重力坝坝踵界面裂缝的地震断裂分析  

The Dynamic Fracture Analysis of Interfacial Crack in the Vicinity of Gravity Dam Heel

作　　者：胡良明[1] 李宗坤[1] 周鸿钧[1] 

机构地区：[1]郑州大学环境与水利学院,河南郑州450002

出　　处：《郑州大学学报（工学版）》2002年第3期101-103,共3页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目 (18972 0 6 1)

摘　　要：针对有限元方法计算异弹模界面裂缝程序繁琐的问题 ,利用特解边界元法 ,对重力坝坝踵区界面裂缝在地震作用下的应力强度因子变化规律进行了探讨 ,得出了应力强度因子KⅠ ,KⅡ ,K0 随弹模比的增加而减少 ,随裂缝长度的增加而增加 ,地震动水压力对重力坝裂缝影响较大 .算例表明 。It is more complicated to use Finite Element Method to calculate bimaterial interfacial crack Under earthquake act, the changing law of dynamic stress intensity factors for interfacial crack in the vicinity of gravity dam heel is discussed by Particular Solution Boundary Element Method (PSBEM) Stress intensity factors K Ⅰ?K Ⅱ and K 0 decrease as the ratio of elastic module increases, whereas they increase as the crack increases Earthquake hydrodynamic pressure has great influence on the heel crack of gravity dam Example indicates that PSBEM is a valid method, which is worth recommending for engineering use.

关 键 词：重力坝 坝踵 界面裂缝 地震断裂分析 粘弹性 非均质裂缝 断裂分析 应力强度因子 

分 类 号：TV64[水利工程—水利水电工程]