2次 모멘트法에 依한 安全性指標 解析

Safety Index Analysis with Second-Moment Method

This paper examines the effects on safety index analysis with Level Ⅱ Second-Moment Method. The general two variable problem is examined by means of Cornell safety index βc Rosenblueth-Esteva safety index βRE, Rackwitz-Fiessler safety index by iterative method and Practical FOSM safety index βp, which based partly on the concepts given by Paloheimo and Hannus, proposed the algorithm in this paper. The calculated examples have shown that safety index by Practical FOSM Method proposed in this paper would be similar to those in the method by Rosenblueth-Esteva or Rackwitz-Fissler and be simpler in calculation than the Rackwitz’s Advanced FOSM Method, in which the iterative procedure has to be used.