TY - JOUR A1 - Volkova, Viktorija T1 - The analysis of dynamic behaviour of pre-stressed systems under polyharmonic excitations N2 - Pre-stressed structural elements are widely used in large-span structures. As a rule, they have higher stiffness characteristics. Pre-stressed rods can be applied as girders of different purpose, and as their separate parts, e.g. rods of trusses and frames. Among numerous ways of prestressing the compression of girders, trusses, and frames by tightenings from high-strength materials is under common application. KW - Verkehrsplanung KW - Simulation KW - Baukonstruktion KW - Dynamische Belastung KW - Tragwerk / Vorspannung KW - Vorgespannte Konstruktion Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2656 ER - TY - JOUR A1 - Vogel, Manfred A1 - Breit, Manfred A1 - Märki, Fabian T1 - Optimization of 4D Process Planning using Genetic Algorithms N2 - The presented work focuses on the presentation of a discrete event simulator which can be used for automated sequencing and optimization of building processes. The sequencing is based on the commonly used component–activity–resource relations taking structural and process constraints into account. For the optimization a genetic algorithm approach was developed, implemented and successfully applied to several real life steel constructions. In this contribution we discuss the application of the discrete event simulator including its optimization capabilities on a 4D process model of a steel structure of an automobile recycling facility. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Genetischer Algorithmus Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2360 ER - TY - JOUR A1 - van Treeck, Christoph A1 - Rank, Ernst T1 - Analysis of building structure and topology based on Graph Theory N2 - Individual views on a building product of people involved in the design process imply different models for planning and calculation. In order to interpret these geometrical, topological and semantical data of a building model we identify a structural component graph, a graph of room faces, a room graph and a relational object graph as aids and we explain algorithms to derive these relations. The application of the technique presented is demonstrated by the analysis and discretization of a sample model in the scope of building energy simulation. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Graphentheorie KW - Ingenieurbau Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2308 ER - TY - JOUR A1 - Staub-French, Sheryl T1 - Feature-based Product Modeling for Building Construction N2 - Current building product models explicitly represent components, attributes of components, and relationships between components. These designer-focused product models, however, do not represent many of the design conditions that are important for construction, such as component similarity, uniformity, and penetrations. Current design and construction tools offer limited support for detecting these construction-specific design conditions. This paper describes the ontology we developed using the manufacturing concept of features to represent the design conditions that are important for construction. The feature ontology provides the blueprint for the additions and changes needed to transform a standard product model into a constructionspecific product model. The ontology formalizes three classes of features, defines the attributes and functions of each feature type, and represents the relationships between features explicitly. The descriptive semantics of the ontology allows practitioners to represent their varied preferences for naming features, specifying features that result from component intersections and the similarity of components, and grouping features that affect a specific construction domain. A software prototype that implements the ontology enables practitioners to transform designer-focused product models into feature-based product models that represent the construction perspective. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Baukonstruktion KW - Modellierung Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2331 ER - TY - JOUR A1 - Shih, Naai-Jung A1 - Lee, Wen-Pang T1 - Particle Simulation and Evaluation of Personal Exposure to Contaminant Sources in an Elevation Space N2 - An elevator, which figures a small volume, is normally used by everyone for a short period of time and equipped with simple ventilation system..Any contaminant released within it may cause serious problem. This research adapt a fire and smoke simulation software (FDS) into non-fire indoor airflow scario. Differently from previous research, particles are chosen as a risk evalution unit. A personal and multi-personal exposure model is proposed. The model takes the influence of the human thermal boundary, coughing, inhalation, exhalation, standing position, and the fan factor into account. The model is easy-to-use and suitable for the design of elevator system in practice. