土石坝地震永久变形分析

永久变形分析方法主要包括两类，一类是滑体变形分析，一类是整体变形分析，而在后一类方法中，具有典型代表性的是Ｓｅｒｆｆ的等价结点力法和Ｔａｎｉｇｕｃｈｉ的等价惯力法，本文吸收这两种方法的优点，建立了一种土石坝地震永久变形计算方法，编制了相应的有限元计算程序，用于瀑布沟土石永久形数值计算，结果符合一般观测规律，验证了本文方法的合理性。

Earthquake-Induced Permanent Deformation of Earth-Rock Dams

Earthquake-induced permanent deformation is a criterion for evaluating antiearthquake properties of earth-rock dams. There are two analytical ways, one is sliding block deformation analysis, another is continuous deformation analysis, The serff's equivalent nodal force method and the Tanigchi's equivalent inertial force method boing two representative ones in the latter. On the basis of these two methods, a new method is presented in the paper-for calculating earthquake induced permanent deformation of earth rockdams, and a finite element method program is compiled, By using of the program, the two dimensional earthquake-induced permanent deformation analysis for Pu Bo Go earthrock dam is made. It is concluded that the numerical values and distribution law of perment deformation are in agreement with observations.