@inproceedings{ReinhardtGarrettAkinci2004, author = {Reinhardt, Jan and Garrett, James H. and Akinci, Burcu}, title = {SiDaCoS: Product and Process Models on Construction Sites}, doi = {10.25643/bauhaus-universitaet.115}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1156}, year = {2004}, abstract = {Site superintendents performing project management tasks on construction sites need to access project documents and need to collect information that they observe while inspecting the site. Often, information that is observed on a construction site needs to be integrated into electronic documents or project control systems. In the future, we expect integrated product and process models to be the medium for storing and handling construction project management information. Even though mobile computing devices today are already capable of storing and handling such integrated product and process data models, the user interaction with such large and complex models is difficult and not adequately addressed in the existing research. In this paper, we introduce a system that supports project management tasks on construction sites effectively and efficiently by making integrated product and process models accessible. In order to effectively and efficiently enter or access information, site superintendents need visual representations of the project data that are flexible with respect to the level of detail, the decomposition structure, and the type of visual representation. Based on this understanding of the information and data collection needs, we developed the navigational model framework and the application Site Data Collection System (SiDaCoS), which implements that framework. The navigational model framework allows site superintendents to create customized representations of information contained in a product and process model that correspond to their data access and data collection needs on site.}, subject = {Mobile Computing}, 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} } @article{PickHeimsundMilbradt2004, author = {Pick, Tobias and Heimsund, Bjoern-Ove and Milbradt, Peter}, title = {Development and Analysis of Sparse Matrix Concepts for Finite Element Approximation on general Cells}, doi = {10.25643/bauhaus-universitaet.250}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2500}, year = {2004}, abstract = {In engineering and computing, the finite element approximation is one of the most well-known computational solution techniques. It is a great tool to find solutions for mechanic, fluid mechanic and ecological problems. Whoever works with the finite element method will need to solve a large system of linear equations. There are different ways to find a solution. One way is to use a matrix decomposition technique such as LU or QR. The other possibility is to use an iterative solution algorithm like Conjugate Gradients, Gauß-Seidel, Multigrid Methods, etc. This paper will focus on iterative solvers and the needed storage techniques...}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{PetzoldDonath2004, author = {Petzold, Frank and Donath, Dirk}, title = {The building as a container of information : the starting point for project development and design formulation}, doi = {10.25643/bauhaus-universitaet.184}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1848}, year = {2004}, abstract = {For planning in existing built contexts, the building survey is the starting point for initial planning proposals, for the diagnosis and documentation of building damages, for the creation of objectives catalogues, for the detailed design of renovation and conversion measures and for ensuring fulfilment of building legislation, particularly by change of use and refitting. An examination of currently available IT-tools shows insufficient support for planning within existing contexts, most notably a deficit with regard to information capture and administration. This paper discusses the concept for a modular surveying system (basic concept, separation of geometry from semantic data, and separation into sub-systems) and the prototypical realisation of a system for the complete support of the entire building surveying process for existing buildings. The project aims to contribute to the development of a planning system for existing buildings. ...}, subject = {Architektur}, language = {en} } @inproceedings{PetzoldBartelsDonath2004, author = {Petzold, Frank and Bartels, Heiko and Donath, Dirk}, title = {New techniques in Building Surveying}, doi = {10.25643/bauhaus-universitaet.180}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1803}, year = {2004}, abstract = {Building activities in the construction industry in Germany increasingly concentrate on building measures in or involving the existing built environment. Before planning can begin, buildings must be surveyed in whole or in part with the surveying of geometric data playing a dominant role. The geometric survey is typically undertaken using geodetic or photogrammetric measuring techniques and equipment that have been adapted for use in building surveying. Accordingly appropriate technical knowledge is required in order to be able to operate them as well as a considerable financial investment. Such equipment and surveying methods are usually adaptations from other disciplines. The paper discusses and presents approaches to developing "new" equipment for building surveying, devised with the needs of building surveying in mind - redesigns or new designs for surveying tools. The designs are the result of an inter-disciplinary project between the Faculty of Architecture and the Faculty of Product Design at the Bauhaus Universit{\"a}t Weimar.}, subject = {Architektur}, 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{PetersenDiaz2004, author = {Petersen, Michael and Diaz, Joaquin}, title = {Integrated planning of buildings based on computer models in project communication systems}, doi = {10.25643/bauhaus-universitaet.176}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1762}, year = {2004}, abstract = {The increasing demands in building and civil engineering - with regard to the growing amount of legal requirements and the needs of a flexible usage of the building - requires an optimisation of all processes during the planning and construction phases. This aim can be only reached by transferring of innovative information and communication technologies in the field of cooperation of all partners in a building project. In this article the enhancement of the existing planning processes based on an improved information management is introduced. Since the late 90ies the availability of hardware and software infrastructures for a networkbased cooperation, e.g. email, in small and middle-sized companies increased the problems of an unstructured communication in the planning and construction processes. These problems have not been solved by the usage of the upcoming project communication systems either, which are often used as a simple medium for data transfer. Because of the easy way of distributing documents to all planning partners a huge amount of files and subsequent versions can be stored so that the planners often have to scope with an information overflow. The underlying hierarchical structures based on simple files stored in tree views are not sufficient for an adequate representation of the different specific views of the planners and the management of relationships between the three information domains building structure, costs and time schedules. ..