斜拉桥索塔的可靠性分析

Reliability Apalysis of Cable-Stayed Bridge Towers

本文采用一阶二次矩法对斜拉桥索塔进行了可靠性分析，主要讨论塔架横桥向屈曲利顺桥向强度破坏两种失效模式，并以著名的法国Ｂｒｏｔｏｎｎｅ桥为例给出数值计算结果，同时对有关随机变量作参数分析，讨论其对塔架可靠度的影响。

A reliability analysis for the towers of cable-Stayed bridges is presen-ted.The analvsis uses a first-order secolid-moment method to determine the reliabil-ity index.Two major failure modes of towers, the in-plane bending and the bucklingin the direction perpendicular to the plane of the bridge,are considered.Numericalresults are given for the Brotonne bridge and studies are made of the parametricinfluence on the tower reliahility.