斜拉桥索塔与索梁锚固区局部应力分析

Local Stress Analysis of Anchorage for Cable-stayed Bridges Based on the Finite Element Method

混凝土斜拉桥索塔、主梁常采用预应力混凝土结构,在强大的索力和预应力共同作用下,索塔、索梁锚固区受力十分复杂。针对索塔、索梁锚固区的受力状况进行研究,对优化锚固区细部构造及预应力钢束的布置均有重要意义。以一座独塔混凝土斜拉桥为例,运用有限元方法对索塔、索梁锚固区进行了空间应力分析,总结了锚固区的受力特点。

Pre-stressed concrete beams and pylons are usually adapted in concrete cable-stayed bridges.Under cable force and pre-stress,the mechanics of the anchorage is extremely complicated.Theoretical study on the mechanics of the anchorage is very important for the optimization of the structure design and arrangement of pre-stressed tendons in the anchorage zone.The spatial stress of the anchorage is calculated by finite element method.The mechanical behaviors of the anchorage are summarized and the research results can be a reference for similar bridge.