@inproceedings{O'BrienDansoAmoakoIssa2004, author = {O'Brien, William and Danso-Amoako, Mark and Issa, Raja}, title = {A Case Study of IFC and CIS/2 Support for Steel Supply Chain Processes}, doi = {10.25643/bauhaus-universitaet.119}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1195}, year = {2004}, abstract = {The evolution of data exchange and integration standards within the Architectural, Engineering and Construction industry is gradually making the long-held vision of computer-integratedconstruction a reality. The Industry Foundations Classes and CIMSteel Integration Standards are two such standards that have seen remarkable successes over the past few years. Despite successes, these standards support the exchange of product data more than they do process data, especially those processes that are loosely coupled with product models. This paper reports on on-going research to evaluate the adequacy of the IFC and CIS/2 standards to support process modeling in the steel supply chain. Some initial recommendations are made regarding enhancements to the data standards to better support processes.}, subject = {Bauwerk}, language = {en} } @inproceedings{SchapkeScherer2004, author = {Schapke, Sven-Eric and Scherer, Raimar J.}, title = {A Four Layer Bayesian Network for Product Model Based Information Mining}, doi = {10.25643/bauhaus-universitaet.120}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1207}, year = {2004}, abstract = {Business and engineering knowledge in AEC/FM is captured mainly implicitly in project and corporate document repositories. Even with the increasing integration of model-based systems with project information spaces, a large percentage of the information exchange will further on rely on isolated and rather poorly structured text documents. In this paper we propose an approach enabling the use of product model data as a primary source of engineering knowledge to support information externalisation from relevant construction documents, to provide for domain-specific information retrieval, and to help in re-organising and re-contextualising documents in accordance to the user's discipline-specific tasks and information needs. Suggested is a retrieval and mining framework combining methods for analysing text documents, filtering product models and reasoning on Bayesian networks to explicitly represent the content of text repositories in personalisable semantic content networks. We describe the proposed basic network that can be realised on short-term using minimal product model information as well as various extensions towards a full-fledged added value integration of document-based and model-based information.}, subject = {Bauwerk}, language = {en} } @inproceedings{BedardMoraRivard2004, author = {B{\´e}dard, Claude and Mora, Rodrigo and Rivard, Hugues}, title = {A Framework for Computer-Aided Conceptual Design of Building Structures}, doi = {10.25643/bauhaus-universitaet.101}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1018}, year = {2004}, abstract = {This paper describes a framework for computer-aided conceptual design of building structures that results from building architectural considerations. The central task that is carried out during conceptual design is the synthesis of the structural system. This paper proposes a methodology for the synthesis of structural solutions. Given the nature of architectural constraints, user-model interactivity is devised as the most suitable computer methodology for driving the structural synthesis process. Taking advantage of the hierarchical organization of the structural system, this research proposes a top-down approach for structural synthesis. Through hierarchical refinement, the approach lends itself to the synthesis of global and local structural solutions. The components required for implementing the proposed methodology are briefly described. The main components have been incorporated in a proof-of-concept prototype that is being tested and validated with actual buildings.}, subject = {Konzipieren }, language = {en} } @inproceedings{BothKohlerGessmann2004, author = {Both, Petra von and Kohler, Niklaus and Gessmann, Robin}, title = {A virtual life cycle structured platform for building applications}, doi = {10.25643/bauhaus-universitaet.121}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1219}, year = {2004}, abstract = {The development of a life cycle structured cooperation platform is described, which is based on an integrated process and goal-oriented project model. Furthermore the structure of a life cycle oriented object structure model and its implementation in the platform are documented. The complete conceptual model is described, which represents the basis of a lifecycle -oriented structuring of the planning object and supports the thematic classification of the object and project management data.}, subject = {Bauwerk}, language = {en} } @inproceedings{MaWongYang2004, author = {Ma, Zhiliang and Wong, K. D. and Yang, Jun}, title = {An Approach to Utilizing Exchanged Documents in Construction Projects Based on Data Warehouse Technology}, doi = {10.25643/bauhaus-universitaet.122}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1227}, year = {2004}, abstract = {There are many construction projects in China and mass documents are exchanged among the multi-party, including the owner, the contractor and the engineer in the projects. Based on previous studies, an approach to the utilization of the exchanged documents is established by using data warehouse technology and a prototype system called EXPLYZER is developed. The approach and the prototype system are verified through their application in a construction project. It is concluded that the approach can support the decision-making in project management.}, subject = {Bauwerk}, 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 }, language = {en} } @inproceedings{JianpingTianyiQiping2004, author = {Jianping, Zhang and Tianyi, Ma and Qiping, Shen}, title = {Application of Data Warehouse and Data Mining in Construction Management}, doi = {10.25643/bauhaus-universitaet.124}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1247}, year = {2004}, abstract = {All construction project are constrained by their schedules, budgets and specifications, and safety and environmental regulations. These constraints made construction management more complex and difficult. At the same time, many historical data that can support the decisions in the future are kept in construction enterprises,. To use the historical data effectively and efficiently, it is essential to apply the data warehouse and data mining technologies. This paper introduces a research which aims to develop a data warehouse system according to the requirements of construction enterprises and use data mining technology to learn useful information and knowledge from the data warehouse system. The design, the development and the application of this system are detailedly introduced in this paper.