空间索面独塔钢箱梁斜拉桥索力优化  

Optimization of Rope Force in Single Tower Steel Box Girder Cable-stayed Bridge with Space Cable Face

作　　者：吴学义 张志国 朱建锋 WU Xueyi;ZHANG Zhiguo;ZHU Jianfeng(School of Civil Engineering,Shijiazhuang Tiedso University.Shijiazhuang 050043,China;No.6 Engineering Co.Ltd.of CR20G,Xi'an 710032,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]中铁二十局集团第六工程有限公司,陕西西安710032

出　　处：《石家庄铁道大学学报（自然科学版）》2024年第1期24-30,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：空间索面斜拉桥由于结构特殊性,索力相互影响复杂,其合理成桥索力以及施工张拉力调整是需要解决的关键问题.为对以上问题进行研究,以石家庄市学府路斜拉桥为工程背景,将结构的弯曲和拉压应变能之和最小作为目标函数,通过控制主梁的挠度、弯矩和斜拉索索力等条件,采用影响矩阵法求解了成桥索力.结合钢箱梁斜拉桥先梁后索的施工特点,研究了不同斜拉索张拉方案的可行性.结果表明,求解得到的最优索力与设计索力误差很小,索力分布合理;通过正装迭代法求解得到不同方案的斜拉索张拉力及成桥索力,分析确定了最优的斜拉索张拉方案,为工程实际提供参考.Space cable-stayed bridge has complicated interaction of cable forces because of its struc-tural particularity.Reasonable cabling force of bridge and adjustment of construction tensile force are the key problems to be solved.In order to study the above problems,the cable-stayed bridge on Xuefu Road in Shijiazhuang is used as the engineering background.By controlling the deflection,bending moment and cable-stayed cable force of the main girder,the influence matrix method is used to solve the cable-stayed cable force.Combining with the construction characteristics of steel box girder cable-stayed bridge,the feasibility of different cable-stayed tensile schemes is studied.The results show that the optimal cable forces obtained by the solution have little error with the design cable forces and a reasona-ble distribution of the cable forces.The cable tension and cable-forming forces of different schemes are obtained by the method of formal iteration,and the optimal cable tension scheme is determined by the analysis,which provides reference for engineering practice.

关 键 词：独塔斜拉桥 空间索面 索力优化 影响矩阵法 正装迭代法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]