弹性滑移支座力学性能的试验研究
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摘要
介绍了弹性滑移支座的原理、构造和特点;通过对其在不同工况下的性能试验,研究了竖向荷载、位移幅值以及加载频率对弹性滑移支座力学性能的影响,并给出了试验值与理论计算值之间的对比。研究结果表明:弹性滑移支座具有良好的工作性能,滞回曲线饱满,耗能能力强;竖向荷载和加载频率对弹性滑移支座的力学性能有一定的影响,而位移幅值对其影响较小;弹性滑移支座的恢复力模型,可以用考虑速度的指数摩擦力模型来描述,并且模拟得较为准确。
The principle of an elastic sliding bearing and its structure as well as characteristics are introduced in this paper.By testing its performance under different conditions,the influence of vertical load,displacement amplitude,and loading frequency on the bearing performance were analyzed.Experimental data and calculated theoretical ones are presented for comparison.The results show that the elastic sliding bearing has excellent working performance with full looping curves and high capacity for energy dissipation.The vertical load and the loading frequency have certain effect on the mechanical performance,while the displacement amplitude has little effect.A restoring force model of the bearing can be described with the exponential friction model considering velocity with high accuracy.
The principle of an elastic sliding bearing and its structure as well as characteristics are introduced in this paper.By testing its performance under different conditions,the influence of vertical load,displacement amplitude,and loading frequency on the bearing performance were analyzed.Experimental data and calculated theoretical ones are presented for comparison.The results show that the elastic sliding bearing has excellent working performance with full looping curves and high capacity for energy dissipation.The vertical load and the loading frequency have certain effect on the mechanical performance,while the displacement amplitude has little effect.A restoring force model of the bearing can be described with the exponential friction model considering velocity with high accuracy.
引文
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[7]Mokha A S,Constantinou M C.Verification of fric-tion model of Teflon bearings under triaxial load[J].Journal of Structural Engineering,1993,119(1):240-261.
[8]Hinrchs N,Obstreich M,Popp K,et al.On the model-ing of friction of oscillators[J].Journal of Sound andVibration,1998,216(3):435-459.
[9]樊剑,唐家祥.基于指数摩擦力模型滑移隔震结构的动力特性[J].振动与冲击,2000,19(3):30-33.Fan J,Tang J X.Dynamic characteristics of a slidingstructure based on index friction model[J].Journal ofVibration and Shock,2000,19(3):30-33.
[10]Mostaghel N,Davis T.Representations of coulombfriction for dynamic analysis[J].Earthquake Engi-neering and Structural Dynamics,1997,(5):541-548.
[2]程华群,刘伟庆,王曙光.组合弹性滑移支座在高层隔震建筑中的应用研究[J].工程抗震与加固改造,2007,29(3):48-53.Cheng H Q,Liu W Q,Wang S G.Application studyon elastic sliding bearings in isolated high-rise building[J].Earthquake Resistant Engineering and Retrofit-ting,2007,29(3):48-53.
[3]Agarwal V K,Niedzwecki J M,van de Lindt J W.Earthquake induced pounding in friction varying baseisolated buildings[J].Journal of Structural Engineer-ing,2007,3(2):2825-2832.
[4]樊剑,唐家祥.滑移隔震结构的动力特性及地震反应[J].土木工程学报,2000,33(4):11-16.Fan J,Tang J X.Dynamic characteristics and seismicresponse of a sliding structure[J].China Civil Engi-neering Journal,2000,33(4):11-16.
[5]Madden G J,Symans M D,Wongprasert N.Experi-mental verification of seismic response of buildingframe with adaptive sliding base-isolation system[J].Journal of Structural Engineering,2002,128(8):1037-1045.
[6]毛利军,李爱群.基础滑移隔震体系的地震反应谱[J].土木工程学报,2004,37(2):58-66.Mao L J,Li A Q.Seismic response spectrum of asliding structure[J].China Civil Engineering Journal,2004,37(2):58-66.
[7]Mokha A S,Constantinou M C.Verification of fric-tion model of Teflon bearings under triaxial load[J].Journal of Structural Engineering,1993,119(1):240-261.
[8]Hinrchs N,Obstreich M,Popp K,et al.On the model-ing of friction of oscillators[J].Journal of Sound andVibration,1998,216(3):435-459.
[9]樊剑,唐家祥.基于指数摩擦力模型滑移隔震结构的动力特性[J].振动与冲击,2000,19(3):30-33.Fan J,Tang J X.Dynamic characteristics of a slidingstructure based on index friction model[J].Journal ofVibration and Shock,2000,19(3):30-33.
[10]Mostaghel N,Davis T.Representations of coulombfriction for dynamic analysis[J].Earthquake Engi-neering and Structural Dynamics,1997,(5):541-548.
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