}, subject = {Bauwerk}, language = {en} } @inproceedings{CheungNoruziaanLi2004, author = {Cheung, Moe M. S. and Noruziaan, Bahman and Li, W. C.}, title = {Data acquisition, processing and management systems for a Canadian bridge monitoring project}, doi = {10.25643/bauhaus-universitaet.123}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1235}, year = {2004}, abstract = {This paper will present a number of technical aspects for one of the most elaborate instrumentation and data acquisition projects ever undertaken in Canada. Confederation Bridge, the longest bridge built over ice covered seawater has been equipped with the state of the art data acquistition devices and systems as well as data transfer networks. The Bridge has been providing a fixed surface connection between Prince Edward Island and Province of New Brunswick in Canada since its opening in 1997. The Bridge has a rather long design service life of 100 years. Because of its large size and long span length, its design is not covered by any existing codes or standards worldwide. The focus of the paper is to introduce the data acquisition, transfer, processing and management systems. The instrumentation and communications infrastructure and devices will be presented in some details along with the data processing and management systems and techniques. Teams of engineers and researchers use the collected data to verify the analysis and design assumptions and parameters as well as investigate the short-term and long-term behaviour and health of the Bridge. The collected data are also used in furthering research activities in the field of bridge engineering and in elevating our knowledge about behaviour, reliability and durability of such complex structures, their components and materials.}, subject = {Bauwerk}, language = {en} } @inproceedings{LiuSoibelmanWu2004, author = {Liu, Liang and Soibelman, Lucio and Wu, Jianfeng}, title = {Data Fusion and Modeling for Construction Management Knowledge Discovery}, doi = {10.25643/bauhaus-universitaet.125}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1254}, year = {2004}, abstract = {Advances in construction data analysis techniques have provided useful tools to discover explicit knowledge on historical databases supporting project managers' decision making. However, in many situations, historical data are extracted and preprocessed for knowledge discovery based on time-consuming and problem-specific data preparation solutions, which often results in inefficiencies and inconsistencies. To overcome the problem, we are working on the development of a new data fusion methodology, which is designed to provide timely and consistent access to historical data for efficient and effective management knowledge discovery. The methodology is intended to be a new bridge between historical databases and data analysis techniques, which shields project managers from complex data preparation solutions, and enables them to use discovered knowledge for decision making more conveniently. This paper briefly describes the motivation, the background and the initial results of the ongoing research.}, subject = {Bauwerk}, language = {en} } @inproceedings{Pavlov2004, author = {Pavlov, Alexander}, title = {Data Transfer and Objects Recognition in Building Design}, doi = {10.25643/bauhaus-universitaet.126}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1265}, year = {2004}, abstract = {The problem of data interoperability is now very important. The formal description of construction systems and objects must base upon the modeling for the description of construction data domain. The XML-language was selected as a basis of a universal data format, ensuring natural hierarchy of objects, flexibility, good layout and expandability. The language, developed by the author, is called Building Object Description Extensible Markup Language (bodXML). The types of all objects used by data transfer should be definite beforehand with existing methods of programming. It limits the possibilities of IT in application of new types. But the recipient software must recognize the building objects even if the kind of object is unknown at the outset. The author offers a set of main topological and geometric properties being sufficient for recognition of main three-dimensional building constructions with flat edges. The tests of artificial neuron network have shown that the recognition of a kind of the constructions represented as a set of indicated parameters happens enough confidently.}, subject = {Bauwerk}, language = {en} } @inproceedings{WellmannJelicBaitschHartmann2004, author = {Wellmann Jelic, Andres and Baitsch, Matthias and Hartmann, Dietrich}, title = {Distributed computing of failure probabilities for structures in civil engineering}, doi = {10.25643/bauhaus-universitaet.103}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1030}, year = {2004}, abstract = {In this contribution the software design and implementation of an analysis server for the computation of failure probabilities in structural engineering is presented. The structures considered are described in terms of an equivalent Finite Element model, the stochastic properties, like e.g. the scatter of the material behavior or the incoming load, are represented using suitable random variables. Within the software framework, a Client-Server-Architecture has been implemented, employing the middleware CORBA for the communication between the distributed modules. The analysis server offers the possibility to compute failure probabilities for stochastically defined structures. Therefore, several different approximation (FORM, SORM) and simulation methods (Monte Carlo Simulation and Importance Sampling) have been implemented. This paper closes in showing several examples computed on the analysis server.