【摘要】 利用特解边界元法分析了重力坝-地基-库水体系的动态断裂问题,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。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。特解边界元法是计算重力坝-地基-库水体系动断裂分析的有效方法。更多还原

【Abstract】 The dynamic fracture problem of the water, foundation and gravity dam system is successfully solved by Particular Solution Boundary Element Method ( PSBEM) . The changing law of dynamic stress intensity factors for interfacial cracks in the vicinity of gravity dam heel is discussed under earthquake effect. Stress intensity factors KI, KII and K0 change in reverse proportion to the ratio of elastic module while in direct proportion to the crack length. Earthquake hydrodynamic pressure has a fairly strong influence on the cracks. Examples indicate that PSBEM is a valid method,worth recommending to the engineering field.更多还原