地震作用下大型渡槽结构动态应力计算方法研究  

Calculation method for dynamic stress of large-scale aqueduct under the action of earthquake

作　　者：徐建国[1] 陈淮[2] 王博[2] 

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024 [2]郑州大学土木工程学院,河南郑州450002

出　　处：《水利学报》2002年第7期79-82,共4页Journal of Hydraulic Engineering

基　　金：河南省杰出青年科学基金资助项目 (豫科计 1998 2 8) ;河南省自然科学基金资助项目 (0 0 40 40 10 0 )

摘　　要：作者首先采用常规有限元法求出渡槽结构需要计算部位周围处的有限元结点位移和加速度 ,然后利用最小余能法对南水北调水利工程中某大型渡槽槽身结构的动态应力进行了计算。结果表明 :采用最小余能法计算悬臂梁结构在地震动作用下的动态应力结果与作者的方法较接近 ,而常规有限元的计算结果较理论解有较大误差 ;对单跨渡槽槽身结构 ,常规有限元法的动态应力计算结果比理论解出现较大的偏差 。The minimum remainder\|energy method is applied to calculate the dynamic stress of a large\|scale aqueduct.In the process of calculation the FEM is used at first to calculate the surrounding node's velocity and acceleration of the location to be study and then the dynamic stress is calculated using minimum remainder\|energy method.In comparison with the theoretical solution,the calcuation result of the proposed method for cantilever beam under tht action of earthquake is better than that of the traditional FEM.Significant deviation is found between the calculated results of single span aqueduct obtained from the proposed method and FEM.

关 键 词：地震作用 渡槽 结构 动态应力 有限元 

分 类 号：TV672.3[水利工程—水利水电工程]