水力发电学报2011，Vol.30Issue(6)：52-56,5.
混凝土动力塑性损伤分析中的单元尺寸效应探讨
Study of element-size effect on dynamic plastic-damage analysis of concrete
摘要
Abstract
This paper discusses element-size effect on nonlinear analysis of concrete.Crack strain is considered as a function of crack displacement and element length at the integration point,and a model of fracture energy and blunt crack band is developed.This model is used to improve the plastic-damage model in ensuring the uniqueness of fracture energy and effectively eliminating the element-size effect on plastic damage analysis of concrete.Application of these models to a case study of koyna gravity dam shows that the proposed method is effective in simulation of concrete uniaxial tension and analysis of seismic damage.关键词
塑性力学/混凝土塑性损伤/单元尺寸效应/断裂能/钝裂缝带模型Key words
theory of plasticity/concrete plastic-damage/element-size effect/fracture energy/blunt crack band model分类
建筑与水利引用本文复制引用
郭胜山,陈厚群,李德玉,马怀发..混凝土动力塑性损伤分析中的单元尺寸效应探讨[J].水力发电学报,2011,30(6):52-56,5.基金项目
水利部公益性行业科研专项 （）
中国水科院专项极限地震下混凝土坝抗震安全研究 （）
中国水科院博士创新基金 （）
国家自然科学基金 （）
