RF法の初期点を全象限の限界状態曲面上に定める設計点探索法の研究

抄録

This study describes an efficient application of Rackwitz Fiessler algorithm to search out all of design points, utilized in the importance sampling simulation to estimate structural failure probabilities. Specify several initial points to execute Rackwitz Fiessler algorithm in respective quadrants of the basic random variables space and all of possible design points are determined. Numerical example to estimate the failure probability of structural system with nonlinear limit state function by the multimodal importance sampling simulation utilizing all of design points determined by the proposed method is presented to illustrate the proposed method contribute to give accurate estimation effectively.