@inproceedings{SampaioHenriques2003,
  author    = {Sampaio, Alcinia Zita and Henriques, Pedro},
  title     = {Interactive project planning in construction based on virtual reality technology},
  doi       = {10.25643/bauhaus-universitaet.358},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3588},
  year      = {2003},
  abstract  = {This paper describes a didactic application that is part of a research project whose main aim is to develop a computer-aided system which will assist design and construction processes. It is based on the visual simulation of construction activities. Geometric modeling and virtual reality techniques are used in the visualization of the design process and to define user-friendly interfaces in order to access construction information, which could prove useful to Civil Engineering professionals. As a first step, was developed a prototype that serves as a didactic tool for Civil Engineering students of disciplines concerned with building construction. The construction of a double brick wall is the case studied. The wall is defined as a three dimensional model formed with the several components needed to edify it. Using the wall's virtual model it is possible to show, in an interactive way, the sequence of the construction process and observe from any point of view the configurations in detail of the building components. This is then a didactic tool application in construction processes domain of great interest to Civil Engineering students.},
  subject      = {Bauwesen},
  language  = {en}
}
@article{TakagiTaniKawamura2004,
  author    = {Takagi, Kousuke and Tani, Akinori and Kawamura, Hiroshi},
  title     = {Research on Intelligent Fuzzy Optimal Active and Hybrid Control Systems of Building Structures - Verification of Optimization Method on Switching Rules of Control Forces},
  doi       = {10.25643/bauhaus-universitaet.223},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2238},
  year      = {2004},
  abstract  = {Recently, many reseraches on active control systems of building structures are preformed based on modern control theory and are installed real buildings. The authors have already proposed intelligent fuzzy optimal active control (IFOAC) systems. IFOAC systems imitate intelligent activities of human brains such as prediction, adaptation, decision-kaking and so on. In IFOAC systems, objective and subjective judgements on the active control can be taken into account. However, IFOAC systems are considered to be suitable for far-field erathquake and control effect becomes small in case of near-field earthqaukes which include a few velosity pules with large amplitudes. To improve control effect in case of near-souece earthquakes, the authors have also proposed hybrid control (HC) systems, in which IFOAC systems and fuzzy control system are combined. In HC systems, the fuzzy control systems are introduced as a reflective fuzzy active control (RFAC) system and imitates spinal reflection of human. In HC systems, active control forces are activated to buildings in accordance with switching rules on active control forces. In this paper, optimizations on fuzzy control rules in RFAC system and switching rules of active control forces in HC system are performed by Parameter-Free Genetic Algorithms (PfGAs). Here, the optimization is performed by using different earthquake inputs. The results of digital simulations show that the HC system can reduce maximal response displacements under restrictions on strokes of the actuator effectively in case of a near-source earthquake and the effectiveness of the proposed HC system is discussed and clarified.},
  subject      = {Mehragentensystem},
  language  = {en}
}
@inproceedings{HaaseLangerMuehlhuber2003,
  author    = {Haase, Gundolf and Langer, Ulrich and M{\"u}hlhuber, Wolfram},
  title     = {Optimal Sizing and Shape Optimization in Structural Mechanics},
  doi       = {10.25643/bauhaus-universitaet.300},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3005},
  year      = {2003},
  abstract  = {We consider an industrial application consisting of the mass minimization of a frame in an injection moulding machine. This frame has to compensate the forces acting on the mould inside the machine and has to fulfill certain critical constraints. The deformation of that frame with constant thickness is described by the plain stress state equations for linear elasticity. If the thickness varies then we use a generalized plain stress state with constant thickness in the coarse grid elements. These direct problems are solved by an adaptive multigrid solver. The mass minimization problem leads to a constrained minimization problem for a non-linear functional which will be solved by some standard optimization algorithm which requires the gradients with respect to design parameters. For the shape optimization problem, we assume that the machine components consist of simple geometrical primitives determined by a few design parameters. Therefore, we calculate the gradient in the shape optimization by means of numerical differentiation which requires the solution of approximately 4 direct problems per design parameter. The adaptive solver guarantees the detection of critical regions automatically, and ensures a good approximation to the exact solution of the direct problem. This rather slow approach can be significantly accelerated by using the adjoint method to express the gradient. It will be combined with a direct implementation of several terms that appear after applying the chain rule to the gradient.},
  subject      = {Baustatik},
  language  = {en}
}
