软粘土地基非线性一维大变形固结的有限差分法分析  

One-dimensional Non-linear Large Deformation Consolidation Analysis of Soft Clay Foundation by FDM

作　　者：刘祚秋[1] 周翠英[1] 

机构地区：[1]中山大学应用力学与工程系∥中山大学地下工程与信息技术研究中心,广东广州510275

出　　处：《中山大学学报（自然科学版）》2005年第3期25-28,41,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(59809037);广东省自然科学基金资助项目(980274);广东省科技攻关专项基金资助项目(2001B30903)

摘　　要：在几何非线性分析的基础上考虑软粘土的非线性本构关系,采用张量指标记号推导出物质描述的一维非线性大变形固结的控制方程,采用有限差分方法对非线性控制方程进行数值求解,编制了计算程序。数值计算结果表明:在相同的非线性本构关系前提下,软粘土地基的非线性大变形固结沉降始终小于非线性小变形固结沉降;且随着荷载水平的增大,大变形固结和小变形固结的沉降量的差别越来越大,几何非线性对软粘土地基沉降影响是不可忽略的。The soft clay's nonlinear constitutive relation on the basis of geometrical nonlinear analysis is considered,nonlinear control equation of one_dimensional consolidation with large deformation is deduced using tensor index token method.The numerical solution is solved with finite difference method (FDM), and correspond computer program is worked out. From the numerical result of the program, consolidation settlement of nonlinear large deformation is always smaller than that of nonlinear small deformation in soft clay foundation.With increasing of load level the difference between the large and small deformation of consolidntion is more and more obvious,the influence to the total surface settlement of large deformation shouldn′t be ignored.

关 键 词：非线性 大变形 一维固结 软土地基 有限差分法 

分 类 号：TU43[建筑科学—岩土工程] O241.3[建筑科学—土工工程]