地震作用下大型渡槽结构纵向碰撞非线性分析  

Longitudinal nonlinear pounding study of large-scale aqueduct under earthquake

作　　者：徐建国[1] 王博[1] 陈淮[1] 刘翔[1] 

机构地区：[1]郑州大学水利与环境工程学院,河南郑州450002

出　　处：《地震工程与工程振动》2010年第5期126-133,共8页Earthquake Engineering and Engineering Dynamics

基　　金：河南省自然科学基金资助项目(82300440070);河南省科技攻关资助项目(0624450009)

摘　　要：本文依据建立的渡槽薄壁结构动力分析模型,利用非线性接触单元Kelvin碰撞模型,开展了渡槽结构纵向碰撞非线性地震响应分析。选择适合不同场地条件和不同峰值调幅的地震动输入,计算分析了南水北调某渡槽结构纵向碰撞地震响应。分析计算结果说明,伸缩缝间距大小对跨间碰撞效应影响很大;同时结构碰撞响应对输入地震动具有较强的频谱敏感性;经比较渡槽结构考虑碰撞与不考虑碰撞效应的地震反应,结果显示两者存在明显差异,说明开展大型渡槽结构非线性碰撞地震响应分析是很有必要的。In this paper,according to the dynamic model of thin-wall aqueduct,the longitudinal nonlinear pounding analysis under earthquake is developed with Kelvin pounding model.The seismic ground motions with various site conditions and various peak accelerations are selected and with these seismic ground motions,the longitudinal seismic pounding response of the aqueduct for the project of diliverting water from south to north is studied.The calculation result shows that the clearance of expansion joint affects the pounding response a lot.The pounding response is sensitive to the frequency spectrum of input ground motions.Comparing the pounding responses and non pounding responses under earthquake,the results are different obviously.It is necessary to study the nonlinear seismic pounding responses of large-scale aqueduct.

关 键 词：渡槽 非线性碰撞 KELVIN模型 时程分析 地震响应 

分 类 号：TV312[水利工程—水工结构工程] P315.962[天文地球—地震学]