基础隔震结构地震作用的实用分析
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摘要
隔震结构通过延长结构自振周期来减轻结构水平地震作用。由于基础隔震结构阻尼主要分布在隔震层上,振动时其阻尼力仅影响隔震层本身及其下部结构的内力,对隔震层上部内力无影响,而自振周期及阻尼比与相应隔震结构相同的抗震结构其阻尼分布在结构整体,地震作用包含结构振动惯性力及结构自身阻尼力两部分。文中根据基础隔震结构在地震作用下的振动方程,推导出基础隔震结构隔震层上部、下部以及隔震层本身地震作用的计算公式,表明采用抗震结构的地震作用计算公式计算隔震结构是欠妥的。
引文
[1]建筑抗震设计规范[S].(2008年版)GB50011-2001.北京:中国建筑工业出版社,2008.9(Code for seismic designof buildings[S].(2008edition).GB 50011-2001(in Chinese))
[2]祁皑、林于东.改进的基础隔震结构地震作用简化计算方法[J].地震工程与工程震动,2006.2(1):152-156(QiAj,Lin Yudong.An improved simplified method for seismic action design of base-isolation buildings[J].Earth-quake Engineering and Engineering Vibration 2006.2(1):152-156(in Chinese))
[3]Vasant A.Matsagar,R.S.Jangid.Influence of Isolator Characteristics on the Response ofBase-isolated Structures[J].Engineering Structures 2004(26):1735-1749
[4]Yozo Shinozaki,Osamu Hosozawa,Tsutomu Komuro.Structural Design of Base-isolation System for Tall Build-ing in Japan[J].CTBUH 2004.10(10～13):195-200
[5]Jenn-Shin Hwang,Ting-Yu Hsu.Experimental Study of Isolated Building Under Triaxial Ground Excitations[J].Journal of Structural Engineering 2000.8:879-886
[2]祁皑、林于东.改进的基础隔震结构地震作用简化计算方法[J].地震工程与工程震动,2006.2(1):152-156(QiAj,Lin Yudong.An improved simplified method for seismic action design of base-isolation buildings[J].Earth-quake Engineering and Engineering Vibration 2006.2(1):152-156(in Chinese))
[3]Vasant A.Matsagar,R.S.Jangid.Influence of Isolator Characteristics on the Response ofBase-isolated Structures[J].Engineering Structures 2004(26):1735-1749
[4]Yozo Shinozaki,Osamu Hosozawa,Tsutomu Komuro.Structural Design of Base-isolation System for Tall Build-ing in Japan[J].CTBUH 2004.10(10～13):195-200
[5]Jenn-Shin Hwang,Ting-Yu Hsu.Experimental Study of Isolated Building Under Triaxial Ground Excitations[J].Journal of Structural Engineering 2000.8:879-886
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