}, subject = {Architektur}, language = {en} } @inproceedings{PerevalovaPahl2004, author = {Perevalova, Julia and Pahl, Peter Jan}, title = {Structural and Functional Dependence of Objects in Data Bases}, doi = {10.25643/bauhaus-universitaet.168}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1683}, year = {2004}, abstract = {Let the information of a civil engineering application be decomposed into objects of a given set of classes. Then the set of objects forms the data base of the application. The objects contain attributes and methods. Properties of the objects are stored in the attributes. Algorithms which the objects perform are implemented in the methods of the objects. If objects are modified by a user, the consistency of data in the base is destroyed. The data base must be modified in an update to restore its consistency. The sequence of the update operations is not arbitrary, but is governed by dependence between the objects. The situation can be described mathematically with graph theory. The available algorithms for the determination of the update sequence are not suitable when the data base is large. A new update algorithm for large data bases has been developed and is presented in this paper.}, subject = {Baubetrieb}, 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{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{ParmeeAbraham2004, author = {Parmee, Ian and Abraham, Johnson}, title = {User-centric Evolutionary Design Systems - the Visualisation of Emerging Multi-Objective Design Information}, doi = {10.25643/bauhaus-universitaet.109}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1094}, year = {2004}, abstract = {The paper describes further developments of the interactive evolutionary design concept relating to the emergence of mutually inclusive regions of high performance design solutions. These solutions are generated from cluster-oriented genetic algorithm (COGAs) output and relate to a number of objectives introduced during the preliminary design of military airframes. The data-mining of multi-objective COGA (moCOGA) output further defines these regions through the application of clustering algorithms, data reduction and variable attribute relevance analyses. A number of visual representations of the COGA output projected onto both variable and objective space are presented. The multi-objective output of the COGA is compared to output from a Strength Pareto Evolutionary Algorithm (SPEA-II) to illustrate the manner in which moCOGAs can generate good approximations to Pareto frontiers.}, subject = {Konzipieren }, language = {en} } @inproceedings{Palm2004, author = {Palm, Johan}, title = {Integrated Engineering Workflow focused on the Structural Engineering in the Industrial Environment}, doi = {10.25643/bauhaus-universitaet.162}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1625}, year = {2004}, abstract = {The engineering and construction industry has been slow to exploit the full potential of information technology. The industry is highly fragmented, price sensitive, risk-adverse, and profit margins are small. Each project is unique with a small amount of technological innovation opportunities to capitalise on from one project to the next. Technological innovations that have been taking place are just simulating the old traditional paper workflow. Engineering information in digital form is being conveyed using traditional paper representations, which have to be interpreted by humans before the information can be used in other applications, thereby creating 'islands of information'. It can be seen that poorly implemented IT strategies are duplicating paperwork, rather than reducing or eliminating it (Crowley et al., 2000). This paper will introduce the Integrated Engineering Workflow (IEW) concept to re-organise a structural discipline working on multi-disciplinary projects so as to maximise the advantages offered by new information technology.}, subject = {Baubetrieb}, language = {en} } @article{PalaneeswaranKumaraswamyNg2004, author = {Palaneeswaran, Ekambaram and Kumaraswamy, Mohan and Ng, Thomas}, title = {Knowledge Management for Small and Medium Contractors}, doi = {10.25643/bauhaus-universitaet.258}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2582}, year = {2004}, abstract = {Effective knowledge management is increasingly considered as a cornerstone of sustainable business success. Knowledge management systems are strategically valuable for both ensuring consistency and continuous improvement of various aspects such as quality delivery, productivity and competitiveness. The small and medium enterprises (SMEs) in the construction industry are mostly operating under tighter timeframes, narrower profit margins and more constrained resources. Hence the recently commenced SMILE-SMC (Strategic Management with Information Leveraged Excellece for Small and Medium Contractors) project aims to support the information and knowledge management needs of the small and medium contractors in Hong Kong. This paper presents some snapshots on the SMILE-SMC project, and its conceptualized deliverables with some highlights of recent developments.}, subject = {Wissensmanagement}, language = {en} } @article{OsadaKoikeMorimoto2004, author = {Osada, Teppei and Koike, Hirotaka and Morimoto, Akinori}, title = {Research on Establishment of a Standard of Traffic Impact Assessment with Integrated Database System}, doi = {10.25643/bauhaus-universitaet.264}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2647}, year = {2004}, abstract = {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.}, subject = {Verkehrsplanung}, language = {en} } @inproceedings{Olivier2004, author = {Olivier, A. H.