基于隐式梯度模型的混凝土损伤的数值模拟  

Numerical simulation of concrete material based on gradient damage model

作　　者：张伟[1] 汪忠明[1] 杨伯源[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2008年第11期1852-1854,共3页Journal of Hefei University of Technology：Natural Science

摘　　要：分析了局部损伤模型在进行混凝土应变软化模拟时存在的问题:网络依赖性和零能量损耗问题;分别应用隐式梯度模型和局部模型对混凝土应变软化进行了模拟。计算表明该隐式梯度模型可较好避免有限元在应变软化模拟时的网络依赖性,预测出的荷载-位移响应与实际情况吻合较好。The two problems associated with strain softening of concrete material zero consumption of energy and mesh dependence are studied. The implicit gradient model and the partial model are applied respectively to simulation of the strain softening. The results of an example indicate that the gradient model with the B-spline weight function can overcome mesh dependence when the strain-softening phenomenon of concrete material is simulated.

关 键 词：应变软化 网络依赖性 隐式梯度模型 

分 类 号：O346.5[理学—固体力学]