Study of Computation for Structural Reliability Index Based on Penalty Function Method

摘要: According to the geometric meaning of structural reliability index, an unconstrained optimization model with index and design point is obtained by exterior penalty function method. The Powell method, golden section method extrapolation are used solve problem. proposed not has deal any derivative limited state function, can been obtain strong nonlinear limit which first-order (FORM) may fail converge. Three examples given compare difference methods. results show that simply, effective precise enough.