}, subject = {Konzipieren }, language = {en} } @inproceedings{PetersenSeewald2004, author = {Petersen, Michael and Seewald, Gerrit}, title = {Establishing of fundamentals in building projects using web services}, doi = {10.25643/bauhaus-universitaet.127}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1273}, year = {2004}, abstract = {During the establishing of fundamentals in a building project a huge amount of influence factors and boundary conditions have to be investigated in order to provide the prerequisites for further planning processes. These investigative tasks are often related with a great effort concerning time and money, because there are no standardized workflows and interfaces which provide an efficient access to the necessary information related to a specific construction site. Within the fundamental investigation human and natural circumstances have to be taken into account. Thus, in this project two examples have been chosen in order to demonstrate the holistic approach for an integration and provision of georeferenced information. The developed internet-site http://www.grundlagenermittlung.de has been designed to support architects and civil engineers in early planning phases of a building project efficiently. It offers web-based services based on dynamic interfaces for a flexible search and collection of information concerning the building site. Therefore, a central Metadatabase-Server for Description, Discovery and Integration has been established which enables a registration of georeferenced services and the redirection of incoming requests to other, distributed data pools. Using this Yellow-Page concept in combination with the underlying meta-data based on the ISO 19115 standard an efficient investigation of geographical and environmental information becomes possible.}, subject = {Bauwerk}, language = {en} } @inproceedings{AsayamaMae2004, author = {Asayama, Shuichi and Mae, Toshifumi}, title = {Fractal Truss Structure and Automatic Form Generation Using Iterated Function System}, doi = {10.25643/bauhaus-universitaet.104}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1046}, year = {2004}, abstract = {This paper describes a couple of new truss structures based on fractal geometry. One is the famous Sierpinski Gasket and another is a fractal triangle derived by means of applying a process forming leaves of a cedar tree using M. F. Barnsley's contraction mapping theory. Therefore a pair of x-y coordinates of an arbitrary nodal point on the structures are generated easily if IFS(Iterated Function System) codes and a scale of them are specified. Structural members are defined similarly. Thus data for frame analysis can be generated automatically, which is significant if the objective structure has complex configuration. Next analytical results under vertical and wind loadings in Japanese Building Code are shown. Here members are assumed to be timber and to have cross section of 15cm×15cm. Finally authors conclude that geometrically new truss structures were developed and automatic data generation for frame analysis was attained using IFS. Analytical results show they contribute to saving material when compared it with King-post truss.}, subject = {Konzipieren }, language = {en} } @article{WillenbacherHuebler2004, author = {Willenbacher, Heiko and H{\"u}bler, Reinhard}, title = {Intelligent Link-Management for the Support of Integration in Building Life Cycle}, doi = {10.25643/bauhaus-universitaet.222}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2223}, year = {2004}, abstract = {The processes in the life cycle of buildings are characterised by highly distinct teamwork. The integration of all the distributed working participants, by providing an environment, which especially supports the communication and collaboration between the actors, is a fundamental step to improve the efficiency of the involved processes and to reduce the total costs. In this article, a link based modelling approach and its "intelligent" link management is introduced (1). This approach realises an integration environment based on a special building model that acts as a decision support system. The link-based modelling is characterised by the definition and specialisation of links between partial models. These intelligent managed links enable a very flexible and task specific data access and exchange between all the different views and partial models of the participants.}, subject = {Mehragentensystem}, language = {en} } @inproceedings{PengLawLau2004, author = {Peng, Jun and Law, Kincho and Lau, Gloria}, title = {Internet-Enabled Software Model for Nonlinear Structural Analysis and Simulations}, doi = {10.25643/bauhaus-universitaet.105}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1057}, year = {2004}, abstract = {This paper describes an Internet-enabled software model that could facilitate the development and utilization of nonlinear structural analysis programs. The software model allows users easy access to the analysis core program and the analysis results by using a web-browser or other application programs. In addition, new and legacy codes can be incorporated as distributed services and be integrated with the software framework from disparate sites. A distributed project management system, taking advantages of Internet and database technologies, is implemented to store and manage model information and simulation results. Nonlinear dynamic analysis and simulations of a bridge structure is performed to illustrate the facilities of the Internet-enabled software model.