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.
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)
出处
《交通科技》
2020年第6期23-26,共4页
Transportation Science & Technology
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
special-shaped cable-stayed bridge
tower and beam joint section
spatial finite element analysis
local stress analysis
shear-lag effect
