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Yusuke Y

Conceptual models for planning of building and construction systems

Abstract: Presently, Conputer Integrated Construction (CIC) is recognized as a strategy as well as a concept. for associating existing resources, technologies, processes and organizations by information integration and automaton to optimize overall construction activities and functions. However although innovative computer and automation applications to the Architectwall Engineering/ Construction (NFYC) industry are introduced, no efficient approach to implement a full scale CIC has been established. Several attempts have taken place in different areas of the AWC industry depending on specific business characteristics, which also indicate potential applications of product modeling, process inodeling and information modeling to a practical approach to the Iota1 CIC. 'nie aim of this paper is to present results of current research and development issues on conceptual models which enable interactive planning between design and construction planning focusing on building systems and construction systems.Severa1 types of conceptual models are efficiently applied to explore distributed project planning and management in several planning stages. These models also incorporate conceptual product models represented as building system models, and conceptual process models represented as construction system planning models, construction activity planning models and construction facility planning models for CIC.

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Full text: content.pdf (1,568,579 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.processing (0.047051) class.strategies (0.028122) class.represent (0.015794)
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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.


Zatar W A , Mutsuyoshii H

Logical on-line hybrid computer actuator and quasi-static testing schemes of PC columns

Abstract: A preliminary investigation of the feasibility of employing Prestressed Concrete (PC) for bridge columns in high seismicity area is conducted. Satisfactory observation encouraged the authors to verify the preliminary findings by employing a more logical realistic testing technique. A rational on-line hybrid computer actuator testing scheme of seismically vulnerable structures using multi-directional loading is developed. The scheme is utilized for testing three PC column specimens. The innovative findings verified the superior effectiveness of the idea resulting in its recommendation in the latest Seismic Design Code for Prestressed Concrete Structures, Japan. Moreover, for the sake of clarifying and modelling shear strength degradation of such prestressed bridge columns as their draft ratios increase, specimens with low strength ratios are tested using displacement-controlled quasi-static loading. By analysing the results, an insight of concrete shear strength degradation for PC columns is clarified and modelled.

Keywords: on-line hybrid testing, bridge columns, partially prestressed concrete, quasi-static testing, shear strength, displacement ductility

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Series: itaec:2003 (browse)
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Zhang Y,Al-Bataineh M,Kostelyk J,AbouRizk S

Practical applications of 3d/4d modeling, and process simulation in construction

Abstract: This paper covers the application of innovative decision support technologies on two major projects in Edmonton. The first one is the West Edmonton Sanitary Sewer (WESS) stage W12. A syphon was constructed to connect the Rat Creek Trunk to the Gold Bar Wastewater Treatment Plant across the North Saskatchewan River, which was designed to control and reduce the combined sewer overflow. The other one is the 3.3-km North LRT (Light Rail Transit) extension line, which connects the current Churchill station to the future NAIT station in Edmonton. A tunnel excavated using the Sequential Excavation Tunneling Method from Churchill station to MacEwan station in the downtown area plays a critical role in the overall project, and has significant impact on project completion date and project budget. Due to the complexity of the two projects, various 3D technologies and construction simulation models were applied to facilitate decision-making processes and project controls. 3D models were developed for design review and design conflict detection, while 4D models were established to help create a robust construction schedule. Construction sequencing animation was used to convey design intents and demonstrate construction stages to contractors and workers. Construction simulation models were developed in order to analyze different scenarios and assist in selecting the best option. The combined applications of 3D technologies and construction simulation helped the project team to identify critical issues, and assured effective communication among engineers, management, contractors, and other parties. Therefore, it provided better opportunities for the success of the projects.

Keywords: Construction management,drainage construction,design review,3D modeling,construction simulation,animation

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Series: convr:2013 (browse)
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