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Apr 26, 2012

Optimal Cable Tension Design for Cable-Stayed Bridges on Trust Region Algorithm

Publication: International Conference on Transportation Engineering 2009

Abstract

Cables are the key components for cable-stayed bridges. Optimal tension design for cable-stayed bridges is the key step of structure analysis and design, and it also is one of the key parameters of the reasonably finished state. At the same time, cable tensions directly decide the security and economical efficiency of the structure. Cable tensions were optimized for cable-stayed bridge by using the constrained optimization algorithm and the trust region algorithm which has strong global convergence with the help of MATLAB and ANSYS to call the results of the mixed programming. Optimal cable tensions of the example bridge were calculated and compared with the original design results. The results show that the optimal cable tension design by using the trust region algorithm is feasible and can be used easily for multi-scheme selection. It is especially suitable for preliminary design. By comparing the results of considering the nonlinear geometric effects or not, it can be concluded that the nonlinear geometric effects on cables can be ignored for the medium span cable-stayed bridge. The results can not only meet the precision demand of engineering design, but also simplify the calculation and improve the speed of solving.

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Go to International Conference on Transportation Engineering 2009
International Conference on Transportation Engineering 2009
Pages: 1826 - 1831

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Published online: Apr 26, 2012

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School of Civil Eng. Southwest Jiaotong University, Chendu 610031, China. E-mail: [email protected]
Yong-Zhi Dou
Road and Bridge Communications Group of Hebei province, Shijiazhuang 050000
Yong-Jiu Qian [email protected]
School of Civil Eng., Southwest Jiaotong University, Chendu 610031, China. E-mail: [email protected]

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