重力坝坝基深层抗滑稳定模糊随机可靠度分析

Reliability Analysis of the Stability of a Gravity Dam Foundation Based on Fuzzy Random Method

根据经典可靠度理论计算方法在重力坝抗滑稳定分析中的应用,深入考虑影响结构稳定性的基本变量模糊性以及失稳准则模糊性,得到重力坝模糊随机可靠度计算模型。该文选用当量转换的方法处理模糊变量;采用水平截集的方法处理失稳准则模糊性。应用工程算例验证,模糊随机可靠度方法在重力坝抗滑稳定分析中的合理性。

Considering the fuzziness of physical and mechanical parameters and stability limit state,the fuzzy random reliability method of gravity dam stability analysis calculation is adopted in this paper based on multi-slide surface gravity deep stability solution. For randomness basic variables,it transformed fuzzy variables to random variables using the equivalent; and the limit state of ambiguity is described by the form of membership based on fuzzy statistics experiments and expertise. The case study shows that the fuzzy random reliability analysis method is a new method which is more reasonable to evaluate the situation of gravity dam stability.