Optimization on Stay Cables Initial Tension Force for Extradosed Cable-Stayed Bridge

摘要：

Initial tension force of stay cables have large influence on mechanical performance for extradosed cable-stayed bridges (ECSB) at state of completed bridge. The paper defines relationship between structural members internal force and initial tension force of stay cables based on influence matrix method. Setting the minimum potential energy of whole structure as objective function, the optimal model of quadratic linear programming for initial tension force of stay cables is presented. Embedded the optimal model in general finite element program, optimal soft for initial tension force of ECSB stay cables is programmed and named CBOP. Using the optimal program to a two spans ECSB, the maximum positive and negative moment of girder are decreased 14％ and 49％ respectively while total initial tension force only increased 8％, meanwhile the girders moment distribution is more homogeneous along girder. The optimal method and program is useful and effective to determine and adjust of initial tension force of stay cables for ECSB.

关键词： extradosed cable-stayed bridge optimization initial tension force gradient projection method

作者: Peng-Zhen LIN

作者单位: Key Laboratory of Road Bridge and Underground Engineering of Gansu Province,Lanzhou Jiaotong University, Lanzhou, Gansu P.R. China 730070

会议类型: 国际会议

会议名称: The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)

会议地点: 无锡

会议语种:英文

页码: 302-305

在线出版日期: 2010-06-04（万方平台首次上网日期，不代表论文的发表时间）