Reliability Analysis of Structures under Seismic Excitation : Part III : Comparison of reliabilities obtained by first passage failure method and cumulative damage failure method

概要

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There are two evaluating methods for reliabilty of structures subjected to seismic excitation, i.e. first passage failure <(3)> and cumulative damage failure methods <(1)(2)>. By comparing the two methods, it is known that the first passage failure method evaluates the system as weaker than the other method does. This is due to a diference in the selection of failure reference value (usually static strength of material is taken as the reference value). It is made clear in the present paper that when the static strength and stress velocity are used as a function of the failure reference, the reliability of evaluation is very close to that of the cumulative damage failure.
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