}, title = {An application-centred framework for distributed engineering applications}, doi = {10.25643/bauhaus-universitaet.135}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1353}, year = {2004}, abstract = {The conceptual structure of an application that can support the structural analysis task in a distributed collaboratory is described in (van Rooyen and Olivier 2004). The application described there has a standalone component for executing the finite element method on a local workstation in the absence of network access. This application is comparable to current, local workstation based finite element packages. However, it differs fundamentally from standard packages since the application itself, and its objects, are adapted to support distributed execution of the analysis task. Basic aspects of an object-oriented framework for the development of applications which can be used in similar distributed collaboratories are described in this paper. An important feature of this framework is its application-centred design. This means that an application can contain any number of engineering models, where the models are formed by the collection of objects according to semantic views within the application. This is achieved through very flexible classes Application and Model, which are described in detail. The advantages of the application-centred design approach is demonstrated with reference to the design of steel structures, where the finite element analysis model, member design model and connection design model interact to provide the required functionality.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{O'BrienElMashaleh2004, author = {O'Brien, William and El-Mashaleh, Mohammad}, title = {An Empirical Study Relating Construction Firm Performance and IT Utilization}, doi = {10.25643/bauhaus-universitaet.173}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1739}, year = {2004}, abstract = {This paper examines the impact of information technology (IT) utilization on construction firm performance. Based on empirical data collected from 74 US construction firms, the analyses provide evidence that IT has a positive impact on overall firm performance, schedule performance, and cost performance. Firm performance is a composite score of several metrics of performance: schedule performance, cost performance, customer satisfaction, safety performance, and profit. No relationship is found between IT utilization and customer satisfaction, safety, or profit, although this may be due to limitations of the study given strong correlations between IT utilization and cost and schedule performnance. The empirical evidence of positive association between performance and IT use provided by this research is significant to both construction practice and research literature. This evidence should encourage firms to adopt and invest in IT tools.}, subject = {Architektur}, language = {en} } @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} } @article{NohPark2004, author = {Noh, Jung-Hwi and Park, Jong-Heon}, title = {A Calculation of Initial Cable Force for Ko-Ha Grand Bridge}, doi = {10.25643/bauhaus-universitaet.245}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2459}, year = {2004}, abstract = {The primary objective of initial shape analysis of a cable stayed bridge is to calculate initial installation cable tension forces and to evaluate fabrication camber of main span and pylon providing the final longitudinal profile of the bridge at the end of construction. In addition, the initial cable forces depending on the alternation of the bridge's shape can be obtained from the analysis, and will be used to provide construction safety during construction. In this research, we conducted numerical experiments for initial shape of Ko-ha bridge, which will be constructed in the near future, using three different typical methods such as continuous beam method, linear truss method, and IIMF (Introducing Initial Member Force) method}, subject = {Finite-Elemente-Methode}, language = {en} } @article{NeubergFankEkkerlein2004, author = {Neuberg, Frank and Fank, Ernst and Ekkerlein, Christian}, title = {Integrated Life Cycle Simulation and Assessment of Buildings}, doi = {10.25643/bauhaus-universitaet.235}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2351}, year = {2004}, abstract = {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.}, subject = {Produktmodell}, language = {en} } @inproceedings{MundaniBungartz2004, author = {Mundani, Ralf-Peter and Bungartz, Hans-Joachim}, title = {Octrees for Cooperative Work in a Network-Based Environment}, doi = {10.25643/bauhaus-universitaet.146}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1460}, year = {2004}, abstract = {Assuring global consistency in a cooperative working environment is the main focus of many nowaday research projects in the field of civil engineering and others. In this paper, a new approach based on octrees will be discussed. It will be shown that by the usage of octrees not only the management and control of processes in a network-based working environment can be optimised but also an efficient integration platform for processes from various disciplines - such as architecture and civil engineering - can be provided. By means of an octree-based collision detection resp. consistency assurance a client-server-architecture will be described as well as sophisticated information services for a further support of cooperative work.}, subject = {Ingenieurbau}, language = {en} } @article{MotawaAnumbaElHamalawi2004, author = {Motawa, Ibrahim and Anumba, Chimay and El-Hamalawi, A.}, title = {Development of a Fuzzy System for Change Prediction in Construction Projects}, doi = {10.25643/bauhaus-universitaet.218}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2180}, year = {2004}, abstract = {Change management has been the focus of different IT systems. These IT systems were developed to represent design information, record design rationale, facilitate design coordination and changes. They are largely based on managing reactive changes, particularly design changes, in which changes are recorded and then propagated to the relevant project members. However, proactive changes are hardly dealt with in IT systems. Proactive changes require estimating the likelihood of occurrence of a change event as well as estimating the degree of change impacts on project parameters. Changes in construction projects often result from the uncertainty associated with the imprecise and vague knowledge of much project information at the early stages of projects. This is a major outcome of the case studies carried