拱坝气幕隔震的三维动力有限元技术研究  

Study on Three Dimensional Dynamic FEM of Air Cushion Isolation of Arch Dam

作　　者：唐天国[1,2] 刘浩吾[3] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072 [2]四川大学建筑与环境学院,四川成都610065 [3]四川大学水利水电学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2009年第4期14-18,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金重大研究计划资助项目(90715026)

摘　　要：地震发生时坝体和库水之间相互耦合,产生动水压力,而动水压力又反作用于坝体,提出采用气幕隔震技术消减动水压力,以提高拱坝抗震性能。用流固耦合理论,建立了坝体-气幕-库水隔震的三维有限元分析模型,研究了气幕隔震的减震机理和隔震效果。对拱坝进行三维动力有限元数值仿真分析,结果表明,气幕隔震对动水压力反应、加速度反应均有显著影响,尤其是动水压力,气幕可使动水压力减少约65%效果。另外,对坝面动水压力典型分布进行了分析。Hydrodynamic pressure will be produced from interaction and intercoupling between dam and reservoir during earthquake.Arch dam will subjected to impact action from hydrodynamic pressure.Air isolation technique has been applied to decrease hydrodynamic pressure and to improve shock-resistant capability of arch dam.Based on the theory of fluid-solid interaction,tridimensional FEM model of dam-air-water is introduced.Research of seismic isolation mechanism on air cushion has been formulated.Tridimensional dyna...

关 键 词：气幕隔震 动力有限元 动水压力 拱坝 

分 类 号：TU352.12[建筑科学—结构工程]