CABLE TENSIONING IN CABLE-STAYED BRIDGES BY COMBINATION METHOD
A method, which is combination of minimizing the total strain energy considering weight distribution of different components and minimizing the deflection of main girder, to adjusting the cable tension of cable-stayed bridges is proposed. The stiffness matrix based on structural nonlinear behavior, including the cable sag effect, the large displacement effect, and the beam-column effect, is conducted. The whole process of cables tensioning is divided into two steps. At the first step, a scheme of the cable tension is calculated by minimizing the total strain energy theory considering weight distribution; at the second step, the obtained scheme of the cable tension in the first step is taken into account as the post-tensioning cable forces, which is slightly adjusted based on the minimum nodal displacement theory. Two numerical examples are given to show the validity of the combination method suggested. Analysis results show that combination method can improve the mechanical performances of cable-stayed bridge for large-span cable-stayed bridges; however,minimum strain energy theory itself has enough precision for short-span cable-stayed bridges.
Bridges Cable-stayed Cable tensioning, Combination method
Wei Wang Wei-Lian Qu
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, P.R. China Hubei Key Laboratory of Roadway Bndge & Structure Engineering, Wuhan University of Technology, Wuhan
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1569-1573
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）