具有NES的复合摩擦摆隔震性能有限元分析
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摘要
为探讨具有NES的复合摩擦摆隔震性能,采用ABAQUS软件对一幢三层框架结构进行有限元模拟分析,选取EL-Centro波、Accel人工波、Taft波,计算结构在不同震级、不同加速度峰值地震作用下的响应,并对隔震前后结构的动力反应进行对比.分析结果表明:具有NES的复合摩擦摆隔震支座可以有效地减小结构在地震作用下的加速度响应,并使结构产生整体平移,减小了结构的层间位移角,同时增大了结构自振周期,远离了一般场地的卓越周期,结构可以快速有效地吸收消耗地震能,将地震能更多地转化掉,从而达到隔震的效果.
In order to investigate the isolation performance of complex FPS based on NES,this paper carried out a finite element analysis on a three-tier framework with ABAQUS software,and the response of structure in different seismic magnitude and peak acceleration was calculated under EL-Centro wave,Accel artificial wave and Taft wave,and the dynamic response of the structure were compared before and after isolation.The results show that isolators of complex FPS based on NES can reduce acceleration response of the structure under earthquake effectively,make the structure generated translation,reduce the structural layer between the displacement angle,increase the structural vibration period as well which is away from the predominant period of the general venue,absorb and consume the seismic energy quickly and effectively,then transform the seismic energy,so as to achieve the effect of isolation.
In order to investigate the isolation performance of complex FPS based on NES,this paper carried out a finite element analysis on a three-tier framework with ABAQUS software,and the response of structure in different seismic magnitude and peak acceleration was calculated under EL-Centro wave,Accel artificial wave and Taft wave,and the dynamic response of the structure were compared before and after isolation.The results show that isolators of complex FPS based on NES can reduce acceleration response of the structure under earthquake effectively,make the structure generated translation,reduce the structural layer between the displacement angle,increase the structural vibration period as well which is away from the predominant period of the general venue,absorb and consume the seismic energy quickly and effectively,then transform the seismic energy,so as to achieve the effect of isolation.
引文
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[9]徐羿.基于非线性能量吸振器的结构一维振动抑制分析[D].杭州:浙江大学研究生院,2013.Xu Yi.Analysis on suppression of structural one-dimensional vibration via nonlinear energy sink absorber[D].Hangzhou:Graduate School of Zhejiang Unicersity,2013.
[10]杨海旭,王维韬.强震作用下框架结构节点抗震性能有限元分析[J].辽宁工程技术大学学报:自然科学版,2014,33(3):330-335.Yang Haixu,Wang Weitao.Finite element analysis of joints seismic performance of frame structure under strong earthquake[J].Journal of Liaoning Technical University Natural Science,2014,33(3):330-335
[2]吕军水.国内外隔震技术研究进展及其工程应用[J].山西建筑,2012,38(23):21-22.Lv Junshui.Isolation research development and engineering application technology abroad[J].Shanxi architecture2012,38(23):21-22.
[3]Zayas V,Low S.The FPS earthquake resisting system[R].Technical Report UCB/EERC-87/01,University of California at Berkeley,1987.
[4]李大望,庄鹏,周锡元.结构内设备的摩擦摆隔震响应分析[J].世界地震工程,2004,20(4):90-93.Li Dawang,Zhuang Peng,Zhou Xiyuan.Analysis on seismic response of FPS-isolated equipment in buildings[J].World Earthquake Engineering,2004,20(4):90-93.,
[5]Starosvetsky Y,Gendelman O.Vibration absorption in systems with a nonlinear energy sink:Nonlinear damping[J].Journal of Sound and vibration,2009,324(3/4/5):916-939.
[6]Gendelman O,Bar T.Bifurcations of self-excitation regimes in a Van der Pol oscillator with a nonlinear energy sink[J].Physica D:Nonlinear phenomena,2010,239(3/4):220-229.
[7]Kopidakis G P.Targeted energy transfer through discrete breathers in nonlinear systemd[J].Physical Review Letters,2001,87(16):165501.
[8]刘海卿,陈振西,袁景.强震作用下高层框架结构倒塌破坏三维仿真[J].辽宁工程技术大学学报:自然科学版,2010,29(6):1 074-1 077.Liu Haiqing,Chen Zhenxi,Yuan Jing.3-D simulation on collapse of high-rise structures under strong earthquake[J].Journal of Liaoning Technical University:Natural Science,2010,29(6):1 074-1 077.
[9]徐羿.基于非线性能量吸振器的结构一维振动抑制分析[D].杭州:浙江大学研究生院,2013.Xu Yi.Analysis on suppression of structural one-dimensional vibration via nonlinear energy sink absorber[D].Hangzhou:Graduate School of Zhejiang Unicersity,2013.
[10]杨海旭,王维韬.强震作用下框架结构节点抗震性能有限元分析[J].辽宁工程技术大学学报:自然科学版,2014,33(3):330-335.Yang Haixu,Wang Weitao.Finite element analysis of joints seismic performance of frame structure under strong earthquake[J].Journal of Liaoning Technical University Natural Science,2014,33(3):330-335
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