混凝土自锚式悬索桥主缆锚固区应力分析

Analysis on Stress in Main Cable Anchorage Zone of Concrete Self-anchored Suspension Bridge

混凝土自锚式悬索桥主梁通常采用预应力混凝土结构,在强大的索力和预应力、支反力的共同作用下,主缆锚固区的受力状况十分复杂。针对主缆锚固区的受力状况进行研究,对优化锚固区的细部构造和预应力钢束布置均有重要意义。该文以张家港镇山大桥为例,运用有限元方法对主缆锚固区进行空间应力分析,总结了此类桥梁主缆锚固区的受力特点。

The main beam of concrete self-anchored suspension bridge is commonly the pre-stressed concrete structure.Under the combined action of the strong cable force,pre-stressing and supporting counter force,the stress status of the main cable anchorage zone is very complicated.Aiming at the stress status of the main cable anchorage zone to be studied,it is significant to optimize the detail structure of anchorage zone and the layout of pre-stressed steel beam.Taking Zhangjiagang Zhenshan Bridge as an example,the article analyzes the space stress of the main cable anchorage zone by the finite element method,and sums up the stress characteristics of the main cable anchorage zone of this bridge.