在动荷载作用下的结构断裂分析  

Fracture analysis of structure subjected to dynamic loading

作　　者：陆瑞明[1] 钱济成[1] 

机构地区：[1]扬州工学院,河海大学

出　　处：《水利学报》1994年第4期81-86,共6页Journal of Hydraulic Engineering

摘　　要：本文提出了结构在动荷载作用下，求解平面复合型裂纹的动态应力强度因子ＫⅠ和ＫⅡ的新方法──振型Ｊｋｊ积分法．此法能够求解复杂受载情况和高阶振型的影响，计算结果也有足够的精度．文中应用这一方法分析计算了新丰江大坝的地震动力响应，计算结果与新丰江大坝实际的开裂情况相符．This paper suggests a new method─vibration model Jkj integral method to determine the dynamic stress intensity factors of plane mixed mode cracks in structures subjected to dynamic loading. This method not only can aolve the complex problems such as loading on the crack surface or structure under the influence of high order vibration mode, but also reduce the amount of computation. The computational results show that the reasonable accuracy can be obtained. Then,the method is applied to the Xinfengjiang dam for analysis of its dynamic fracture under seismic loading, and the results agree well with the actual situation.

关 键 词：动载荷 大坝 结构断裂 

分 类 号：TV313[水利工程—水工结构工程]