Simple method of evaluating the failure probability of a structure considering the skewness of distribution Original Research Article

This paper consists of two parts. First, we describe a structure response variability evaluation method. A two-point estimation method is useful for the evaluation of structure response variability in nuclear reactor buildings. We make it possible to take correlations into account, thus expanding the applicability of this method. Second, we propose a simple method for easily obtaining the non-exceedance probability of a non-Gaussian probability distribution from its skewness. Using this method, a reliability index taking into account the skewness of the performance function is obtained. Using these methods, we can easily evaluate the structural failure probability of a nuclear reactor building by considering the skewness of the distributions of both the random variable in the analysis model and the performance function. In this paper, we explain these methods and apply them to a nuclear reactor building as a numerical example.