out as part of this research. Therefore, the proposed model considers that incomplete knowledge and certain project characteristics are always behind change causes. For proactive changes, predicting a change event is the main task for modelling. The prediction model should strive to integrate these main elements: 1) project characteristics that lead to change 2) causes of change, 3) the likelihood of change occurrence, and 4) the change consequences. It should also define the dependency relationships between these elements. However, limited data (documented) are only available from previous projects for change cases and many of the above elements can only be expressed in linguistic terms. This means that the model will simulate the uncertainty and subjectivity associated with these sets of elements. Therefore, a fuzzy model is proposed in this research to capture these elements. The model analyses the impact of each set of elements on the other by assigning fuzzy values for these elements that express the uncertainty and subjectivity of their impact. The main aim is to predict change events and evaluate change effects on project parameters. The fuzzy model described above was developed in an IT system for operational purposes and was designed as a Java package of components with their supporting classes, beans, and files. This paper describes the development and the architecture of the proposed IT system to achieve these requirements. The system is intended to help project teams in dealing with change causes and then the change consequences in construction projects.}, subject = {Mehragentensystem}, language = {en} } @article{MostEckardt2004, author = {Most, Thomas and Eckardt, Stefan}, title = {Application of a hybrid parallelization technique to accelerate the numerical simulation of nonlinear mechanical problems}, doi = {10.25643/bauhaus-universitaet.259}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2599}, year = {2004}, abstract = {This paper presents the combination of two different parallelization environments, OpenMP and MPI, in one numerical simulation tool. The computation of the system matrices and vectors is parallelized with OpenMP and the solution of the system of equations is done with the MPIbased solver MUMPS. The efficiency of both algorithms is shown on several linear and nonlinear examples using the Finite Element Method and a meshless discretization technique.}, subject = {Framework }, language = {en} } @article{MonobeTanakaFuruta2004, author = {Monobe, Kantaro and Tanaka, Shigenori and Furuta, Hitoshi}, title = {Development of a System for Making Guide Maps based on the Idea of the Cognitive Map}, doi = {10.25643/bauhaus-universitaet.268}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2688}, year = {2004}, abstract = {Digital maps are very easily applied as route guide maps. Route guide maps are provided through Web or a mobile phone services, and demand for such services is increasing. However, the production of a route guide map requires a great deal of time. Therefore, it is difficult for general users to make route guide maps. The purpose of the present research is the development of a system that can generate a route guide map using the Digital Map 2500 (Spatial Data Framework) published by the Geographical Survey Institute. This system will not require advanced equipment or expert knowledge. Therefore, anyone can produce route guide maps easily and quickly. By using the Digital Map 2500, the time and cost required in order to generate a map are reduced. Moreover, a useful route guide map can be created by simplifying the map form based on the human cognitive map.}, subject = {Geoinformationssystem}, language = {en} } @inproceedings{Molkenthin2004, author = {Molkenthin, Frank}, title = {Web-based Collaborative Engineering based on Information Sharing - HydroWeb: An Education Experiment in the Internet}, doi = {10.25643/bauhaus-universitaet.186}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1869}, year = {2004}, abstract = {This paper describes the concept and experiences of the international Open Distance Learning Course 'HydroWeb'. This course deals with the introduction of Web-based Collaborative Engineering in standard education programmes of water related engineering and civil engineering based on information sharing. Organized under the umbrella of IAHR and ETNET21 this course is collaboration from several universities from all over the world. Started in 1999 the course demonstrates the potential and innovative opportunities of Web-Technology in education, research and engineering: Students from the different partner universities form small distributed teams to solve a given engineering problem in a time window of two weeks. To overcome the spatial distribution the students apply modern Web technology such as video conferencing, application sharing and document management. All results as well as the final reports are presented as Web document on a shared Web-based project platform (http://www.hydro-web.org). Besides the experiences to apply standard Web tools and working methods based on information sharing instead the conventional information exchange in the daily engineering work the students improve their soft skills operate successfully in international and interdisciplinary project environments as part of the 'Technical Culture' of nowadays.}, subject = {Architektur}, language = {en} } @inproceedings{Molkenthin2004, author = {Molkenthin, Frank}, title = {Web-based Information Systems: Data Monitoring, Analysis and Reporting for Measurements and Simulations}, doi = {10.25643/bauhaus-universitaet.118}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1184}, year = {2004}, abstract = {This paper describes the concept, implementation and application of the Web-based Information System 'Turtle' for data monitoring, analysis, reporting and management in engineering projects. The system uses a generalised object-oriented approach for information modelling of physical state variables from measurements and simulations by sets of tensor objects and is implemented platform-independently as a Web application. This leads to a more flexible handling of measurement and simulation information in distributed and interdisciplinary engineering projects based on the concept of information sharing. The potential and advantages of Web-based information systems like 'Turtle' are described for one selected application example: a measurement programme dealing with the physical limnology of Lake Constance.