Abstract

Probabilistic safety analysis of civil engineering structures (system reliability analysis) requires the evaluation of multi-normal integrals and these multi-normal integrals can be estimated either from upper and lower bounds on these probabilities or by first-order second-moment approximate methods or by simulation methods. In this paper a new method based on conditional probabilities for the evaluation of series and parallel structural systems reliabilities is presented. Examples are studied to compare the accuracy of this new approach with other approximate methods.

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