水闸闸室稳定结构体系可靠度探讨

水闸闸室结构最主要的失稳模式是滑动失稳、强度不够失稳和闸室上浮失稳.本文为了分析水闸闸室稳定性的结构体系失效概率,首先分别建立水闸闸室结构抗滑稳定性和应力强度稳定性以及抗闸空上浮的功能函数.然后利用结构可靠度分析一次二阶矩法中的验算点法分别对三种失效模式进行计算,得出四个相应的可靠度指标.将三种失稳模式视为串联系统,由界限区间法计算结构体系可靠度指标,最后由结构体系可靠度指标计算出水闸闸室稳定性的结构体系失效概率.

Discussion on the reliability of the sluice chamber structure system

The main unstable mode of sluice chamber structure includes sliding,lack of intensity and floating chamber instability.In this paper,in order to analyze the structure system failure probability,first of all,the function was established for the stability against sliding of sluice chamber structure,the stress strength stability of and anti-floating,and then using structural reliability analysis of a second-order moment Checking points in each of the three failure modes of conduct,drawn four corresponding reliability index.Three models will be seen as buckling series,calculated by the limits of range of system reliability index,the final structure of the system reliability index calculated sluice chamber stability of the structure and system failure probability.