}, subject = {Mobile Computing}, language = {en} } @article{MironovPahl2004, author = {Mironov, Vadim and Pahl, Peter Jan}, title = {A Prismatic Finite Element for Accurate Arch Dam Analysis}, doi = {10.25643/bauhaus-universitaet.246}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2467}, year = {2004}, abstract = {The displacements and stresses in arch dams and their abutments are frequently determined with 20-node brick elements. The elements are distorted near the contact plane between the wall and the abutment. A cantilever beam testbed has been developed to investigate the consequences of this distortion. It is shown that the deterioration of the accuracy in the computed stresses is significant. A compatible 18-node wedge element with linear stress variation is developed as an alternative to the brick element. The shape of this element type is readily adapted to the shape of the contact plane. It is shown that the accuracy of the computed stresses in the vicinity of the contact plane is improved significantly by the use of wedge elements.}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{MilesTaylorAnumba2004, author = {Miles, John and Taylor, Mark and Anumba, Chimay}, title = {VRML Virtual Worlds - An Alternative to the Desktop Metaphor for GUI's?}, doi = {10.25643/bauhaus-universitaet.185}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1855}, year = {2004}, abstract = {Metaphors are commonly used by software developers in the creation of GUI's. This paper looks at the use of multi-user VRML to create virtual metaphors, developing a conceptual design tool that can be used intuitively with little or no training.}, subject = {Architektur}, language = {en} } @inproceedings{MilesJoitaBurnap2004, author = {Miles, John and Joita, Liviu and Burnap, Peter}, title = {Collaborative Engineering: Virtual Teams in a Grid Environment Supporting Consortia in the Construction Industry}, doi = {10.25643/bauhaus-universitaet.136}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1362}, year = {2004}, abstract = {In the AEC (Architecture / Engineering / Construction) industry a number of individuals and organisations collaborate and work jointly on a construction project. The resulting consortium has large pool of expertise and experience and can be defined as a Virtual Organisation (VO) formed for the duration of the project. VOs are electronically networked organisations where IT and web based communication technology play an important role in coordinating various activities of these organisations. This paper describes the design, development and implementation of a Grid enabled application called the Product Supplier Catalogue Database (PSCD) which supports collaborative working in consortia. As part of the Grid-enabling process, specialised metadata is being developed to enable PSCD to effectively utilise Grid middleware such as Globus and Java CoG toolkits. We also describe our experience whilst designing, developing and deploying the security service of the application using the Globus Security Interface (GSI).}, subject = {Ingenieurbau}, 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} } @article{MilbradtSchierbaumSchwoeppe2004, author = {Milbradt, Peter and Schierbaum, Jochen and Schw{\"o}ppe, Axel}, title = {Finite Cell-Elements of Higher Order}, doi = {10.25643/bauhaus-universitaet.252}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2524}, year = {2004}, abstract = {The method of the finite elements is an adaptable numerical procedure for interpolation as well as for the numerical approximation of solutions of partial differential equations. The basis of these procedure is the formulation of suitable finite elements and element decompositions of the solution space. Classical finite elements are based on triangles or quadrangles in the two-dimensional space and tetrahedron or hexahedron in the threedimensional space. The use of arbitrary-dimensional convex and non-convex polyhedrons as the geometrical basis of finite elements increases the flexibility of generating finite element decompositions substantially and is sometimes the only way to get a clear decomposition...}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{MenzelDittrichDomschke2004, author = {Menzel, Karsten and Dittrich, J{\"o}rg and Domschke, Sven}, title = {About the implantation process of mobile computing in AEC}, doi = {10.25643/bauhaus-universitaet.110}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1106}, year = {2004}, abstract = {The AEC industry is conscious of the potentials arising from the usage of mobile computer systems to increase productivity by streamlining their business processes. Discussions are no longer on whether or not to use a mobile computer solution, but rather, on how it should be used. However, the implantation process of this new technology in Architecture, Engineering and Construction (AEC) and Facility Management (FM) practise is very slow and should be improved. One way to encourage and ease the usage of mobile computer systems in AEC is a more process-oriented usability and context appropriateness of mobile computer solutions. Context-sensitivity is defined as a crucial feature to be taken into account for further research in the area of Mobile Computing. Context-sensitive, mobile IT-solutions depend on two features: (1) flexible definitions of (construction) processes describing the context and (2) tools for flexible, multi-dimensional information management representing the context. It is on this premise that the authors propose the n-dimensional data management approach for the implementation of mobile computing solutions. In this paper, we analyse working scenarios in the AEC and FM sector, defining context aspects which are transformed and formalized as dimension hierarchies of the envisaged context model.}, subject = {Mobile Computing}, language = {en} } @article{MelnikovSemenov2004, author = {Melnikov, B. E. and Semenov, Artem}, title = {Application of Multimodel Method of Elasto-Plastic Analysis for the Multilevel Computation of Structures}, doi = {10.25643/bauhaus-universitaet.248}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2487}, year = {2004}, abstract = {Creation of hierarchical sequence of the plastic and viscoplastic models according to different levels of structure approximations is considered. Developed strategy of multimodel analysis, which consists of creation of the inelastic models library, determination of selection criteria system and caring out of multivariant sequential clarifying computations, is described. Application of the multimodel approach in numerical computations has demonstrated possibility of reliable prediction of stress-strain response under wide variety of combined nonproportional loading.