非饱和土弹塑性模型在土坝蓄水变形中的应用  

Application of Elastoplastic Model of Unsaturated Soil to Impoundment Deformation of Earth Dams

作　　者：郭利娜[1] 

机构地区：[1]水利部发展研究中心,北京100038

出　　处：《三峡大学学报（自然科学版）》2013年第3期7-11,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(51209076);水利部公益性行业科研专项经费项目(201301058)

摘　　要：对非饱和土弹塑性模型(BBM)进行了总结,推导出弹塑性矩阵,采用Galerkin加权余量法以及向后欧拉法对控制方程进行空间域和时间域上的离散,编制了用于分析非饱和土水-应力耦合问题的非线性有限元程序.采用该本构模型,对一均质堤坝在蓄水之后的流固耦合问题进行了有限元分析,结果表明堤坝内的渗流和变形的分布符合规律.The elastoplastic model of unsaturated soil is summarized and an elastoplastic matrix is derived. Meanwhile, the Galerkin weighted residual approach and backward Euler method are used to discretize the control equations in the spatial and time domains. A nonlinear finite element program is further compiled to analyze unsaturated soil water-stress coupling issues. The constitutive model is used to conduct finite element analysis of the fluid-structure interaction of a homogeneous dam after impoundment. The results show that the dam seepage and deformation distributions accord with the law.

关 键 词：非饱和土 弹塑性分析 水一应力耦合 有限元 

分 类 号：TV641.2[水利工程—水利水电工程]