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Computer aided conformance checking

Abstract: In the building process a number of problems exist with regardtobuilding regulations, causing the conformance checking process to be an island in the building process. This paper discusses an approach that enables us to perform computer aided conformance checking and to integrate the conformance checking process in the building process. The approach is based on the use of product models. This paper discusses theoretical as well as implementationaspects. The paper is an extended abstract of the Ph.D. thesis written by the author (De Waard 92).

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Full text: content.pdf (1,550,159 bytes) (available to registered users only)

Series: w78:1992 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.legal (0.035798) class.synthesis (0.030841) class.communication (0.017275)
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Permission to reproduce these papers has been graciously provided by Research Press of the National Research Council of Canada. The support of the editor, Dr. Dana Vanier, is gratefully appreciated.


Aaron S. Budge

Geotechnical Opportunities For Computer-Aided Education

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Series: w78:2006 (browse)
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Adeli, H. and Fiedorek, J.

Interactive Computer-Aided Design of Welded and Bolted Connections in Steel Buildings

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Series: w78:1986 (browse)
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Ahmed Laaroussi, Bruno Fiès, Rémi Vankeisbelckt, Julien Hans

Ontology-aided FMEA for construction products

Abstract: The goal of improving the quality and the maintenance of building products, and the will to integrate the sustainable development objectives led us to propose an original method based on the use and adaptation of the Failure Modes Effects and Criticality Analysis (FMEA). This method relies among others on ontology use. It facilitates the FMEA proceeding. This paper aims to introduce innovative software specifically developed to perform more easily FMEA on building components. This software takes advantages of a structured knowledge base and an inference rule engine that allow a complete and formal description of the product to be analysed and an exhaustive analysis of all failures (degradations) that may occur.

Keywords: FMEA, ontological approach, knowledge capitalisation, degradation analysis, construction product

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Series: w78:2007 (browse)
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Ahmed Sherif and Hosnachah Mekkawi

Developing A Computer-Aided-Learning Tool For Teaching Construction Engineering Decision Making

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Series: w78:2006 (browse)
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Alarcon L F, Bastias A

Computer aided strategic planning

Abstract: Modelling concepts developed to analyse project strategic decisions have been extended and implemented in a computer system leading to a generalised methodology that allows modelling and evaluation of strategic decisions in almost any decision area. Some recent application areas of this modelling system are: strategic planning, evaluation of environmental policy impacts and evaluation of risks in owner contractor relationships . The system uses concepts of cross-impact analysis and probabilistic inference as the core of the analysis procedure. A modular model structure and a simplified knowledge acquisition procedure has been designed to avoid the excessive cognitive demands imposed to the users by the original cross-impact methodology. A simple questioning process is used to guide the discussion and elicit information in an ordered manner. The result is a powerful but easy to use computer modelling system where managers, or other potential users, are not exposed to the complexities of the mathematical model. The computer system is implemented in a Windows 95 platform and it provides a graphical interface to help the users in building a conceptual model for the decision problem. The model is a simplified structure of the variables and interactions that influence the decisions being analysed. Influences and interactions assessed by experts or decisions makers are stored in a knowledge base. The system provides powerful analysis capabilities, such as: sensitivity analysis, to identify the most important variables in the decision problem; scenario analysis, to test decision under different environmental conditions; prediction of selected performance outcomes; risk analysis, to identify the risk involved in different alternatives; comparative analysis of the effects of alternative actions on individual or combined performance measures; explanatory capabilities through the model causal structure; etc. The computer model can translate expertise collected from multiple experts into a prediction of significant outcomes for decision-making. The model allows management to test different combinations of options and predict expected performance impacts associated with the decisions under analysis. The use of this decision-support tool can provide valuable insights on alternative options for strategic decision-making

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Full text: content.pdf (360,296 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.strategies (0.068425) class.impact (0.056619) class.environment (0.054697)
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Permission to reproduce these papers has been graciously provided by Royal Institute of Technology, Stockholm, Sweden. The assistance of the editors, Prof. Bo-Christer Björk and Dr. Adina Jägbeck, is gratefully appreciated.


Alekhin V,Antipin A,Gorodilov S,Khramtsov S

Numerical simulation of wind loads on high rise buildings

Abstract: Article presents a methodology of the numerical simulation of the wind on high-rise buildings, which was developed by the Department of Computer-aided design of structures of the Ural Federal University named after the first President of Russia B.N. Yeltsin. Paper includes the results of researches on development of a technique of determination of wind pressure upon high-rise buildings by means of numerical modeling in an ANSYS package. The investigation was carried out within the grant of the Russian Academy of Architecture and Building Sciences. The results are applied to calculation of wind pressure upon a number of high-rise buildings under construction in Yekaterinburg City (Russia). Simulation is performed in the program ANSYS. The simulated building is placed in a domain that is the numerical analogue of wind tunnel. Domain sizes are chosen in such a way that simulated buildings do not affect the flow of air on its boundaries. Shear stress transport (SST) turbulence model has been used. This model effectively combines the stability and accuracy to the standard k-? model in the areas, which are placed near the walls and the effectiveness of the k-e model at a distance from the walls with a smooth transition between them (input expansion functions). For the numerical solution of the governing equations the finite volume method was used (FVM). The scale of the turbulence is assumed to be 200-300m. Use of the developed technique is shown on the example of calculation of wind pressure and wind velocities in pedestrian area for high-rise building under construction in the City of Ekaterinburg.