}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{MelhemCheng2004, author = {Melhem, Hani and Cheng, Yousheng}, title = {Numeric Prediction Algorithms for Bridge Corrosion}, doi = {10.25643/bauhaus-universitaet.198}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1982}, year = {2004}, abstract = {The research reported in this article was conducted to mainly explore the two common numeric prediction techniques, the model tree and the regression tree, when used in conjunction with bagging as a wrapper method. Bagging is used to improve the prediction accuracy of these two algorithms, and results are compared with the ones obtained earlier by the k-nearest neighbor (KNN) algorithm. From the conducted experiments, both the bagged regression tree and bagged model tree produce better results than not only their corresponding regression tree and model tree alone, but also the KNN with optimal value of k equal to 7. In addition, the bagged model tree yields the lowest prediction errors and a highest correlation coefficient of 0.81. It is demonstrated that it is feasible to use the bagged model tree for engineering applications in prediction problems such as estimating the remaining service life of bridge decks.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{MeissnerRueppelTheiss2004, author = {Meißner, Udo F. and Rueppel, Uwe and Theiss, Mirko}, title = {Network-Based Fire Engineering Supported by Agents}, doi = {10.25643/bauhaus-universitaet.144}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1447}, year = {2004}, abstract = {Building design in Civil Engineering is characterized by the cooperation of experts in multiple disciplines. Close cooperation of engineers in different fields is the basis of high product quality, short development periods and a minimum of investment costs. For each building the engineers have to create a new fire engineering model. The consistent realization of the fire engineering model in all details has high demands on communication, collaboration and building models. Thereby, to preserve the related design models consistent to each other and compatible with the rules of fire engineering is a complex task. In addition, regulations and guidelines vary according to the building location, so the knowledge base must be integrated dynamically into the planning process. This contribution covers the integration of engineers and design models into a cooperation network on the basis of mobile agents. The distributed models of architectural design, structural planning and fire engineering are supported. These models are implemented as XML-based models which can be accessed by mobile agents for information retrieval and for processing tasks. Agents are provided to all planners, they are enabled to check up the distributed design models with the knowledge base of the fire protection regulations,. With the use of such an agent each planner is supported to check up his planning for accordance with the fire protection requirements. The fire-engineering-agent analyzes the design and detects inconsistencies by processing fire protection requirements and design model facts in a rule-based expert system. The possibility to check the planning information at an early state in the sense of compatibility to the fire protection regulations enables a comprehensive diagnosis of the design and the reduction of planning errors.}, subject = {Ingenieurbau}, language = {en} } @article{Makanae2004, author = {Makanae, Koji}, title = {Highway Sequence Editor based on the Length-based Highway Product Model}, doi = {10.25643/bauhaus-universitaet.234}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2347}, year = {2004}, abstract = {The highway product model based on the length information of the centerline, and the application system is developed. This paper shows the schema and the modeling process of the product model, which includes geometric elements such as an alignment, lanes, sidewalks, shoulders and sprits, and accessories such as guard fences, plantings and signs. Furthermore, The Highway Sequence Editor (HSE) is developed as an application system to verify the model.}, subject = {Produktmodell}, 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} } @article{MaQin2004, author = {Ma, Zhiliang and Qin, Liang}, title = {A Framework of Management Information System for Construction Projects}, doi = {10.25643/bauhaus-universitaet.212}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2126}, year = {2004}, abstract = {A comprehensive framework of information management system for construction projects in China has been established through extensive literature survey and field investigation. It utilizes the potential information technologies and covers the practical management patterns as well as the major aspects of construction project management. It can be used to guide and evaluate the design of the information management systems for construction projects in order to make the system to be applicable to a wide variety of construction projects and survive the changes in project management.}, subject = {Mehragentensystem}, language = {en} } @inproceedings{LaehrBletzinger2004, author = {L{\"a}hr, Andr{\´e} and Bletzinger, Kai-Uwe}, title = {Design of an Analysis Environment for Planning Decision Support}, doi = {10.25643/bauhaus-universitaet.1370}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1370}, year = {2004}, abstract = {In this contribution, the design of an analysis environment is presented, that supports an analyst to come to a decision within a gradual collaborative planning process. An analyst represents a project manager, planner or any other person, involved in the planning process. Today, planning processes are managed by several geographically distributed planners and project managers. Thus, complexity of such a process rises even more. Prediction of consequences of many planning decisions is not possible, in particular since assessment of a planning advance is not trivial. There have to be considered several viewpoints, that depend on individual perceptions. In the following, methods are presented to realize planning decision support.