}, subject = {Konzipieren }, language = {en} } @inproceedings{MilesCenTaylor2004, author = {Miles, John and Cen, Mei and Taylor, Mark}, title = {Linking Sketching and Constraint Checking for Early Conceptual Design}, doi = {10.25643/bauhaus-universitaet.1548}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1547}, year = {2004}, abstract = {At the start of the conceptual design process, designers start to give tangible form to their thoughts by sketching. This helps with reasoning and communicates ideas to other members of the team. Sketches are gradually worked up into more formal drawings which are then passed to the other stages of the design process. There are however some problems with basing early ideas on sketching. For example, due to their ad-hoc nature, sketches tend only to be diagrammatic representations and so designers cannot be sure that their ideas are feasible and what is being proposed meets the constraints described in the client brief. This can result in designers wasting time working up ideas which prove to be unsuitable. Also the process of constraint checking is complex and time consuming and so designers tend limit their search of possible options and instead choose satisfying rather than good solutions. This paper describes the INTEGRA project which examines the role of sketching in early conceptual design and how this can be linked to other aspects of the process and particularly automated constraint checking using an IT based approach. The focus for the work is the design of framed buildings. A multi-disciplinary approach has been adopted and the work has been undertaken in close collaboration with practising designers and clients.}, subject = {Konzipieren }, language = {en} } @inproceedings{BaitschHartmann2004, author = {Baitsch, Matthias and Hartmann, Dietrich}, title = {Object Oriented Finite Element Analysis for Structural Optimization using p-Elements}, doi = {10.25643/bauhaus-universitaet.108}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1089}, year = {2004}, abstract = {The optimization of continuous structures requires careful attention to discretization errors. Compared to ordinary low order formulation (h-elements) in conjunction with an adaptive mesh refinement in each optimization step, the use of high order finite elements (so called p-elements) has several advantages. However, compared to the h-method a higher order finite element analysis program poses higher demands from a software engineering point of view. In this article the basics of an object oriented higher order finite element system especially tailored to the use in structural optimization is presented. Besides the design of the system, aspects related to the employed implementation language Java are discussed.}, subject = {Konzipieren }, language = {en} } @article{KiviniemiFischer2004, author = {Kiviniemi, Arto and Fischer, Martin}, title = {Requirements Management Interface to Building Product Models}, doi = {10.25643/bauhaus-universitaet.242}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2427}, year = {2004}, abstract = {In current AEC practice client requirements are typically recorded in a building program, which, depending on the building type, covers various aspects from the overall goals, activities and spatial needs to very detailed material and condition requirements. This documentation is used as the starting point of the design process, but as the design progresses, it is usually left aside and changes are made incrementally based on the previous design solution. These incremental small changes can lead to a solution that may no longer meet the original requirements. In addition, design is by nature an iterative process and the proposed solutions often also cause evolution in the client requirements. However, the requirements documentation is usually not updated accordingly. Finding the latest updates and evolution of the requirements from the documentation is very difficult, if not impossible. This process can lead to an end result, which is significantly different from the documented requirements. Some important requirements may not be satisfied, and even if the design process was based on agreed-upon changes in the scope and requirements, differences in the requirements documents and in the completed building can lead to well-justified doubts about the quality of the design and construction process...}, subject = {Produktmodell}, language = {en} } @inproceedings{ChangwanHaasCaldas2004, author = {Changwan, Kim and Haas, Carl and Caldas, Carlos}, title = {Spatial data acquisition, integration, and modeling for real-time project life-cycle applications}, doi = {10.25643/bauhaus-universitaet.128}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1280}, year = {2004}, abstract = {Current methods for site modeling employs expensive laser range scanners that produce dense point clouds which require hours or days of post-processing to arrive at a finished model. While these methods produce very detailed models of the scanned scene, useful for obtaining as-built drawings of existing structures, the associated computational time burden precludes the methods from being used onsite for real-time decision-making. Moreover, in many project life-cycle applications, detailed models of objects are not needed. Results of earlier research conducted by the authors demonstrated novel, highly economical methods that reduce data acquisition time and the need for computationally intensive processing. These methods enable complete local area modeling in the order of a minute, and with sufficient accuracy for applications such as advanced equipment control, simple as-built site modeling, and real-time safety monitoring for construction equipment. This paper describes a research project that is investigating novel ways of acquiring, integrating, modeling, and analyzing project site spatial data that do not rely on dense, expensive laser scanning technology and that enable scalability and robustness for real-time, field deployment. Algorithms and methods for modeling objects of simple geometric shape (geometric primitives from a limited number of range points, as well as methods provide a foundation for further development required to address more complex site situations, especially if dynamic site information (motion of personnel and equipment). Field experiments are being conducted to establish performance parameters and validation for the proposed methods and models. Initial experimental work has demonstrated the feasibility of this approach.}, subject = {Bauwerk}, language = {en} } @article{Fink2004, author = {Fink, Thomas}, title = {Structural analysis, design and detailing using standard CAD software and standard building information model}, doi = {10.25643/bauhaus-universitaet.270}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2702}, year = {2004}, abstract = {This paper describes the concept of a german commercial software package developed for the needs of structural engineers. Using a standard CAD software as user interface for all geometrical data and to save all important input data, there is a natural link to upcoming building information models.}, subject = {Bauindustrie}, language = {en} }