异形斜拉桥塔梁结合段应力状态与剪力滞效应研究  

Research on the Stress State and Shear-lag Effect of Tower and Beam Joint Section of Special-shaped Cable-stayed Bridge

作　　者：罗宜 张华华 LUO Yi;ZHANG Huahua(Hubei Provincial Communications and Design Institute Co.,Ltd.,Wuhan 430051,China;Urban Construction Project Office of Yiling District,Yichang 443100,China)

机构地区：[1]湖北省交通规划设计院股份有限公司,武汉430051 [2]宜昌市夷陵区城市建设项目办公室,宜昌443100

出　　处：《交通科技》2020年第6期23-26,共4页Transportation Science & Technology

摘　　要：异形斜拉桥塔梁结合段是梁与塔之间重要的传力部位,其构造和受力复杂。文中选取某典型异形斜拉桥的塔梁结合段,采用空间有限元模型,分析其在不同局部荷载作用下的应力分布状态和剪力滞效应特点。结果表明,塔梁结合段存在极小比例的应力超过允许值,且主要集中在塔梁间几何形状突变处,对整体结构的应力状态影响很小。The structure and force of the pylon-beam junction of the special-shaped cable-stayed bridge are complex,and it is a key force transmission part between the beam and the tower.Its force characteristics provides reference for the local structure and reinforcement design.The tower and beam joint section of a typical special-shaped cable-stayed bridge is selected,and the spatial finite element model is used to analyze the stress distribution and shear lag effect characteristics under different local loads.The results show that there is a very small proportion of the stress in the pylon-beam junction exceeding the allowable value,and it is mainly concentrated at the break of geometrical figure between the pylons and beams,which has little effect on the overall structure stress state.

关 键 词：异形斜拉桥 塔梁结合段 空间有限元分析 局部应力分析 剪力滞 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.37[交通运输工程—道路与铁道工程]