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Luft KW - Schadstoffkonzentration Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2376 ER - TY - JOUR A1 - Semenov, Vitaly A1 - Alekseeva, Elena A1 - Tarlapan, Oleg T1 - Virtual Construction using Map-based Approach N2 - The paper presents a general map-based approach to prototyping of products in virtual reality environments. Virtual prototyping of products is considered as a consistent simulation and visualization process mapping the source product model into its target visual representations. The approach enables to interrelate formally the product and visual information models with each other by defining mapping rules, to specify a prototyping scenario as a composition of map instances, and then to explore particular product models in virtual reality environments by interpreting the composed scenario. Having been realized, the proposed approach provides for the strongly formalized method and the common software framework to build virtual prototyping applications. As a result, the applications gain in expressiveness, reusability and reliability, as well as take on additional runtime flexibility... KW - Produktmodell KW - Simulation KW - Bautechnik KW - Virtuelle Realität KW - Bauwerk Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2447 ER - TY - JOUR A1 - Rose, Martin T1 - Modeling of Freeway Traffic N2 - An integrated modeling of freeway traffic is developed, whose implementation in an uniform computer –aided simulation model facilitate comparative evaluation and systematic coupling of several traffic simulations, traffic controls, traffic measurements and traffic scenarios. The integrated modeling of freeway traffic is a basic mapping of freeway networks, control methods, measurements and different simulations of traffic flow... KW - Verkehrsplanung KW - Simulation KW - Autobahn Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2639 ER - TY - JOUR A1 - Romberg, Richard A1 - Niggl, Andreas A1 - van Treeck, Christoph T1 - Structural Analysis based on the Product Model Standard IFC N2 - In this paper we present a computer aided method supporting co-operation between different project partners, such as architects and engineers, on the basis of strictly three-dimensional models. The center of our software architecture is a product model, described by the Industry Foundation Classes (IFC) of the International Alliance for Interoperability (IAI). From this a geometrical model is extracted and automatically transferred to a computational model serving as a basis for various simulation tasks. In this paper the focus is set on the advantage of the fully three-dimensional structural analysis performed by p-version of the finite element analysis. Other simulation methods are discussed in a separate contribution of this Volume (Treeck 2004). The validity of this approach will be shown in a complex example. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Statik KW - Standard Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2433 ER - TY - JOUR A1 - Osada, Teppei A1 - Koike, Hirotaka A1 - Morimoto, Akinori T1 - Research on Establishment of a Standard of Traffic Impact Assessment with Integrated Database System N2 - Planning support systems, such as geographical information system (GIS) and traffic flow simulation models, are widely in use in recent urban planning research. In this paper we propose a method to apply traffic impact assessment (TIA) to large-scale, commercial developments. In TIA research we often encounter the problem of increasing amount of data that is necessary for detailed investigation and analysis, as the scale of commercial developments become larger and more complex. As a result, TIA presents two problems. The first problem is the difficulty of data acquisition. The second problem is the reliability of data. As a solution, we developed an integrated database system. KW - Verkehrsplanung KW - Simulation KW - Datenbanksystem Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2647 ER - TY - JOUR A1 - Neuberg, Frank A1 - Fank, Ernst A1 - Ekkerlein, Christian T1 - Integrated Life Cycle Simulation and Assessment of Buildings N2 - Buildings require both for construction and, due to their comparatively long life cycle for maintenance, significant raw material and energy resources. So far available knowledge about resource consumption during an entire life cycle of a building is still quite rare, because various criteria affect each other and/or overlay mutually. In this contribution a model based software concept is presented using an integrated approach for life cycle simulation and assessment of buildings. The essential point of the development consists of connecting an IFC compliant product model of a building via the Internet with data bases for the resource and energy requirement of building materials. Furthermore, numerical simulations allow calculating and minimizing the energy consumption, the resource requirement, the waste streams and also the noxious emissions. In the context of this paper we present the first release of software programs for architects and engineers, which help them to evaluate their design decisions objectively in early planning steps. Additionally the usage of the software is demonstrated by a test case study for a real world building. By applying this software in practice a substantial contribution for saving energy and natural resources can be provided in the sense of sustainable and ecological building design. KW - Produktmodell KW - Simulation KW - Bautechnik KW - Lebenszyklus Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2351 ER -