摘要
为解决斜拉桥合理成桥状态与合理施工状态确定问题,针对某双塔叠合梁斜拉桥,采用MOPSO优化算法对其施工阶段索力进行了优化,利用Python编程语言结合有限元软件编制了基于该算法的索力自动优化程序,选取塔、梁最小弯曲应变能及主塔成桥线形为优化目标,以结构施工过程及成桥后处于安全状态和斜拉索索力总体分布均匀作为约束条件.优化结果表明,该方法能够快速搜寻得到多个优化结果,可供决策者进一步比选得到最优解;优化后的结构受力状态和主塔成桥线形合理,索力分布较为均匀,避免了成桥后的二次调索工作;并确定了双塔斜拉桥的合理成桥状态与施工状态.
The structure system of modern cable-stayed bridges is complex, and the cable forces in construction stage and completion stage directly affect the stress state and alignment of the structure. To solve the problem of reasonable completion state and reasonable construction state of cable-stayed bridge, aimed at overlapping beam of cable bridge with twin towers,the MOPSO optimization algorithm is used to optimize the cable forces in the construction stage. Python programming language and finite element software are used to compile the optimization program. The least bending strain energy of towers and beams and the alignment of main towers are selected as the optimization objectives, The construction process of the structure and the safety state after completion of the bridge should be satisfied, and the overall distribution of cable forces should be uniform. The optimization results show that the method can quickly search for multiple optimization results and further filter for decision makers. The optimized structural stress state and the main tower bridge line shape are reasonable,and the cable force distribution is relatively uniform,avoid the secondary adjustment after completed bridge,and reasonable completion state and construction state ofcable bridge with twin towers are determined.
作者
张玉平
刘雪松
李传习
ZHANG Yu-ping;LIU Xue-song;LI Chuan-xi(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2019年第2期22-27,35,共7页
Journal of Changsha University of Science and Technology:Natural Science
基金
科技部973项目(2015CB057702)
湖南省教育厅创新平台资助项目(16005)
关键词
斜拉桥
合理成桥状态
合理施工状态
粒子群优化算法
索力优化
有限元
cable-stayed bridge
reasonable completion state
reasonable construction state
particle swarm optimization algorithm
optimization of cable tensions
finite element
