Multiple Material and Position of Supports Optimizationn Bridge Structure Design
Date Issued
2009
Date
2009
Author(s)
Hsu, Chien-Tai
Abstract
Since engineers make use of experience to design bridge structures, to be more economic, this research carries out an optimization procedure to find the design variables in the bridge structure. This research uses the optimization system developed by Li（2005）to carry out topology, sizing and shape optimization in bridge structure design. In the past, a two-step procedure is used in topology optimization and sizing, shape optimization. First, topology optimization is used to find the rough structure appearance. After that, sizing and shape optimization is used to find the detail design of bridge structure. Based on the first step, this research finds the optimal position of supports and the distribution of multiple-material. According to different kinds of remove criterion, including energy, tension, and compression, evolutionary structural optimization （ESO） can find various kinds of bridge appearance. Then combining topology and sizing, shape optimization, this research carries out a procedure to decide the connecting point and element for sizing and shape optimization. Also, a simple remove criterion is used in this research to reduce the iteration numbers. The criterion can provide results which are similar to previous researches with less iteration.
Subjects
Bridge structure design
Topology optimization
Simple remove criterion
Optimization of support positions
Optimization of multiple-mateial
Type
thesis
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