某高低塔双索面斜拉桥结构力学性能分析  

Mechanical Performance Analysis of a High and Low Tower Double Cable Plane Cable-Stayed Bridge Structure

作　　者：范振伟 FAN Zhenwei(CCCC Highway Consultants Co.,Ltd.,Haikou Hainan100088,China)

机构地区：[1]中交公路规划设计院有限公司,海南海口100088

出　　处：《北方建筑》2025年第2期63-67,共5页Northern Architecture

摘　　要：高低塔双索面斜拉桥结构受力较常规对称式双塔斜拉桥更复杂。本文详细介绍了某高低塔双索面斜拉桥主梁、斜拉索及索塔设计。根据现行规范建立了荷载组合工况,基于三维空间有限元仿真,对结构开展了静力性能分析。结果表明,原桥伸缩缝设计不满足梁端伸缩量要求,个别斜拉拉索安全系数<2.5,局部竖向支座拉应力较大,易引起脱空问题。基于三维空间有限元仿真分析,提出了结构调整建议。经过结构局部调整后,验算满足要求。本研究可为此类结构设计提供参考。The mechanical properties of high and low tower double cable plane cable-stayed bridges are more complex than those of conventional symmetrical double tower cable-stayed bridges.This paper introduces in detail the design of the main beam,stay cables,and tower design of a high and low tower double cable plane cable-stayed bridge.A load combination working condition was established according to current standards,and static performance analysis of the structure was carried out based on three-dimensional finite element simulation.The results show that the original bridge expansion joint design did not meet the requirements,and the safety factor of some cable-stayed cables was less than 2.5,and the tensile stress of local vertical supports was relatively high,which can easily cause detachment problems.Based on three-dimensional finite element simulation analysis,structural adjustment suggestions were proposed.After local structural adjustments,the verification results met the requirements.This study can provide reference for the design of such structures.

关 键 词：高低塔双索面斜拉桥 结构设计 空间有限元仿真 

分 类 号：U448.2[建筑科学—桥梁与隧道工程]