Framework for Multiobjective Optimization of Launching Girder Bridges
Publication: Journal of Construction Engineering and Management
Volume 135, Issue 8
Abstract
A framework is presented for optimizing the construction of decks of bridges using launching girder systems. The framework assists contractors in performing a time-cost trade-off analysis to optimize the use of resources. The proposed framework consists of three main components which interact in a cyclic manner. These components are simulation, optimization, and reporting modules. Processes and tasks of launching girder systems are described in order to illustrate the mechanism of the simulation module which utilizes STROBOSCOPE as a general purpose simulation language. The developments made in the optimization module are extensively detailed. The optimization module uses ant colony optimization and it accounts for seven optimization variables; location of casting yard, time lag, number of casting forms, number of preparation platform, curing method, number of yard reinforcement crews, and number of stressing crews. Two optimization approaches are coded in the optimization module in two algorithms (ant colony multiobjective optimization I and II) to carry out multiobjective optimization. These are function-transformation and modified distance approaches. A numerical example is presented to illustrate the practical use of the developed framework.
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Information & Authors
Information
Published In
Journal of Construction Engineering and Management
Volume 135 • Issue 8 • August 2009
Pages: 791 - 800
Copyright
© 2009 ASCE.
History
Received: Jan 30, 2007
Accepted: Feb 19, 2009
Published online: Jul 15, 2009
Published in print: Aug 2009
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