@article{StrukeljSkrinar1997, author = {Strukelj, A. and Skrinar, Matjaz}, title = {The Evaluation of the Dynamical Soil-Bridge Interaction}, doi = {10.25643/bauhaus-universitaet.539}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5397}, year = {1997}, abstract = {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.}, subject = {Boden-Bauwerk-Wechselwirkung}, language = {en} } @article{Strukelj1997, author = {Strukelj, A.}, title = {Some Problems in Obtaining the Green's Function of the Layered Soil}, doi = {10.25643/bauhaus-universitaet.538}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5388}, year = {1997}, abstract = {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}, subject = {Bodenmechanik}, language = {en} } @article{SteinmannHuebler1997, author = {Steinmann, Frank and H{\"u}bler, Reinhard}, title = {Vorgehensmodelle als Basis der Gestaltung durchgaengiger CAD-Systeme}, doi = {10.25643/bauhaus-universitaet.456}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4568}, year = {1997}, abstract = {F{\"u}r die Gestaltung einer durchg{\"a}ngigen Unterst{\"u}tzung des Entwurfsprozesses stehen gegenw{\"a}rtig deskriptive Modelle der Entwurfsobjekte im Mittelpunkt der Untersuchungen. Diese Modelle gestatten das Ableiten von Repr{\"a}sentationen 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 ber{\"u}cksichtigen nicht das WIE des eigentlichen modellkreierenden Schaffensprozesses. F{\"u}r ein echtes CADesign bildet dessen Kl{\"a}rung 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 {\"a}hnelt der, die in Form von Styleguides zur Gestaltung von 'Graphical User Interfaces' vorgeschlagen wird. Wesentliche praktische Benutzungen solche Basisaktivit{\"a}ten ergeben sich f{\"u}r: die Systematisierung computergest{\"u}tzter 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 leistungsf{\"a}higen UNDO- bzw. TMS-Mechanismen.}, subject = {CAD}, language = {de} } @article{Steinhage1997, author = {Steinhage, V.}, title = {Wissensbasierte Mustererkennung zur Erfassung von Baupl{\"a}nen}, doi = {10.25643/bauhaus-universitaet.488}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4881}, year = {1997}, abstract = {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}, subject = {Bauzeichnung}, language = {de} } @article{StaubFrench2004, author = {Staub-French, Sheryl}, title = {Feature-based Product Modeling for Building Construction}, doi = {10.25643/bauhaus-universitaet.233}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2331}, year = {2004}, abstract = {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.}, subject = {Produktmodell}, language = {en} } @article{SmarslyHartmannRueppeletal., author = {Smarsly, Kay and Hartmann, Timo and R{\"u}ppel, Uwe and K{\"o}nig, Markus}, title = {Positionspapier des Arbeitskreis Bauinformatik}, editor = {Smarsly, Kay}, doi = {10.25643/bauhaus-universitaet.3221}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170523-32219}, pages = {5}, abstract = {Die Bauinformatik ist eine S{\"a}ule der modernen Bau- und Umweltingenieurwissenschaften und befasst sich mit der Erforschung grundlegender informatorischer Methoden sowie mit der Anwendung und Weiterentwicklung der Informationswissenschaften im Bau- und Umweltbereich. Der Arbeitskreis Bauinformatik konstituiert sich aus Wissenschaftlern, die an Universit{\"a}ten im deutschsprachigen Raum auf dem Fachgebiet Bauinformatik lehren und forschen. Ausgehend vom erreichten Entwicklungsstand der Bauinformatik skizziert dieses Positionspapier die Aufgaben des Arbeitskreises und formuliert eine Grundlage f{\"u}r eine abgestimmte Weiterentwicklung an den deutschsprachigen Universit{\"a}ten.}, subject = {Bauinformatik}, language = {de} } @article{Skrinar1997, author = {Skrinar, Matjaz}, title = {Computation of Stresses and Settlements under an arbitrary Point in Homogenous, elastic, isotropic Half-Space, under the Load described by a uniform Load over a general quadrilateral}, doi = {10.25643/bauhaus-universitaet.533}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5338}, year = {1997}, abstract = {The problem of the computation of stresses and settlements in the half-space under various types of loads is often presented in geotechnical engineering. In 1885 Boussinesq advanced theoretical expressions to determine stresses at a point within an ideal mass. His equation considers a point load on the surface of a semi-infinite, homogeneous, isotropic, weightless, elastic half-space. Newmark in 1942 performed the integration of Boussinesq's equations for the vertical stress under a corner of a rectangular area loaded with a uniform load. The problem of the determination of vertical stresses under a rectangular shaped footing has been satisfactorily solved with renewal integration of the Boussinesq's equation over the arbitrary rectangle on surface of the half-space, with a non-uniform load represented with piecewise linear interpolation functions. The problem of the determination of stresses in the case when the footing shape is an arbitrary quadrilateral however remains unsolved. The paper discusses an approach to the computation of vertical stresses and settlements in an arbitrary point of the half-space, loaded with a uniform load, which shape in the ground plan can be a general four noded form with straight edges. Since the form is transformed into a biunit square and all integrations are performed over this area, all solutions are valid also for an arbitrary triangle by the implementation of the degeneration rule.}, subject = {Halbraum}, language = {en} } @article{ShihLee2004, author = {Shih, Naai-Jung and Lee, Wen-Pang}, title = {Particle Simulation and Evaluation of Personal Exposure to Contaminant Sources in an Elevation Space}, doi = {10.25643/bauhaus-universitaet.237}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2376}, year = {2004}, abstract = {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.}, subject = {Produktmodell}, language = {en} } @article{SemenovBazhanMorozov2004, author = {Semenov, Vitaly and Bazhan, Andrew and Morozov, Sergey}, title = {Distributed STEP-Compliant Platform for Multimodal Collaboration in Architecture, Engineering, and Construction}, doi = {10.25643/bauhaus-universitaet.261}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2616}, year = {2004}, abstract = {This paper presents an innovative software platform OpenSTEP intended to build advanced distributed integrated systems and to conduct multidisciplinary collaborative projects in both academy and industry. The paper discusses an open system architecture, methodology, component library and CASE toolkit enabling the developers to build a wide range of interoperable applications and systems compliant with STEP and, particularly, with IFC becoming the increasingly important standard for information integration in architecture, engineering and construction.}, subject = {Framework }, language = {en} } @article{SemenovAlekseevaTarlapan2004, author = {Semenov, Vitaly and Alekseeva, Elena and Tarlapan, Oleg}, title = {Virtual Construction using Map-based Approach}, doi = {10.25643/bauhaus-universitaet.244}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2447}, year = {2004}, abstract = {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...}, subject = {Produktmodell}, language = {en} }