浅基础沉降可靠性的摄动随机有限元法  

Perturbation stochastic finite element method for reliability analysis of settlement of shallow foundations

作　　者：闫蓉[1] 茜平一[2] 傅旭东[1] 

机构地区：[1]武汉大学土木与建筑学院,湖北武汉430072 [2]广东水利电力职业技术学院,广东广州510635

出　　处：《岩土力学》2004年第12期1947-1950,共4页Rock and Soil Mechanics

摘　　要：将二阶非线性摄动随机有限元理论和土性参数随机场的离散技术相结合,可以处理岩土工程中由多种不确定因素带来的结果的不确定性。与一阶摄动随机有限元相比,二阶摄动随机有限元具有较高的计算精度。笔者探讨了这一方法,考虑土性分布参数和荷载变异性,用二阶摄动随机有限元法进行了浅地基沉降的概率分析。Second-order nonlinear perturbation stochastic finite element theory can be combined with the technique of random field discretization of soil properties to solve the problem of uncertainty resulting in geotechnique. Compared with first-order perturbation, second-order perturbation stochastic finite element has the advantage of higher accuracy. This study calculated the statistical moments of settlement for shallow foundation by using second-order perturbation stochastic finite element method.

关 键 词：非线性 摄动 随机有限元 随机场 

分 类 号：TU45[建筑科学—岩土工程]