Optimal Design of Cable-Stayed Bridge Using Structural Analysis Software and Optimal Design Software
Date Issued
2015
Date
2015
Author(s)
Zhan, Xun
Abstract
The Cable-stayed bridge is one of the most popular bridge types chosen by architects or structure engineer in modern bridge design because of its aesthetic appeal and economy. When designing cable-stayed bridges, a lot of design variables such as cable forces, pylon height, number of cables need to be decided and it might be time consuming for engineers to consider them in detail. In addition, as cable-stayed bridges are highly undetermined with severe nonlinearity, complex and time-consuming structural analyses needs to be performed. The research mainly focuses on the optimization design of cable-stayed bridge. Design parameters are studied among 27 representative cable-stayed bridges in different classifications to provide practical design region. Initial models of optimization design for both single and double pylon configurations are proposed based on the above study. SAP2000 is used to analyze cable-stayed bridge structure because of its powerful nonlinearity ability. And SODIUMM is a flexible structure optimization software that supports SAP2000 as its structure analysis software. The B-spline technique and multi-level optimization scheme are implemented in SODIUMM and several cable-stayed bridge optimization examples are presented. The effect of B-spline and different objective functions is discussed based on the presented optimal solutions. Some simple design suggestions are made for engineers like counter weight value. Design of cable-stayed bridge is a tough task. The research is aimed at solving some specific problems of cable-stayed bridges and provide engineers an efficient way and optimization pattern for cable-stayed bridge.
Subjects
Cable-stayed bridge
Bi-level optimization
B-spline technique
Structural Optimization
Objective function
Type
thesis
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ntu-104-R02521252-1.pdf
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