Keywords: high-rise building,wind impact,simulation,wind loads

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Series: convr:2013 (browse)
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Alexander J, Coble R, Crawford J, Drogemuller R, Leslie H, Newton P, Wilson B, Yum Kwok-Keung

Information and communication in construction : closing the loop

Abstract: Both nationally and internationally, the architecture, engineering and construction (AEC) sector is highly fragmented : it is dominated by small and medium-sized enterprises (SMEs), the nature of information and knowledge can be dispersed among firms and organisations, and consortia are frequently formed from geographically dispersed firms. In recognition of the potential improvements to be gained through an integrated approach to project information used throughout the design, documentation, construction and operation processes, substantial research is underway in Australia to "close the loop" of information flows between designers and constructors. The paper will explore and discuss both the technology platform in terms of information and communications technology (mobile, high-speed and wide area networking linking the design and engineering offices with the construction site) and the information platform in terms of the content of communications between project stakeholders and the requisite information (traditional spatial as well as non-spatial data) of key concern to the stakeholders at various stages of the project lifecycle. The paradigm shift that has occurred over recent years from stand-alone personal computing (which reinforced fragmentation) to mobile and Wide Area networked computing now provides a platform capable of promoting integration, accessibility and co-operation within the sector with attendant gains in efficiency. A minimum requirement to achieve these gains is access to the right information (not just simple data) at the desired level of scale and detail for a particular stakeholder’s view - information which once collected can be stored and refined and then held for use elsewhere on the project without loss and without the need for subsequent re-entry. The information needs to be available quickly and easily, that is at the right time and in the right location for maximum benefit and project efficiency. Demonstration collaborative systems to support interactive Computer Aided Design and information exchange between project stakeholders such as architects, various engineers (electrical, hydaulic, mechanical, structural) and project managers, in an innovative collaborative manner have become available to bring dispersed project members together electronically. Such systems allow project members attached to a network to undertake a range of information access and exchange from simple e-mail; through on-site access to central project data sources via handheld computers; right through to the use of optional live (or pre-recorded) video to enhance collaboration. Using communications infrastructure, this functionality can be shared in various ways - in a corporate-wide environment between regional and/or interstate offices within a company, or in a consortium situation (between offices of a consortium working together on a specific construction project). The questions then arise as to how such systems fit into industry practice, and how the industry might adapt to embrace new opportunities provided by such technological advances. Ease of access to up-to-date, accurate project information for a range of project stakeholders is being extended through research in the US and Australia to close the loop between some of the stakeholders, and this will be discussed in detail in the paper. As well, the progress of industry-based support for a level of interoperability for building and construction information by organisations such as the International Alliance for Interoperability (IAI Australasian chapter) will also be discussed, plus the likely impact of the adoption of Industry Foundation Classes in the Australian building and construction industry in areas such as the design life for buildings based on durability of materials.

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Full text: content.pdf (719,511 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.057235) class.environment (0.023003) class.synthesis (0.022896)
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Permission to reproduce these papers has been graciously provided by Royal Institute of Technology, Stockholm, Sweden. The assistance of the editors, Prof. Bo-Christer Björk and Dr. Adina Jägbeck, is gratefully appreciated.


Anadol Z, Akin O

Determining the impact of CADrafting tools on the building delivery process

Abstract: Computer aided design (CAD) is intended to change the way design and construction are carried out. At a minimum, this implies savings realized in terms of time spent and improvement of the quality of designs produced. To test this idea, we hypothesized that computer aided drafting and design operations may be instrumental in reducing the number of change orders issued and help control cost overruns by improving the accuracy of construction documents. We compared change orders in projects designed in the conventional media against ones developed with computers. We found that there is evidence supporting our hypothesis. Furthermore, in the process of investigating this question, we found that computer applications to improve the management of existing building information (as-built drawings, building system related information, and the like) represent even more critical needs than those that can reduce change orders through more accurate design drawings.

Keywords: drawing accuracy; change orders; design errors; as-built drawings; scope changes

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Full text: content.pdf (480,311 bytes) (available to registered users only)

Series: w78:1993 (browse)
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Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


Anshuman S, Kumar B

Architecture and HCI: a review of trends towards an integrative approach to designing responsive space

Abstract: Recently, trends in integrating dynamism and response in Computer Aided Architectural Design have been in vogue. Attempts to attach dynamic forces to vector objects and thereby breeding amorphous elements and responsive environments are demonstrated through numerous design proposals in recent times, where design concepts are represented as active systems of forces affecting CAD objects; turning them into responsive amorphous organisms. This intention is compromised once such active forms are translated into built objects from the simulations, which largely remain inert. On the other hand, recent concepts in Human Computer Interaction (HCI) and pervasive computing, have demonstrated relevance in physical objects and spaces; turning them into elements of physical interface to mediate particular human actions, aspects of communication, entertainment and aesthetic expression. While responsiveness grows as a concern amongst architects, allowing HCI features and computational schemes to become integral processes and parameters within architectural design may provide design processes with new approaches to architectural production. This may, in turn, alter the resultant architectural schemes and their behavior. This paper reviews relevant developments that contribute to such potential to inform physically responsive environments and scopes their integration in heterogeneous architectural design processes.

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Series: itaec:2004 (browse)
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