考虑碰撞效应的大型渡槽结构地震响应分析  

Analysis of seismic response including pounding effect for a Large-Scale aqueduct

作　　者：王博[1] 黄亮[2] 徐建国[1] 孙丽萍[1] 侯玉洁[1] 

机构地区：[1]郑州大学水利与环境学院,郑州450002 [2]郑州大学土木工程学院,郑州450002

出　　处：《振动与冲击》2011年第4期265-270,共6页Journal of Vibration and Shock

基　　金：河南省科技厅基础与前沿技术研究项目(082300440070)

摘　　要：针对渡槽在地震作用下伸缩缝处的碰撞现象,建立考虑碰撞效应的渡槽动力分析模型,用非线性地震反应时程分析方法,研究了纵向地震作用下的碰撞效应对于渡槽地震响应的影响,分析比较了单边碰撞与双边碰撞对渡槽地震响应的影响差异,结果表明碰撞对渡槽结构的地震响应状态有所改变,渡槽槽身间的相对位移受碰撞的影响将减小,但碰撞产生的巨大撞击力对渡槽结构有较大危害,研究结果对大型渡槽结构的抗震设计具有一定的参考价值。Aiming at pounding phenomenon at expansion joints of a large-scale aqueduct during earthquakes,a dynamic analysis model considering effects of collision was presented.With time history analysis method of nonlinear seismic responses,pounding effects of adjacent girders at expansion joints on seismic responses of a large-scale aqueduct were studied,and influences of two-sided and one-sided pounding on structural responses were also investigated.The results showed that the pounding changes the response states of the aqueduct to a certain extent,the relative displacements between the girders decrease,but the huge pounding force is harmful to the safe operation of the aqueduct.The results could be a reference for seismic design of large-scale aqueducts.

关 键 词：地震响应 渡槽 单边碰撞 双边碰撞 

分 类 号：TU352[建筑科学—结构工程]