考虑索鞍移动的悬索桥顶推量确定方法研究  

Method for determining the pushing value of suspension bridge considering the movement of cable saddle

作　　者：田仲初 唐林平 TIAN Zhongchu;TANG Linping(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《交通科学与工程》2024年第5期15-21,共7页Journal of Transport Science and Engineering

基　　金：国家自然科学基金资助项目(52078058)。

摘　　要：基于分段悬链线理论,考虑顶推前后主索鞍绝对位置的改变,提出一种顶推量确定方法,该方法可使顶推施工后桥塔塔顶偏位达到指定值。通过有限元软件对比分析了不同顶推量下桥塔塔顶偏位的变化情况以及每次顶推主索鞍绝对位置的改变量占顶推量的比值情况,并将此方法应用到超量顶推方案顶推量的确定中。研究结果表明:基于该方法计算得到的顶推量,可以使桥塔塔顶偏位在顶推后或者顶推后某个施工阶段达到指定值。研究成果可为悬索桥索鞍顶推施工中桥塔塔顶偏位精准控制提供参考。Based on the segmental catenary theory and considering the change of absolute position of main cable saddle before and after pushing,a method for determining pushing value was proposed,which can help the bridge tower top reach the specified deviation after pushing.A comparative analysis was conducted on the changes of the top deviation of the bridge tower under different pushing values,as well as the ratio of the absolute position change of the main cable saddle to the pushing value for each pushing,by using finite element software,and the proposed method was applied to determine the pushing value of the over-pushing scheme.The results show that based on the pushing value calculated by this method,the top deviation of the bridge tower can reach the specified value after pushing or at a certain construction stage after pushing,which provides a reference for precise control of the top deviation of bridge tower in the pushing construction for cable saddle of suspension bridges.

关 键 词：悬索桥 分段悬链线理论 顶推量确定 指定偏位值 

分 类 号：U445[建筑科学—桥梁与隧道工程]