非固结锥形隔震支座振动台试验研究
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摘要
对一缩尺1∶4的采用非固结锥形隔震支座的钢框架结构模型进行了水平和竖向单向地震波输入下的振动台试验。通过输入不同类型的地震波,分析上部结构和锥形支座的地震反应。试验结果表明,在8度和9度罕遇地震作用下,上部结构的加速度峰值比输入加速度峰值增加10%~50%,和普通抗震结构相比具有明显的减震效果。由支座的滞回曲线可以看出,上下盖板会在地震作用下产生错动位移,同时挤压粘弹性体消耗地震能量。试验结果表明,非固结锥形隔震支座具有良好的减震性能,对低层建筑结构的减震具有明显的推广价值。
The shaking table tests are conducted with input of horizontal and vertical earthquake on a two-floor steel frame model with a scale down of 1:4 and unconsolidated conical bearing.Earthquake responses of top structure and conical bearing are analyzed by inputing earthquake wave with different magnitudes and types.Experimental results indicate that the peak acceleration of top structure has a increment by 10%～50% in the seismic of 8 and 9 intensity,but it has obviously isolated effect compared to normal anti-seismic structure.The hysteresis curves of the bearing show that the covers top and down dissipated earthquake energy by compressing the viscoelastic material when they formed stagger displacement.The results of the test indicate that the unconsolidated conical bearings have good damping effect and the promote value to multi-layer building for reducing vibration.
The shaking table tests are conducted with input of horizontal and vertical earthquake on a two-floor steel frame model with a scale down of 1:4 and unconsolidated conical bearing.Earthquake responses of top structure and conical bearing are analyzed by inputing earthquake wave with different magnitudes and types.Experimental results indicate that the peak acceleration of top structure has a increment by 10%～50% in the seismic of 8 and 9 intensity,but it has obviously isolated effect compared to normal anti-seismic structure.The hysteresis curves of the bearing show that the covers top and down dissipated earthquake energy by compressing the viscoelastic material when they formed stagger displacement.The results of the test indicate that the unconsolidated conical bearings have good damping effect and the promote value to multi-layer building for reducing vibration.
引文
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[2]刘文光.橡胶隔震支座力学性能和隔震结构地震反应分析研究[D].北京:北京工业大学,2003Liu Wen-guang.Mechanics Properties of Rubber Bearingsand Earthquake Response Analysis of Isolated Structure[D].Beijing:Beijing University of Technology,2003(inChinese)
[3]日本建筑协会.刘文光,译.隔震结构设计[M].北京:地震出版社,2006Liu Wen-guang,Translate.Recommendation for the Designof Base Isolated Buildings[M].Beijing:Seismic Press,2006(in Chinese)
[4]FENG D M,LIU W G,MASUDA K,et al.Shaking table testof various seismic isolation system[C]//Summaries ofTechnical Papers of Annual Meeting Architectural Institute ofJapan,Japan:Architectural Institute of Japan,2002
[5]Kelly J M.BASE Isolation in Japan,1988.Report No.UCB/EERC-88-20,EERC[R].Berkeley:University ofCalifornia,December,1988
[6]Tsopelas P,Constantinou M C,Dim Y S,et al.ExperimentalStudy of FPS System in Bridge Seismic Isolation[J].Earthquake Engineering and Structural Dynamics,1996,25:65~76
[7]孙凤利.锥形非固结支座的基本力学性能试验研究[D].广州:广州大学,2007Sun Feng-li.Basic mechanical performance test research onconical unconsolidated bearing[D].Guangzhou:GuangzhouUniversity,2007(in Chinese)
[8]付敏.锥形非固结隔震结构振动台试验研究[D].广州:广州大学,2008Fu Min.Shake table test research on conical unconsolidatedisolated structure[D].Guangzhou:Guangzhou University,2008(in Chinese)
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