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Abstract

Structural reliability analysis under the condition of limit state function unknown is the important case. Generally, Response Surface Method (RSM) is used to estimate the structural limit state function, then the Moment Methods used to serve. On account of the assumption of polynomial form, the RSM can not solve the problem with high accuracy. That is to say, the polynomial form of RSM restricts the accuracy of reliability analysis. As a semi-parameter interpolation technique, Kriging model, which can avoid the restriction and the influence of different limit state function form, could evaluate the structure response with high accuracy. Combined the Kriging model with the optimization method, the reliability index can be solved. The stability and efficiency of this method are shown in the example.