【摘要】 针对岩石混凝土类材料 ,提出了损伤局部化分叉模型。根据材料发生损伤局部化分叉的充要条件 ,对平面应变和平面应力情况下单轴拉伸、纯剪以及单轴压缩情况下的局部化结果进行了分叉分析 ,并通过数值模拟分析比较 ,说明文中模型是可行的 ,且已应用于拱坝坝踵开裂分析中。更多还原

【Abstract】 The paper presents a damage localization bifurcation model for rock concrete like materials. The necessary and sufficient conditions for the occurrence of damage localization were discussed and the critical hardening modulus and localization orientation were presented. Several simple cases were discussed and the results were verified by numerical simulations of FEM. The model is applied to the cracking simulation of the heel of an arch dam during the course of impounding.更多还原