基于非概率方法的碾压混凝土重力坝可靠度计算

Reliability Calculation of RCC Gravity Dam Based on Non-probabilistic Method

近年来,非概率计算方法正在被广泛应用于结构可靠度计算领域,因为该方法克服了传统方法需要较多的数据以及计算参数的概率分布等缺点.采用非概率可靠度计算方法,建立碾压混凝土重力坝和基岩的非概率可靠度指标的计算模型,并进一步探讨了基于非概率的重力坝抗滑稳定失效模式及其非概率可靠度指标.结合某碾压混凝土重力坝工程,给出了实例计算分析结果,其分析结果对非概率可靠度方法用于碾压混凝土重力坝安全评估具有一定的参考价值.

The probability theory and fuzzy mathematical method are used to deal with uncertain problems in traditional reliability analysis approaches.In recent years,the non-probabilistic calculation method is widely applied to structural reliability calculation domain because of it overcomes the defects of the current methods such as needing more data,probability distribution of parameters.Using the reliability calculation of nonprobabilistic method,the computing model of non-probabilistic reliability index for RCC gravity dam and bedrock is established;and further more,the gravity dam failure mode of stability against sliding and its nonprobabilistic reliability index are discussed and executed.Combining with a RCC gravity dam project,the calculation analysis results are given.They are a benefit for using the non-probabilistic reliability method in security evaluation of RCC gravity dams.