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论文类型：期刊论文

发表时间：2012-08-01

发表刊物：Journal of Shanghai Jiaotong University（Science)

收录刊物：EI

卷号：17

期号：4

页面范围：415-420

摘要：The first order reliability method (FORM) is widely adopted for structural reliability evaluation due to its numerical efficiency. Concerning the issue of FORM often failing to converge when the limit state function (LSF) behaves high nonlinearity, a new iteration scheme called 'rotated gradient algorithm (RGA)' is proposed and combined with Kriging model to evaluate the reliability of implicit performance function. In this paper, the Kriging model is applied to approximate the real LSF first. Then the scheme of RGA, constructed in terms of gradient information of two adjacent design points obtained during the process of calculation, is used to calculate the reliability index. Numerical examples show the validity in convergence and accuracy of the proposed method for arbitrary nonlinear performance function. © Shanghai Jiaotong University and Springer-Verlag Berlin Heidelberg 2012.