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_id 1ac6
authors Cheng, Min-Yuan and Chen, Jiann-Chyun
year 2001
title Integrating barcode and GIS for monitoring construction progress
source Automation in Construction 11 (1) (2002) pp. 23-33
summary This study focuses on developing an automated schedule monitoring system for precast building construction. Erection of prefabricated structural components is the major critical activity for precast building construction. An efficient lifting schedule and control plan can significantly reduce construction conflicts and project delay. In this research, the system ArcSched was developed to assist engineers in controlling and monitoring the erection process in a real time basis. ArcSched is composed of a Geographic Information System (GIS) integrated with a database management system. Through systematic monitoring of the construction process and representation of the erection progress in graphics and colors, the scheduled components for erection are repetitively tracked and well controlled to implement the lifting schedule as planned.
series journal paper
last changed 2003/05/15 19:22

_id 7082
authors Dawood, N.
year 1999
title A proposed system for integrating design and production in the precast building industry
source The Int. Journal of Construction IT 7(1), pp. 72-83
summary The UK construction industry is going through a major re-appraisal, with the objective of reducing construction costs by at least 30% by the end of the millennium. Precast and off-site construction are set to play a major role in improving construction productivity, reducing costs and improving working conditions. In a survey of current practices in the prefabrication industry, it was concluded that the industry is far behind other manufacturing-based industries in terms of the utilisation of IT in production planning and scheduling and other technical and managerial operations. It is suggested that a systematic, integrated, computer-aided, approach to presenting and processing information is needed. The objective of this paper is to introduce and discuss the specifications of an integrated intelligent computer-based information system for the precast concrete industry. The system should facilitate: the integration of design and manufacturing operations; automatic generation of production schedules directly from design data and factory attributes; and generation of erection schedules from site information, factory attributes and design data. It is hypothesised that the introduction of such a system would reduce the total cost of precasting by 10% and encourage clients to choose precast components more often.
series journal paper
last changed 2003/05/15 19:45

_id 2036
authors Dzeng, R.J.
year 1995
title Caseplan: A Case-based Planer and Scheduler for Construction Using Product Modeling
source University of Michigan
summary Construction planning and scheduling are important to contractors for estimating the cost and duration of a project they are to bid on and construct. Many projects specify incentive and disincentive clauses for completing projects early and late. The timely completion and success of a project rely on good planning and scheduling. Contractors who repeatedly build the same kind of facilities acquire experience in scheduling the needed construction work. When parts of a facility's design are copied from one project to the next, the previously developed schedules could possibly be reused to schedule future work. This dissertation presents a construction planner and scheduler, named CasePlan, that automates the planning and scheduling process through the use of experience encoded in cases. CasePlan enables a contractor to specify a facility design using a product model, describe the relationships between product components and parts of a schedule (e.g., activity subnetworks, construction crews), and store this information as a case. As a decision support tool, CasePlan enables the contractor to search for cases whose facility designs are similar to that of a new project. The similarity assessment is based on the relative importance values that the contractor assigns to the components and their attributes in the product model. As an automation tool, CasePlan creates the schedule of a new project by reusing parts of the schedules whose associated designs are most similar to that project's design. The result is a schedule in which construction alternatives are chosen from those used in previous cases based on the new project scheduling constraints. The contractor / system-user can interact with CasePlan during its operation or modify the resulting schedule to add detail needed for executing the schedule in the field. Two types of construction projects have been studied for the development of CasePlan. One is the Kit-of-Parts post offices, in which designs are made by reusing design modules defined as Parts. The other is the boiler erection for fossil-fueled power plants, in which the design process is standardized and component configurations are similar across designs. These projects were chosen because their schedules are similar within each project type, which suggested that practitioners had a high incentive and were likely to reuse schedules. CasePlan's similarity assessment for boiler erection projects was validated using a survey. CasePlan's schedules and usability was subjectively evaluated also by the interviewed professionals.
series thesis:PhD
last changed 2003/02/12 21:37

_id ddss9433
id ddss9433
authors Gorp, L.F.M. van, Gelder, J.T. de and Steenhuis, C.M.
year 1994
title A Functional Approach to Conceptual Modelling of Steel Structures
source Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary The life cycle of a steel structure can be divided into six main stages: design, detailing, manufacturing, erection, maintenance and demolition. For each stage, a different party is responsible,often using its own automation aids to assist its specific task. Since all parties operate on the same steel structure, there is a need for integration between the islands of automation. Most of the developments in this area, including ISO/STEP, are directed towards the development of conceptual models carrying all relevant information through the life cycle of the product. The conceptual models are developed following a probabilistic approach. In this approach, a conceptual model is inductively developed by analyzing and modelling empirical similarities. In this paper we explain the problems resulting from following a probabilistic modelling approach by presenting its consequences. This is illustrated by the logical product model developed in Eureka project "CIMSteel". A potential solution to these problems is proposed by presenting a functionalapproach to the development of an integrated system for design, detailing and manufacturing of steel structures. The strength of this approach is illustrated by a simple example.
series DDSS
last changed 2003/08/07 14:36

