Implementation of An Optimum Algorithm for Structural Reliability Analysis Based on FEM

In order to analyse the structural reliability by stochastic finite element method rapidly and efficiently,a method combined with finite element method and gradient optimum algorithm based on ANSYS is presented when referring to the geometric interpretation of structural reliability index.(ANSYS-based) development is adopted to implement it.Results of an example demonstrate that it requires fewer FE calculations with this method compared with the design point method and Monte-Carlo simulation,achieving satisfactory accuracy.