基于Kriging-RSM框架结构整体承载能力抗震可靠度分析  

Seismic reliability analysis of overall bearing capacity of frame structure based on Kriging-RSM

作　　者：狄生奎[1,2] 张宝 王立宪[1,2] DI Sheng-kui;ZHANG Bao;WANG Li-xian(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Education Ministry,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,兰州730050

出　　处：《沈阳工业大学学报》2021年第2期213-219,共7页Journal of Shenyang University of Technology

基　　金：国家自然科学基金项目(51608245).

摘　　要：针对整体结构在地震作用下的可靠度计算问题,基于克里金模型(Kriging)与响应面法(RSM),提出了计算结构可靠度指标的Kriging-RSM算法.在中心复合设计法产生样本点的基础上,建立钢筋混凝土框架有限元模型,进行非线性推覆分析,分别计算了不同设计基本地震速度下框架结构的整体可靠度指标与灵敏度.结果表明:Kriging-RSM算法具有较高的精度和计算效率,是结构整体可靠度计算的一种新方法;设计基本地震加速度能够影响结构整体可靠度指标,但不会改变各随机变量的灵敏度.In order to solve the reliability calculation problem for the overall structure under seismic action,according to the Kriging model and response surface method(RSM),a Kriging-RSM algorithm was proposed to calculate the structure reliability index.Finite element models for the reinforced concrete frame were established on the basis of central composite design method for sample points,and the nonlinear Pushover analysis was conducted.The overall reliability index and sensitivity of frame structure were calculated with basic seismic velocities obtained by different designs.The results show that the Kriging-RSM algorithm has relatively higher accuracy and calculation efficiency,and is a novel method for calculating the overall reliability of frame structure.The design of basic seismic acceleration can affect the overall reliability index of structure,but does not change the sensitivity of random variables.

关 键 词：可靠度 灵敏度 克里金模型 响应面法 非线性推覆分析 中心复合设计法 承载能力 框架结构 

分 类 号：TU[建筑科学]