近断层地震动作用下双层隔震体系的地震响应分析
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摘要
提出了采用基础隔震和层间隔震并用的双层隔震体系,输入近断层地震记录,考察了破裂向前方向性和滑冲效应脉冲对隔震结构的影响。研究表明,采用双层隔震体系可比单独采用基础隔震体系取得更好的减震效果,滑冲效应脉冲比破裂向前方向性脉冲对双层隔震结构更具有破坏性。中间隔震层的位移幅值通常要比基础隔震层的位移幅值大,应注意控制中间隔震层的最大位移不超过容许位移。在破裂向前方向性和滑冲效应脉冲地震作用下,中间隔震层宜分别设置在结构的中下部和结构的中部左右方可取得较好的减震效果。
The double isolation system composed of base isolation and story isolation is adopted under near-fault ground motions. In putting near-fault seismic records,the effects of rupture forward directivity and fling step pulse on isolated structure are studied. The research shows that the use of double isolation system can achieve better damping results than base isolation system. The fling-step pulse is more destructive to double isolation structure than the rupture forward directivity pulse. The displacement amplitude of intermediate isolation layer is usually larger than the displacement amplitude of base isolation layer,the maximum displacement of middle isolation layer should be controlled in the allowable displacement. In the rupture forward directivity and fling-step pulses earthquake,middle isolation layer should be respectively set in the lower part of the structure and the middle part of structure in order to obtain a better damping effect.
The double isolation system composed of base isolation and story isolation is adopted under near-fault ground motions. In putting near-fault seismic records,the effects of rupture forward directivity and fling step pulse on isolated structure are studied. The research shows that the use of double isolation system can achieve better damping results than base isolation system. The fling-step pulse is more destructive to double isolation structure than the rupture forward directivity pulse. The displacement amplitude of intermediate isolation layer is usually larger than the displacement amplitude of base isolation layer,the maximum displacement of middle isolation layer should be controlled in the allowable displacement. In the rupture forward directivity and fling-step pulses earthquake,middle isolation layer should be respectively set in the lower part of the structure and the middle part of structure in order to obtain a better damping effect.
引文
[1]Kalkan E,Kunnath S K.Effects of Fling Step and Forward Directivity on Seismic Response of Buildings[J].Earthquake Spectra,2006,22(2):367~390
[2]Hall J F,Heaton T H,Halling M W,Wald D J.Nearsource Ground Motion and Its Effects on Flexible Buildings[J].Earthquake Spectra,1995,11(4):569~605
[3]杨迪雄,赵岩.近断层地震动破裂向前方向性与滑冲效应对隔震建筑结构抗震性能的影响[J].地震学报,2010,32(5):579~587Yang Di-xiong,Zhao Yan.Effects of Rupture Forward Directivity and Fling Step of Near-fault Ground Motions on Seismic Performance of Base-isolated Building Structure[J].Acta Seismologica Sinica,2010,32(5):579~587(in Chinese)
[4]杨迪雄,赵岩,李刚.近断层地震动运动特征对长周期结构地震响应的影响分析[J].防灾减灾工程学报,2007,27(2):133~140Yang Di-xiong,Zhao Yan,Li Gang.Influence Analysis of Motion Characteristics of Near-fault Ground Motions on Seismic Responses of Long-period Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(2):133~140(in Chinese)
[5]王学庆,刘海卿.高层分段隔震结构的动力响应分析[J].地震工程与工程振动,2008,28(1):170~174Wang Xue-qing,Liu Hai-qing.Analysis of Dynamic Responses of the High-rise Structure Controlled by Segmented Isolation[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):170~174(in Chinese)
[6]高剑平,潘月月.基于能量的高层建筑分段隔震体系参数优化[J].地震工程与工程振动,2011,31(2):124~129Gao Jian-ping,Pan Yue-yue.Energy-based Parameters Optimization of Segmented Isolation System for High-rise Building[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(2):124~129(in Chinese)
[7]日本建筑学会.刘文光译.隔震结构设计[M].北京:地震出版社,2006Japan Architectural Institute.(Translation:Liu Wenguang).Recommendation for the Design of Base Isolated Buildings[M].Beijing:Seismological Press,2006(in Chinese)
[8]Wen Y K,Kang Y J.Minimum Building Life-cycle Cost Design Criteria,Ⅱ:Applications[J].Journal of Structural Engineering,2001,127(3):338~346
[2]Hall J F,Heaton T H,Halling M W,Wald D J.Nearsource Ground Motion and Its Effects on Flexible Buildings[J].Earthquake Spectra,1995,11(4):569~605
[3]杨迪雄,赵岩.近断层地震动破裂向前方向性与滑冲效应对隔震建筑结构抗震性能的影响[J].地震学报,2010,32(5):579~587Yang Di-xiong,Zhao Yan.Effects of Rupture Forward Directivity and Fling Step of Near-fault Ground Motions on Seismic Performance of Base-isolated Building Structure[J].Acta Seismologica Sinica,2010,32(5):579~587(in Chinese)
[4]杨迪雄,赵岩,李刚.近断层地震动运动特征对长周期结构地震响应的影响分析[J].防灾减灾工程学报,2007,27(2):133~140Yang Di-xiong,Zhao Yan,Li Gang.Influence Analysis of Motion Characteristics of Near-fault Ground Motions on Seismic Responses of Long-period Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(2):133~140(in Chinese)
[5]王学庆,刘海卿.高层分段隔震结构的动力响应分析[J].地震工程与工程振动,2008,28(1):170~174Wang Xue-qing,Liu Hai-qing.Analysis of Dynamic Responses of the High-rise Structure Controlled by Segmented Isolation[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):170~174(in Chinese)
[6]高剑平,潘月月.基于能量的高层建筑分段隔震体系参数优化[J].地震工程与工程振动,2011,31(2):124~129Gao Jian-ping,Pan Yue-yue.Energy-based Parameters Optimization of Segmented Isolation System for High-rise Building[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(2):124~129(in Chinese)
[7]日本建筑学会.刘文光译.隔震结构设计[M].北京:地震出版社,2006Japan Architectural Institute.(Translation:Liu Wenguang).Recommendation for the Design of Base Isolated Buildings[M].Beijing:Seismological Press,2006(in Chinese)
[8]Wen Y K,Kang Y J.Minimum Building Life-cycle Cost Design Criteria,Ⅱ:Applications[J].Journal of Structural Engineering,2001,127(3):338~346
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