@article{KicingerArciszewskiDeJong2004,
  author    = {Kicinger, Rafal and Arciszewski, Tomasz and De Jong, Kenneth},
  title     = {Distributed Evolutionary Design: Island-Model-based Optimization of Steel Skeleton Structures in Tall Buildings},
  doi       = {10.25643/bauhaus-universitaet.219},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2195},
  year      = {2004},
  abstract  = {This paper presents results of a study on distributed, or parallel, evolutionary computation in the topological design of steel structural systems in tall buildings. It describes results of extensive experimental research on various parallel evolutionary architectures applied to a complex structural design problem. The experiments were conducted using Inventor 2003, a networkbased evolutionary design support tool developed at George Mason University. First, a general introduction to evolutionary computation is provided with an emphasis on recent developments in parallel evolutionary architectures. Next, a discussion of conceptual design of steel structural systems in tall buildings is presented. Further, Inventor 2003 is briefly introduced as well as its design representation and evolutionary computation characteristics. Next, the results obtained from systematic design experiments conducted with Inventor 2003 are discussed. The objective of these experiments was to qualitatively and quantitatively investigate evolution of steel structural systems in tall buildings during a distributed evolutionary design process as well as to compare efficiency and effectiveness of various parallel evolutionary architectures with the traditional evolutionary design approaches. Two connectivity topologies (ring topology and fully-connected topology) have been investigated for four populations of structural designs evolving in parallel and using various migration strategies. Also, results of the initial sensitivity studies are reported in which two ways of initializing distributed evolutionary design processes were investigated, using either arbitrarily selected designs as initial parents or randomly generated ones. Finally, initial research conclusions are presented.},
  subject      = {Mehragentensystem},
  language  = {en}
}
@inproceedings{RaueWeitzmann2004,
  author    = {Raue, Erich and Weitzmann, R{\"u}diger},
  title     = {Analysis and Design of Hybrid Structures using Optimization Strategies},
  doi       = {10.25643/bauhaus-universitaet.102},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1023},
  year      = {2004},
  abstract  = {The paper gives a general overview and concerns with a specified set of computer-aided analysis modules for hybrid structures loaded by extreme excitations. All problems are solved by methods of linear, quadratic or nonlinear mathematical optimization, that leads to very effective and economic design solutions. All approaches are derived from general optimization problem that can be easily altered to conform to specific design tasks. Some advantages and possibilities of hybrid structural modeling (single or mixed model-supported) are discussed. The methods will be illustrated by an example structure and optimization schemes.},
  subject      = {Konzipieren <Technik>},
  language  = {en}
}
@inproceedings{BrennigSanio2004,
  author    = {Brennig, Thomas and Sanio, Hans-Peter},
  title     = {New Methods of Computer Aided Optimization of Investment and Operating Costs for Buildings During Their Useful Life},
  doi       = {10.25643/bauhaus-universitaet.96},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-965},
  year      = {2004},
  abstract  = {Current software solutions for real estate planning, construction and use, do not model the complete life cycle of a building. Well-integrated software tools exist for the planning and construction phases. Data integrity exists throughout the planning and construction phases, but problems occur at the transition to the use-phase. At this interface, the complete data set of planning and execution gets lost. Another software deficiency is that current software solutions don't handle construction work and maintenance work equally. This is why a new software generation is demanded, which continuously covers the entire workflow process from the planning phase to the demolition of a building. New data concepts have to be developed, which allow bringing work items for construction together with work items for real estate use.},
  subject      = {Optimierung},
  language  = {en}
}
@article{BerkowskiBoron1997,
  author    = {Berkowski, P. and Boron, Jacek},
  title     = {An Algorithm of compromise structural Optimisation of Bar Structures},
  doi       = {10.25643/bauhaus-universitaet.526},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5264},
  year      = {1997},
  abstract  = {Authors' own research in applied unicriterial and multicriterial optimisation of bar structures, and also an analysis of accessible bibliography on structural synthesis allows to present herein an attempt to define a general algorithm for proceeding in formulation of a structural optimisation problem. A practical aspect of such an algorithm consists, in author's opinion, in enabling a designer a correct creation of a mathematical model of synthesis problems, independently of known mathematical methods employed to looking for an unconditional extremum of function of several variables. A proposed algorithm is not a ready-for-use tool for solving all the optimisation problems, but it constitutes an easy-to-expand theoretical basis. This basis should allow a designer to create a proper set of compromises on the way to construct a mathematical model of a specific optimisation problem. The algorithm, presented in the paper, is constructed as a sequence of the one-after-another problem questions, on which the designer answers: yes or no, and a set of selections from the knowledge base consisting of the elements of an optimisation problem components. The order of making questions adopted by the authors in the algorithm is subjective, however it is supported by their experience, both in applied optimisation and in designing of structures like trusses or frames.},
