地基土-偏心结构平扭耦联分析模型与计算方法
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摘要
提出了地基土-偏心结构相互作用体系分析模型,建立了5自由度相互作用平扭耦联运动方程。根据相互作用体系的特点,假设上部结构具有正交阻尼,单独对其采用振型分解法进行解耦,从而减少了自由度数,获得了频域内解析过程,分析了地基土性质对偏心结构平扭耦联状况带来的影响,为分析地基土-偏心结构平扭耦联效应提供了一种有效的计算方法。
In order to study the effect of soil-structure interaction on the coupled lateral and torsional response of asymmetric buildings,this paper proposed the simplified soil-asymmetric structure interaction model,established 5-degree-of-freedom lateral-torsional coupling vibration equations of soil-asymmetric structure system.Supposing that the damp of superstructure is orthogonal,this paper used the modal analysis method to the superstructure individually.So the number of unknowns is reduced,which make it possible to obtain the analytical result in frequency domain.The effect of foundation on lateral-torsional coupling of asymmetric structure is learned.It provides an effective method to study torsional coupling of asymmetric structure with foundation interaction.
In order to study the effect of soil-structure interaction on the coupled lateral and torsional response of asymmetric buildings,this paper proposed the simplified soil-asymmetric structure interaction model,established 5-degree-of-freedom lateral-torsional coupling vibration equations of soil-asymmetric structure system.Supposing that the damp of superstructure is orthogonal,this paper used the modal analysis method to the superstructure individually.So the number of unknowns is reduced,which make it possible to obtain the analytical result in frequency domain.The effect of foundation on lateral-torsional coupling of asymmetric structure is learned.It provides an effective method to study torsional coupling of asymmetric structure with foundation interaction.
引文
[1]邬瑞锋,蔡贤辉,曲乃泗.多层及高层房屋扭转耦联弹塑性地震反应的研究[J].大连理工大学学报,1999,39(4):471—477.
[2]王耀伟,黄宗明.影响偏心结构地震反应的因素综述[J].防灾减灾工程学报,2004,24(1):112—116.
[3]Christopher Bode,Reinhold Hirschauer.Soil-struc-ture interaction in the time domain using halfspacegreen’s functions[J].Soil Dynamics and EarthquakeEngineering,2002,22(4):283—295.
[4]姜忻良,严宗达.结构-地基-结构相互作用地震反应分析[J].振动工程学报,1998,11(3):33—37.
[5]Chandler A M,Hutchinson G L.Parametric earth-quake response of torsionally coupled buildings withfoundation interaction[J].Soil Dynamics and Earth-quake Engineering,1987,6(3):138—148.
[6]Chandler A M,Hutchinson G L.Code design provi-sions for torsionally coupled buildings on elastic foun-dation[J].Earthquake Engineering and Structure Dy-namic,1987,15(4):517—536.
[7]Sivakumaran K S,Lin M S,Karasudhi P.Seismicanalysis of asymmetric building-foundation systems[J].Journal of Computers and Structures,1992,43(6):1 091—1 103.
[8]霍毅.土-偏心结构相互作用地震反应的参数分析[D].天津:天津大学,2006.
[9]王学艳.偏心结构-地基土相互作用平扭耦联参数分析[D].天津:天津大学,2007.
[10]Wu wen-hwa.Systematic assessment of irregularbuilding-soil interaction using efficient modal analysis[J].Earthquake Engineering and Structure Dynamic,2001,30(4):573—594.
[2]王耀伟,黄宗明.影响偏心结构地震反应的因素综述[J].防灾减灾工程学报,2004,24(1):112—116.
[3]Christopher Bode,Reinhold Hirschauer.Soil-struc-ture interaction in the time domain using halfspacegreen’s functions[J].Soil Dynamics and EarthquakeEngineering,2002,22(4):283—295.
[4]姜忻良,严宗达.结构-地基-结构相互作用地震反应分析[J].振动工程学报,1998,11(3):33—37.
[5]Chandler A M,Hutchinson G L.Parametric earth-quake response of torsionally coupled buildings withfoundation interaction[J].Soil Dynamics and Earth-quake Engineering,1987,6(3):138—148.
[6]Chandler A M,Hutchinson G L.Code design provi-sions for torsionally coupled buildings on elastic foun-dation[J].Earthquake Engineering and Structure Dy-namic,1987,15(4):517—536.
[7]Sivakumaran K S,Lin M S,Karasudhi P.Seismicanalysis of asymmetric building-foundation systems[J].Journal of Computers and Structures,1992,43(6):1 091—1 103.
[8]霍毅.土-偏心结构相互作用地震反应的参数分析[D].天津:天津大学,2006.
[9]王学艳.偏心结构-地基土相互作用平扭耦联参数分析[D].天津:天津大学,2007.
[10]Wu wen-hwa.Systematic assessment of irregularbuilding-soil interaction using efficient modal analysis[J].Earthquake Engineering and Structure Dynamic,2001,30(4):573—594.
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