}, subject = {Ingenieurbau}, 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{LiuSoibelmanTrupp2004, author = {Liu, Liang and Soibelman, Lucio and Trupp, Torsten}, title = {Novel Technologies for Construction Field Data Collection}, doi = {10.25643/bauhaus-universitaet.112}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1120}, year = {2004}, abstract = {A vast growth of advanced information technology systems and tools nowadays is opening new ways to collect accurate as-built data. Since the turn of the millennium, new technology developments enable for the first time to gather accurate as-built information. Accurate as-built data will be of great usage to construction management as well as to designers and engineers. Given that most of the planned data are already digitally available, as-built data remains on paper forms. Information technology developments are opening new ways to digitize construction field data in order to develop intelligent tools for construction management allowing design engineers to update as-planned data. 3D Laser scanning, digital close-range photogrammetry and mobile computing are among the promising data collection technologies, which are auspicious to create new opportunities to develop advanced construction management and engineering tools. Primarily, accurate collected as-built data will be highly beneficial for the process of updating as-planned data.}, subject = {Mobile Computing}, language = {en} } @article{LikhitruangsilpIoannou2004, author = {Likhitruangsilp, Veerasak and Ioannou, Photios}, title = {Risk-sensitive Markov Decision Process for Underground Construction Planning and Estimating}, doi = {10.25643/bauhaus-universitaet.224}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2247}, year = {2004}, abstract = {This paper presents an application of dynamic decision making under uncertainty in planning and estimating underground construction. The application of the proposed methodology is illustrated by its application to an actual tunneling project—The Hanging Lake Tunnel Project in Colorado, USA. To encompass the typical risks in underground construction, tunneling decisions are structured as a risk-sensitive Markov decision process that reflects the decision process faced by a contractor in each tunneling round. This decision process consists of five basic components: (1) decision stages (locations), (2) system states (ground classes and tunneling methods), (3) alternatives (tunneling methods), (4) ground class transition probabilities, and (5) tunneling cost structure. The paper also presents concepts related to risk preference that are necessary to model the contractor's risk attitude, including the lottery concept, utility theory, and the delta property. The optimality equation is formulated, the model components are defined, and the model is solved by stochastic dynamic programming. The main results are the optimal construction plans and risk-adjusted project costs, both of which reflect the dynamics of subsurface construction, the uncertainty about geologic variability as a function of available information, and the contractor's risk preference.}, subject = {Mehragentensystem}, language = {en} } @inproceedings{LehnerHartmann2004, author = {Lehner, Karlheinz and Hartmann, Dietrich}, title = {Scenarios for the deployment of distributed engineering applications}, doi = {10.25643/bauhaus-universitaet.147}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1476}, year = {2004}, abstract = {Although there are some good reasons to design engineering software as a stand-alone application for a single computer, there are also numerous possibilities for creating distributed engineering applications, in particular using the Internet. This paper presents some typical scenarios how engineering applications can benefit from including network capabilities. Also, some examples of Internet-based engineering applications are discussed to show how the concepts presented can be implemented.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{Lee2004, author = {Lee, Yungui}, title = {Development and application of CAD software in the field of building structures in China}, doi = {10.25643/bauhaus-universitaet.89}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-898}, year = {2004}, abstract = {PKPM series CAD software is an integrated CAD system for building design, which integrated the following parts: architectural design, structural design, building service design and statistic analysis of quantity and budget. These four parts share the same database with high efficiency. Over 80\% of design corporation in China are using PKPM series CAD software. The detailed information and some key modules of PKPM series CAD software are mainly introduced in this paper.}, subject = {Bautechnik}, language = {en} } @article{LeeLee2004, author = {Lee, Kangkun and Lee, Kijang}, title = {Additional bending moment for shear-lag phenomenon in tube structures}, doi = {10.25643/bauhaus-universitaet.247}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2472}, year = {2004}, abstract = {Framed-tube system with multiple internal tubes is analysed using an orthotropic box beam analogy approach in which each tube is individually modelled by a box beam that accounts for the flexural and shear deformations, as well as the shear-lag effects. A simple numerical modeling technique is proposed for estimating the shear-lag phenomenon in tube structures with multiple internal tubes. The proposed method idealizes the framed-tube structures with multiple internal tubes as equivalent multiple tubes, each composed of four equivalent orthotropic plate panels. The numerical analysis is based on the minimum potential energy principle in conjunction with the variational approach. The shear-lag phenomenon of such structures is studied taking into account the additional bending moments in the tubes. A detailed work is carried out through the numerical analysis of the additional bending moment. The moment factor is further introduced to identify the shear lag phenomenon along with the additional moment.}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{LauLaw2004, author = {Lau, Gloria and Law, Kincho}, title = {An Information Infrastructure for Comparing Accessibility Regulations and Related Information from Multiple Sources}, doi = {10.25643/bauhaus-universitaet.192}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1922}, year = {2004}, abstract = {This paper describes a research project that addresses the difficulties in dealing with regulatory documents such as national and regional codes. These documents tend to be voluminous, heavily cross-referenced, possibly ambiguous and even conflicting at times. There are often multiple documents that need to be consulted and satisfied; however it is a difficult task to locate all of the relevant provisions. In addition, sections dealing with the same or similar conceptual ideas sometimes lay down conflicting requirements. We propose a framework for regulation representation, analysis and comparison with emphasis on the extraction of similarities between provisions. We focus on accessibility regulations, whose intent is to provide the same or equivalent access to a building and its facilities for disabled persons. An XML regulatory repository is developed to extract structural as well as non-structural features from government regulations to help user understanding and computational analysis. A similarity analysis is performed between different sources of regulations. In order to achieve a better comparison between provisions, we employ a combination of feature matching and structural analysis. Results are shown on comparisons between American and European codes, as well as on the domain of electronic-rulemaking.