  subject      = {Stabwerk},
  language  = {en}
}
@inproceedings{GordienkoZhak2000,
  author    = {Gordienko, Boris I. and Zhak, S. V.},
  title     = {Die optimale Projektierung der metallverarbeitenden Betriebe},
  doi       = {10.25643/bauhaus-universitaet.583},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5832},
  year      = {2000},
  abstract  = {Es wird das gemeine Schema der Projektierung, die die Analyse des Marktes einschließt, betrachtet, die Einsch{\"a}tzung der Nomenklatur und des Umfanges des Produktionsausstoßes der Erzeugnisse, und die Schl{\"u}sselaufgabe der Wahl der Regimes der Bearbeitung. Die letzte Aufgabe wird - konkretisiert es werden die Formeln berichtet und die Algorithmen der Optimierung nach den Kriterien der Produktivit{\"a}t und den Selbstkostenpreisen. Es sind die Formeln f{\"u}r die Produktivit{\"a}t der Systeme mit der flexiblen Verbindung, pr{\"a}zisiert sowie die Abh{\"a}ngigkeiten f{\"u}r die Standhaftigkeit bei den kleinen Geschwindigkeiten des Schneidens. Die Schl{\"u}sselw{\"o}rter: der Markt, die Regimes der Bearbeitung, die Produktivit{\"a}t, der Selbstkostenpreis, die Optimierung},
  subject      = {Metall verarbeitende Industrie},
  language  = {de}
}
@article{GanevMarinov1997,
  author    = {Ganev, T. and Marinov, M.},
  title     = {Towards Optimal Designing of thin elastic Plates with a specific free Oscillations Frequency},
  doi       = {10.25643/bauhaus-universitaet.537},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5375},
  year      = {1997},
  abstract  = {Thin elastic plates are the basic constructional elements and are very often subjected to dynamic effects especially in the machine-building structures. Their saving design of resonance conditions of operation is an extremely complicated task which cannot be solved analytically. In the present report an efficient and sufficiently general method for optimal design of thin plates is worked out on the basis of energy resonance method of Wilder, the method of the finite elements for dynamic research and the methods of parameter optimization. By means of these methods various limitations and requirements put by the designer to the plates can be taken into account. A programme module for numerical investigation of the weight variation of the plate depending on the taken variable of the designed thickness at different supporting conditions is developed. The reasons for the considerable quantity and quality difference between the obtained optimal designs are also analysed.},
  subject      = {Platte},
  language  = {en}
}
@inproceedings{RaueDiener1997,
  author    = {Raue, Erich and Diener, J{\"o}rg},
  title     = {Numerische Analyse des Langzeitverhaltens hochbeanspruchter Druckglieder unter Ber{\"u}cksichtigung des nichtlinearen Kriechens mit Hilfe der quadratischen Optimierung},
  doi       = {10.25643/bauhaus-universitaet.441},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4415},
  year      = {1997},
  abstract  = {Bei der Berechnung von Stahlbeton- bzw. Spannbetonkonstruktionen m{\"u}ssen die Zusatzverformungen infolge Kriechen und Schwinden des Betons unter anderem dann ber{\"u}cksichtigt werden, wenn durch sie der Schnittgr{\"o}ßenzustand des Gesamttragwerks bzw. einzelner Tragwerksteile ung{\"u}nstig ver{\"a}ndert wird. Das trifft vor allem auf schlanke Druckglieder zu. Die Ermittlung der Kriechausmitte erfolgt im allgemeinen unter Zugrundelegung einer Kriechzahl, die vom Beanspruchungsniveau des Betons unabh{\"a}ngig ist. Diese Annahme ist unzul{\"a}ssig, wenn die Betonspannungen oberhalb des Gebrauchslastniveaus (>30..50\% der Druckfestigkeit) liegen, da in diesem Bereich die Kriechdehnungen {\"u}berproportional zu den kriecherzeugenden Spannungen anwachsen (nichtlineares Kriechen). Theoretische Untersuchungen zum Tragverhalten hochbeanspruchter Stahlbetonst{\"u}tzen unter Ber{\"u}cksichtigung des nichtlinearen Kriechens sind aufgrund der Komplexit{\"a}t des Problems und dem damit verbundenen Berechnungsaufwand gegenw{\"a}rtig in nur geringem Umfang vorhanden. Im vorliegenden Beitrag wird ein Algorithmus vorgestellt, bei dem die Ermittlung der Schnittgr{\"o}ßen und Deformationen auf die sukzessive L{\"o}sung quadratischer Optimierungsaufgaben f{\"u}r im voraus festgelegte Betrachtungszeitpunkte zur{\"u}ckgef{\"u}hrt wird, wobei die Ergebnisse der vorangegangenen Zeitpunkte Eingangswerte f{\"u}r die Berechnung darstellen. Die Ber{\"u}cksichtigung der Nichtlinearit{\"a}t des Kriechens unter hoher Spannung sowie geometrisch nichtlinearer Effekte erfolgt iterativ innerhalb jedes Betrachtungszeitpunkts. Mit der Einf{\"u}hrung von Spannungsbegrenzungen als zus{\"a}tzliche Nebenbedingungen k{\"o}nnen in jeder Iteration Materialplastizierungen, Rißbildungen des Betons bzw. >tension stiffening<-Effekte ohne prinzipielle Ver{\"a}nderung des mathematischen Modells ber{\"u}cksichtigt werden. Durch Nachrechnung von Langzeitversuchen an Stahlbetonst{\"u}tzen erfolgt die Verifikation des Berechnungsmodells},
  subject      = {Bauteil},
  language  = {de}
}