Stability analysis of a concrete gravity dam and its foundation  

大坝与坝基稳定性分析研究(英文)

作　　者：Itoya Emioshor 赵引[1] Martins Y.Otache 

机构地区：[1]河海大学土木工程学院,南京210098 [2]河海大学水资源环境学院,南京210098

出　　处：《Journal of Southeast University(English Edition)》2004年第4期508-512,共5页东南大学学报（英文版）

摘　　要：The stability of dams and their foundations is an important problem to which dam engineers have paid close attention over the years. This paper presented two methods to analyze the stability of a gravity dam and its foundation. The direct analysis method was based on a rigid limit equilibrium method which regarded both dam and the rock foundation as undeformable rigid bodies. In this method, the safety factor of potential sliding surfaces was computed directly. The second method, the indirect analysis method, was based on elasto-plastic theory and employs nonlinear finite element method (FEM) in the analysis of stresses and deformation in the dam and its foundation. The determination of the safety degree of the structure was based on the convergence and abrupt the change criterion. The results obtained showed that structures' constituent material behavior played an active role in the failure of engineered structures in addition to the imposed load.大坝与坝基的稳定一直是工程师密切关注的一个安全问题。论文提出2种分析重力坝和坝基稳定的方法:一种是基于刚体极限平衡原理的直接分析方法,它将坝体和岩基作为不变形的刚体,利用该方法可直接计算出可能滑动面的安全因数;另一种是基于弹塑性理论的间接分析方法,它采用非线性有限元方法分析大坝和坝基的应力和变形.根据收敛和突变准则来确定稳定安全度.结果表明:工程建筑物的破坏不仅仅是由于施加荷载的原因,同时也与组成材料的性质有关.

关 键 词：Concrete dams Elastoplasticity Finite element method Nonlinear equations Safety factor Sensitivity analysis Shear strength 

分 类 号：TV642[水利工程—水利水电工程]