柔性拱承式斜拉桥不对称调索技术  

Asymmetric Cable Adjustment Technology for Flexible Arch Supported Cable-Stayed Bridges

作　　者：鞠晨星 JU Chenxing(China Railway 12th Bureau Group 7th Engineering Co.,Ltd.,Changsha 410004,China)

机构地区：[1]中铁十二局集团第七工程有限公司,湖南长沙410004

出　　处：《国防交通工程与技术》2024年第1期48-51,17,共5页Traffic Engineering and Technology for National Defence

基　　金：中国铁路广州局集团有限公司科技研究开发计划(2020K039-G)

摘　　要：材质为钢材的拱承式斜拉桥拱塔柔度较大,施工过程中易受到不对称索力的影响,进而产生较大偏位。结合工程实例,介绍如何采用MIDAS/Civil及迭代法确定某受不对称索力影响的柔性拱承式斜拉桥在施工过程中的索力调整值,通过索力与线形双控对该斜拉桥进行二次调索,最终使得受不对称索力影响的柔性拱承式斜拉桥的索力达到合理状态、消除桥塔偏位。The steel arch supported cable-stayed bridge has great flexibility.This type of bridge is susceptible to the influence of asymmetric cable forces during construction,resulting in significant deviations.Combining with engineering examples,this article introduces how to use MIDAS/Civil and iterative method to determine the adjustment value of cable forces during the construction of a flexible arch supported cable-stayed bridge affected by asymmetric cable forces.Through the dual control of cable tension and linearity,the cable-stayed bridge is adjusted twice,ultimately achieving a reasonable state of cable forces and eliminating the deviation of the bridge tower.

关 键 词：斜拉桥 不对称调索 柔性拱塔 迭代法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]