【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 ,特解边界元法是计算非均质裂缝动态断裂的有效方法更多还原

【Abstract】 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.更多还原