高层隔震结构多阶振型减震机理与倾覆问题研究
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摘要
如何获得良好的减震效果及抵抗倾覆是隔震技术应用到高层建筑结构中必须解决的两个主要问题。通过对高层抗震与隔震结构的地震时程对比分析,验证了高层隔震建筑存在多阶振型共同减震的现象。根据多振型高宽比显式计算公式计算可知,高阶振型对结构高宽比限值的计算有较大影响,是研究高层隔震结构抗倾覆问题不可忽略的影响因素。
How to obtain good damping effect and prevent overturn are two key problems which have to be solved before applying isolation technology to high-rise buildings.By using comparative analysis of the seismic time history of aseismic and isolated high-rise buildings,the integrated multi-modal damping phenomenon of high-rise buildings is validated.According to the explicit formulas of multi-modes height-width ratio,it is found that high modes have big influence on height-width ratio calculation,which should not be neglected in the anti-overturning design of high-rise isolated buildings.
How to obtain good damping effect and prevent overturn are two key problems which have to be solved before applying isolation technology to high-rise buildings.By using comparative analysis of the seismic time history of aseismic and isolated high-rise buildings,the integrated multi-modal damping phenomenon of high-rise buildings is validated.According to the explicit formulas of multi-modes height-width ratio,it is found that high modes have big influence on height-width ratio calculation,which should not be neglected in the anti-overturning design of high-rise isolated buildings.
引文
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[3]中华人民共和国国家标准GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2008.National Standards of the People's Republic of China(GB50011-2001)Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press.2008.
[4]Michael C,James M Kelly.Displacment control and uplift restraint for base-isolated structures[J].Journal of Structural Engineering,1990,116:24611—24625.
[5]Arturo Tena C,Chistian Zambrana R.Dynamic torsional amplification of base-isolated structures with an eccentric isolaton system[J].Engineering Structures,2006,28:72—83.
[6]Pourzeynali S,Zarif M.Multi-objective optimization of seismically isolated high-rise building structures using genetic algorithms[J].Journal of Sound and Vibration,2008,311:1 141—1 160.
[7]Shakib H,Fuladgar A.Effect of vertical component of earthquake on the response of pure-friction base-isolation asymmetric buildings[J].Engineering Structures,2003,25:1 841—1 850.
[8]王铁英,王焕定,刘文光,等.大高宽比橡胶垫隔震结构振动台实验研究(2)[J].哈尔滨工业大学学报,2007,39(2):196—201.Wang Tieying,Wang Huanding,LIU Weiguang,et al.Shaking table test study on large height-width ratio rubber bearings isolation structure(2)[J].Journal of Harbin Institute of Technology,2007,39(2):196—201.
[9]何文福,刘文光,张颖,等.高层隔震结构地震反应振动台试验分析[J].振动与冲击击,2008,27(8):97—101.He Wenfu,Liu Wenguang,Zhang Ying,et al.Exper-imental study on high rise isolated structure[J].Journal of Vibration and Shock,2008,27(8):97—101.
[10]丁琳,付伟庆,吕孔才,等.振动台模拟高层隔震结构多维地震反应的实验[J].沈阳建筑大学学报,2007,23(3):367—371.Ding Lin,Fu Weiqing,Lv Kongcai,et al.Experimental research on shaking table for simulating multidimensional earthquake responses of high-rise isolated structure[J].Journal of Shenyang Jianzhu University(Natural Science),2007,23(3):367—371.
[11]程华群,刘伟庆,王曙光,等.高层隔震建筑设计中隔震支座受拉问题分析[J].地震工程与工程振动,2007,27(4):161—166.Cheng Huaqun,Liu Weiqing,Wang Shuguang.Analysis of the tension of rubber bearings in the design of isolated high-rise buildings[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(4):161—166.
[12]徐翔.高层建筑结构隔震与抗风研究分析[D].福州:福州大学,2010.Xu Xiang.The analysis of isolation and wind resistance on high-rise buildings[D].Fuzho:Fuzhou University,2010.
[13]祁皑,范宏伟.基础隔震结构高宽比限值研究[J].建筑结构学报,2004,25(6):52—58.Qi Ai,Fan Hongwei.Research on the height-width ratio of base isolated structure[J].Journal of Building Structures,2004,25(6):52—58.
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