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{KoenigKlingerBerkhahn2004, author = {K{\"o}nig, Markus and Klinger, Axel and Berkhahn, Volker}, title = {Structural Correctness of Planning Processes in Building Engineering}, doi = {10.25643/bauhaus-universitaet.169}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1690}, year = {2004}, abstract = {The planning of projects in building engineering is a complex process which is characterized by a dynamical composition and many modifications during the definition and execution time of processes. For a computer-aided and network-based cooperation a formal description of the planning process is necessary. In the research project "Relational Process Modelling in Cooperative Building Planning" a process model is described by three parts: an organizational structure with participants, a building structure with states and a process structure with activities. This research project is part of the priority program 1103 "Network-Based Cooperative Planning Processes in Structural Engineering" promoted by the German Research Foundation (DFG). Planning processes in civil engineering can be described by workflow graphs. The process structure describes the logical planning process and can be formally defined by a bipartite graph. This structure consists of activities, transitions and relationships between activities and transitions. In order to minimize errors at execution time of a planning process a consistent and structurally correct process model must be guaranteed. This contribution considers the concept and the algorithms for checking the consistency and the correctness of the process structure.}, subject = {Baubetrieb}, language = {de} } @article{KwakKim2004, author = {Kwak, Hyo-Gyoung and Kim, Jin-Kook}, title = {Efficient Shoring System in RC Frame Structures}, doi = {10.25643/bauhaus-universitaet.251}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2511}, year = {2004}, abstract = {In this paper, systematic analyses for the shoring systems installed to support the applied loads during construction are performed on the basis of the numerical approach. On the basis of a rigorous time-dependent analysis, structural behaviors of reinforced concrete (RC) frame structures according to the changes in design variables such as the types of shoring systems, shore stiffness and shore spacing are analyzed and discussed. The time-dependent deformations of concrete such as creep and shrinkage and construction sequences of frame structures are also taken into account to minimize the structural instability and to reach to an improved design of shoring system because these effects may increase the axial forces delivered to the shores. In advance, the influence of the column shortening effect, generally mentioned in a tall building structure, is analyzed. From many parametric studies, it has been finally concluded that the most effective shoring system in RC frame structures is 2S1R (two shores and one reshore) regardless of the changes in design variables.}, subject = {Finite-Elemente-Methode}, language = {en} } @article{KraftWilhelms2004, author = {Kraft, Bodo and Wilhelms, Nils}, title = {Interactive Distributed Knowledge Support for Conceptual Building Design}, doi = {10.25643/bauhaus-universitaet.209}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2094}, year = {2004}, abstract = {In our project, we develop new tools for the conceptual design phase. During conceptual design, the coarse functionality and organization of a building is more important than a detailed worked out construction. We identify two roles, first the knowledge engineer who is responsible for knowledge definition and maintenance; second the architect who elaborates the conceptual design. The tool for the knowledge engineer is based on graph technology, it is specified using PROGRES and the UPGRADE framework. The tools for the architect are integrated to the industrial CAD tool ArchiCAD. Consistency between knowledge and conceptual design is ensured by the constraint checker, another extension to ArchiCAD.}, subject = {Produktmodell}, language = {en} } @inproceedings{KopytoPetersenDiaz2004, author = {Kopyto, Martin and Petersen, Michael and Diaz, Joaquin}, title = {Cost and Schedule Controlling in Relation to Liquidity Management during Construction Projects}, doi = {10.25643/bauhaus-universitaet.159}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1599}, year = {2004}, abstract = {The present paper describes a software application which can be used for relating the scheduled events of a construction project with the respective financial parameters, leading to an overall improvement in general controlling and liquidity management. For this purpose, existing construction schedules are taken and details of the assignment are recorded. Thus it becomes possible to assess a future payment status should changes in the designated schedule occur.}, subject = {Baubetrieb}, language = {en} } @inproceedings{KongLiAnumbaetal.2004, author = {Kong, Stephen and Li, Heng and Anumba, Chimay and Chen, Zhen}, title = {Implementation of Web Services to Enable Interoperability of Webbased Construction Products Catalogue}, doi = {10.25643/bauhaus-universitaet.100}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1005}, year = {2004}, abstract = {This paper introduces the current development of electronic catalogues of construction products. The common system architecture of Web-based electronic products catalogues are discussed, followed by a discussion on construction products information standardization and latest distributed-systems technologies for communicating construction products information. Finally, this paper presents an implementation of Web service in e-commerce systems to enable sharing of construction products information.}, subject = {Elektronischer Produktkatalog}, language = {de} }