斜拉桥索塔锚固区节段模型有限元分析

Finite Element Analysis of Sectional Model of Cable-pylon Anchorage Zone of Cable-stayed Bridge

斜拉桥索塔常采用小半径的U型预应力筋抵抗斜拉索产生的荷载[1]。文章建立了索塔锚固区节段的有限元模型,模拟U形预应力筋在结构中的作用。按照设计的各个工况索力进行加载,分析模型在预应力和索力荷载共同作用下的应力分布状态,取得索塔的最不利断面,对结构的安全性有重要的指导作用。

Cable-stayed bridge usually resists the load of cable by using U-shaped prestressed tendon with minor radius in the pylon. This paper builds a finite model of cable-pylon anchorage zone and simulates the effect of U-shaped prestressed tendon in the structure. The cable force is loaded according to designed data. It analyzes the status of stress distribution both with prestress and cable load in the model and gets the weakest section of pylon. It has important instructive effect for the safety of structures.