_id b0e0
authors Martens, Bob
year 1991
source Proceedings of the 3rd European Full-Scale Modelling Conference / ISBN 91-7740044-5 / Lund (Sweden) 13-16 September 1990, pp. 44-52
summary Since 1977 the Institut für Raumgestaltung ('Architectural Styling of Space') had been trying to set up a full-scale laboratory designed for teaching and research purposes. The aim was even more so invigorated by the International Architecture Symposion "Man and Architectural Space" organized by our institute (1984).
keywords Full-scale Modeling, Model Simulation, Real Environments
series other
type normal paper
last changed 2004/05/04 13:17

_id 27e8
authors Rasdorf, William J. and High, Stacey L.
year 1987
title Simplified Steel Compression Member Design
source Dynamics of Structures ASCE Structures Congress Proceedings. 1987. American Society of Civil Engineers, vol. D: pp. 352-367. CADLINE has abstract only
summary The American Institute of Steel Construction 'Specification for the Design, Fabrication, and Erection of Structural Steel Buildings' has made manual steel column design exceedingly time consuming and difficult. The objective of this paper is to present a simplified method of designing steel columns subjected to axial loads and moments for use in situations where automated design methods are inappropriate. Steel column design is based on the interaction equations of the AISC Specification. These equations are presented in terms of actual and allowable stresses and much time is required by a designer to manually determine the stresses and solve the equations. To simplify their solution, the interaction equations were reformulated and a set of parameters (multipliers) was introduced into them. The parameters were investigated to determine their validity, limits, and ranges of significant influence. They were then tabulated to provide quick and easy access for use. The modified interaction equations and the tabulated parameters constitute the results of this study. They are the physical tools that enable a designer to rapidly select initial steel column sections to satisfy design requirements and specification constraints. The analysis confirms that these tools can realistically and accurately be determined. The equations were algebraically derived and the tables were generated as a function of the properties of the sections. Thus, a new design method, combining the use of tabulated parameters with algebraically modified interaction equations, has been developed. This method greatly simplifies and speeds up the column section selection process
keywords civil engineering, structures, synthesis, design, methods
series CADline
last changed 2003/06/02 11:58

_id ae20
authors Retik, A., Warszawski, A. and Banai, A.
year 1989
title The Use of Computer Graphics as a Scheduling Tool
source Building and Environment. England: Pergamon Press, 1989. 10 p. : ill. includes bibliography
summary The paper describes a potential application of computer graphics to construction scheduling. A computer program receives, as its input a geometrical representation of the building to be constructed, and a schedule for the erection of its main components. Subsequently, the actual construction progress is also recorded. The outputs of the program include a graphical representation of the total schedule, of the construction status at any given date, and of the difference between the scheduled and the actual performance. Other possible features of the program are also discussed
keywords computer graphics, construction, scheduling
series CADline
last changed 2003/06/02 12:41

_id ddssar9636
id ddssar9636
authors Will, B.F., Wong, W.C.H. and Chu, C.H.
year 1996
title A Case Study of Hypermedia Applications in the Building Industry: Curtain Wall Design, Fabrication and Erection
source Timmermans, Harry (Ed.), Third Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings (Spa, Belgium), August 18-21, 1996
summary This paper is based on the development of a Hypermedia Information Delivery System called ArchiSpace, by the Department of Architecture, The University of Hong Kong to produce a comprehensive knowledge of a Curtain Wall system. A set of construction drawings of the building were analysed and converted to the 3D hypermedia system format. The focus of this study is the use of the hyper-model environment in information organization and once the 3D hypermedia system is formed the information on the curtain wall system is accessed by the use of hyper-text environments hyper-image environments, and hyper-model environments. The paper analysed that the hyper-model access method seems to be more appropriate than the hyper-text and hyper-image access methods for users who do not have any knowledge pre-requisites. The results obtained by this research are being applied to improve the user friendliness for information access within a hyper-model environment.
series DDSS
last changed 2003/08/07 14:36

_id caadria2018_165
id caadria2018_165
authors Yuan, Philip F., Chai, Hua and Jin, Jinxi
year 2018
title Digital Form-Finding and Fabrication of Strained Gridshells with Complex Geometries
source T. Fukuda, W. Huang, P. Janssen, K. Crolla, S. Alhadidi (eds.), Learning, Adapting and Prototyping - Proceedings of the 23rd CAADRIA Conference - Volume 1, Tsinghua University, Beijing, China, 17-19 May 2018, pp. 267-276
summary Strained gridshells has been one of the most efficient structure system to cover large spans by lightweight construction. Nevertheless, gridshells structure has been seldom used due to the difficulties in gridshells form-finding and erection, as well as its limitation of morphological possibilities. In this regard, this paper aims to provide an integrated design and fabrication approach for extending the application of strained gridshells into the field of complex geometries. First, a form-finding method for complex gridshells design was put forward and tested taking Enneper surface as examples; secondly, the form-finding result was further developed into a gridshells system consisting of continuous laths, rotatable joints and rigid edge beams, which were optimized afterwards based on the structural simulation result with Finite Element Analysis. Third, the construction difficulties of this system were fully addressed in the robotic fabrication and erection process of a full scale prototype. This research tries to fully combine the structural characteristics of the strained gridshell with digital fabrication technologies to extend the application of strained gridshells into structures with more complex geometries.
keywords Strained Gridshell; Computational Form-finding; Structural Optimization; Robotic Fabrication
series CAADRIA
last changed 2018/05/17 07:08

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