辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(10)：1047-1052,6.DOI:10.11956/j.issn.1008-0562.2017.10.008
斜拉桥索力优化的强次可行SQP法及地震分析
Cable tension optimization based on strongly feasible sequential quadratic programming method and seismic analysis of cable-stayed bridge
摘要
Abstract
In order to study the cable tension optimization problem of complex and long span cable stayed bridges and to study the influence of cable tension on seismic response of cable stayed bridges,a new strongly sub feasible SQP (Sequential Quadratic Programming) algorithm is proposed to establish a nonlinear mathematical programming model for automatic searching optimal cable forces,and the seismic dynamic analysis is carried out under different conditions.The results show that the new method is suitable for the optimization of cable tensions.The optimal cable tensions are in good agreement with the designed cable forces,and the bending moment distribution of the main girder is uniform.The main tower is mainly subjected to axial pressure,the bottom moment of the tower is small,and the deformations of the structure are much smaller than the standard limit values.The optimal cable tensions can effectively change the uneven distribution of the bending moments of the main beam,and reduce the longitudinal deformations of the main girder and the transverse deformations of the main tower so that the whole structure will be more secure under earthquake action.关键词
斜拉桥/索力优化/序列二次规划算法/自动搜索/数值模拟/地震响应Key words
cable-stayed bridge/cable tension optimization/sequential quadratic programming method/automatic search/numerical simulation/seismic analysis分类
交通工程引用本文复制引用
王桂萱,薛志强,尹训强..斜拉桥索力优化的强次可行SQP法及地震分析[J].辽宁工程技术大学学报（自然科学版）,2017,36(10):1047-1052,6.基金项目
桥梁无损检测与工程计算四川省(高校)重点实验室开放基金(2016QYJ03) （高校）
国家自然科学基金(51678100). （51678100）
