An improved adaptive response surface method for structural reliability analysis  

作　　者：刘霁 李云 

机构地区：[1]School of Civil Engineering and Mechanics,Central South University of Forestry and Technology [2]College of Civil Engineering,Hunan City University

出　　处：《Journal of Central South University》2012年第4期1148-1154,共7页中南大学学报（英文版）

基　　金：Project(50774095) supported by the National Natural Science Foundation of China;Project(200449) supported by National Outstanding Doctoral Dissertations Special Funds of China

摘　　要：The response surface method(RSM) is one of the main approaches for analyzing reliability problems with implicit performance functions.An improved adaptive RSM based on uniform design(UD) and double weighted regression(DWR) was presented.In the proposed method,the basic principle of the iteratively adaptive response surface method is applied.Uniform design is used to sample the fitting points.And a double weighted regression system considering the distances from the fitting points to the limit state surface and to the estimated design points is set to determine the coefficients of the response surface model.Compared with the conventional approaches,the fitting points selected by UD are more representative,and a better approximation in the key region is also observed with DWR.Numerical examples show that the proposed method has good convergent capability and computational accuracy.The response surface method （RSM） is one of the main approaches for analyzing reliability problems with implicit performance functions. An improved adaptive RSM based on uniform design （UD） and double weighted regression （DWR） was presented. In the proposed method, the basic principle of the iteratively adaptive response surface method is applied. Uniform design is used to sample the fitting points. And a double weighted regression system considering the distances from the fitting points to the limit state surface and to the estimated design points is set to determine the coefficients of the response surface model. Compared with the conventional approaches, the fitting points selected by UD are more representative, and a better approximation in the key region is also observed with DWR. Numerical examples show that the proposed method has good convergent capability and computational accuracy.

关 键 词：response surface structural reliability uniform design weighted regression 

分 类 号：TU311.2[建筑科学—结构工程]