人民长江Issue(21)：92-96,5.
基于塑性损伤模型的重力坝非线性地震响应分析
Analysis of nonlinear earthquake response of concrete gravity dam based on plastic - damage model
摘要
Abstract
In this paper,based on the plastic - danage nodel proposed by Lee and Fenves and related algorithns,we develop the progran to sinulate the danage process of concrete structure subjected to cyclic earthquake excitation. To sinulate the phe-nonenon of stiffness degradation and recovery during a large crack opening and closing process,a critical tensile plastic - danage variable is defined to correct stiffness degradation variable and prevent excessive increase in plastic strain. A visco - plastic nodel is used to regularize this plastic danage nodel to reduce the dependence of conputational result on nesh size. According to the response of concrete specinen under different loading conditions and the danage evolution process of Koyna dan subjected to earthquake loading,the rationality and effectiveness of the presented nodel and the related progran is proved.关键词
混凝土/塑性损伤模型/黏塑性/大开裂/重力坝Key words
concrete/plastic - danage nodel/visco - plastic/large cracking/gravity dan分类
建筑与水利引用本文复制引用
吴凡,胡志强..基于塑性损伤模型的重力坝非线性地震响应分析[J].人民长江,2014,(21):92-96,5.基金项目
国家自然科学基金重大研究计划集成项目（91215301）；国家自然科学基金委创新研究群体基金 （）
