Abstract

The main problem considered in this paper is the evaluation of the failure probability of a structural system with Weibull-distributed strength subjected to a dynamic random loading effect, modeled by a Gaussian stochastic process. The failure probability of the system is evaluated under these probabilistic assumptions together with the hypothesis of a Poisson distribution for the number of upcrossings of a level by the loading process. The probability of at least one upcrossing is derived with any desired accuracy. The parameter estimation of a slightly generalized Weibull distribution is also discussed. The final section is concerned with the evaluation of the failure probability of a structural system subjected to seismic excitation.

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