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.
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)
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)
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
single-tower cable-stayed bridge
space rope face
optimization of rope force
influence matrix method
orthotropic iteration method