水口船闸二闸室结构可靠度分析

Structural reliability analysis on the second chamber of Shuikou shiplock

针对水口船闸闸室结构加固问题 ,将钢筋混凝土非线性随机有限元应用于工程实际 ,就钢筋混凝土结构裂缝宽度的计算提出了合理而又便捷的算法。经过对水口船闸二闸室设计结构承载力极限状态下点的可靠度分布分析 ,找出了薄弱部位 ,并在此基础上进行正常使用极限状态限制裂缝宽度条件下的体系可靠度计算 ,结果表明正常使用极限状态的可靠度对原结构的安全性起控制作用 ,为闸室结构加固提供了可靠的依据。

In the light of structural reinforcement of Shuikou shiplock chamber, non linear stochastic FEM of reinforced concrete is applied to its analysis, and a reasonable and convenient computational method for the crack opening of reinforced concrete structure is put forward. Through the analysis of point reliability level distribution on the second chamber of Shuikou shiplock under the limit load capacity ,the weak regions are found out. On this basis, the reliability level computation and analysis on the chamber system under the limit state of normal operation condition with limited crack opening are carried out. The computational results demonstrate that the reliability level under the limit state of normal operation condition controls the safety of the original structure, and provides the reliable basis for the structural reinforcement of Shuikou shiplock chamber.