate the digital recording of building plans. Currently there are two approaches available: (1) labour-intensive redrawing with digitizing tablets or by screen digitizing, (2) automatic scanning and vectorizing where vectorization generally demands an interactive follow-up treatment due to incomplete or ambigues results. This paper proposes a knowledge-based approach for building plan analysis. The procedure reveals the following processing steps: scanning of the building plan, enhancing the image quality and binarization, extraction of lines, line junctions and character fields, knowledge-based interpretation and grouping of image features to domain specific feature aggregates like door symbols, stair symbols etc., optical character recognition and lexicon-based interpretation of character fields, matching of feature aggregates with dimension sets. First results of a prototype implementation are presented. At last an extension of the approach towards a semantic modeling concept showing a coupling between 3D object modeling and an explict 2D modeling of images and technical drawings is presented