考虑土-结构相互作用的地震反应谱
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摘要
利用集总参数法建立了土-结构相互作用模型,分析推导了该模型下的地震反应谱公式,通过实例计算,得出了相互作用体系在不同频率地震波作用下的反应谱曲线.研究结果表明:对于具有浅埋刚性基础的结构体系,相互作用后的地震响应值与现有反应谱理论计算值有明显的差异,结构地震反应在大部分结构周期范围内得到折减,而在特定结构周期范围内得到明显增强;同时,相互作用体系可吸收特定频率的地震波,但现有的反应谱理论没有体现这一有利作用.
The soil-structure interaction model is established by using lumped parameter method and the earthquake response spectrum equation based on this model is deduced.Through the calculation of actual example,some response spectrum curves of interaction system under the action of earthquake wave of various frequencies are given.The results show that even during the same earthquake,for the structures with shallow buried rigid foundations,the response spectrums are obviously different from the present ones.Seismic response is discounted for many structures of various periods while it is enhanced for structures of some given periods.The results also show that interaction system can absorb the earthquake waves of specific frequency,which is not reflected in the present response spectrum theory.
The soil-structure interaction model is established by using lumped parameter method and the earthquake response spectrum equation based on this model is deduced.Through the calculation of actual example,some response spectrum curves of interaction system under the action of earthquake wave of various frequencies are given.The results show that even during the same earthquake,for the structures with shallow buried rigid foundations,the response spectrums are obviously different from the present ones.Seismic response is discounted for many structures of various periods while it is enhanced for structures of some given periods.The results also show that interaction system can absorb the earthquake waves of specific frequency,which is not reflected in the present response spectrum theory.
引文
[1]RODRIGUEZ M E,MONTES R.Seismic response and damage analysis of buildings supported on flexible soils[J].Earthquake Engineering Structure Dynamics,2000,29(6):47-65.
[2]潘开名,刘斌,刘之洋.叠层橡胶支座隔震结构地基-结构动力相互作用分析[J].东北大学学报:自然科学版,2002,23(1):71-74.
[3]GAZETAS G.Analysis of machine foundation vibrations:state of the art[J].Soil Dynamics and Earthquake Engineer-ing,1983,2(1):2-42.
[4]李杰,李国强.地震工程学导论[M].北京:地震出版社,1992:43-51.
[5]WU Wen-hwa.Equivalent fixed-base models for soil-stru-cture interaction systems[J].Soil Dynamics and Earthquake Engineering,1997,16(5):323-336.
[6]JEAN W Y,LIN T W,PENZIEN J.System parameters of soil foundations for time domain dynamic analysis[J].Earth-quake Engineering and Structural Dynamics,1990,19:541-553.
[2]潘开名,刘斌,刘之洋.叠层橡胶支座隔震结构地基-结构动力相互作用分析[J].东北大学学报:自然科学版,2002,23(1):71-74.
[3]GAZETAS G.Analysis of machine foundation vibrations:state of the art[J].Soil Dynamics and Earthquake Engineer-ing,1983,2(1):2-42.
[4]李杰,李国强.地震工程学导论[M].北京:地震出版社,1992:43-51.
[5]WU Wen-hwa.Equivalent fixed-base models for soil-stru-cture interaction systems[J].Soil Dynamics and Earthquake Engineering,1997,16(5):323-336.
[6]JEAN W Y,LIN T W,PENZIEN J.System parameters of soil foundations for time domain dynamic analysis[J].Earth-quake Engineering and Structural Dynamics,1990,19:541-553.
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