基于响应面法的拱坝结构可靠度研究  

Application of RSM in reliability analysis of arch dam structure

作　　者：陆军[1] 武清玺[1] 

机构地区：[1]江苏省交通科学研究院有限公司,江苏南京211112

出　　处：《广西水利水电》2011年第1期1-4,8,共5页Guangxi Water Resources & Hydropower Engineering

摘　　要：针对拱坝构造复杂,基岩和筑坝材料具有非线性特性,可靠度分析十分困难的问题,将可靠度计算的响应面法与拱坝应力分析的有限元法相结合分析坝体的可靠度,即:坝体应力与变形的计算采用三维非线性有限元法,可靠度计算采用二次响应面法。以福建省永泰县大洋水电站拱坝为例,分析了该拱坝上游面和下游面的可靠度,得出了可靠指标的变化规律。与其他可靠度分析方法相比,该方法可以直接应用确定性结构的计算程序,使得可靠度分析工作简便易行,为大型复杂结构的可靠度分析展现出良好的应用前景。The complicated structure and the nonlinear properties of foundation rock and constructing materials renders much difficulties for the reliability analysis of arch dam.An introduction was made on the combined method,i.e.3D nonlinear finite element method is applied to calculate stress and deformation of dam body while two_order RSM is adopted for reliability analysis.Taking the arch dam of Dayang Hydropower Station located in Yongtai County,Fujian Province as example,the variation rule of reliability index was obtained based on reliability calculation of upstream and downstream dam faces.Compared with other reliability analysis methods,the proposed method permits convenient analysis work since the calculation program for deterministic structure can be used directly,showing vast ranges of prospects for its application in reliability analysis of large_scale and complex structures.

关 键 词：水工结构 混凝土拱坝 响应面法 有限元法 可靠度分析 

分 类 号：TV642.4[水利工程—水利水电工程] TU311.2[建筑科学—结构工程]