偏心结构-地基土相互作用平扭耦联参数的范围及影响分析
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摘要
为研究地基土对偏心结构带来的影响,该文提出偏心结构-地基土相互作用体系简化计算模型,通过偏心结构-地基土相互作用平扭耦联运动方程的解析过程,确定了影响结构弹性反应的主要参数,并对考虑相互作用后参数的范围进行了确认。应用时程分析法,对结构进行弹性时程法和解析法的参数影响的对比分析,验证了时程分析法的可行性,进而应用时程分析法分析弹塑性阶段参数对结构体系的影响,得到了弹塑性阶段振型相对位移比存在局部增大等结果。研究结果为结构地震扭转效应的工程计算和设计提供参考。
In order to study the influence of foundation soil on eccentric structure, this paper sets up the simplified foundation-asymmetric structure interaction model and derives the main influencing factors and their ranges that influence the structure's elastic response by solving the lateral-torsional coupling equation of the foundation-asymmetric structure interaction system. The parameters' elastic influencing rules derived by time-history analysis coincide well with analytic solutions, which verify the effectiveness of the time-history analysis. Through using the time-history analysis, this paper studies the laws how the parameters influence the inelastic seismic response. It produces local amplification of relative displacement by comparing the inelastic seismic response with the elastic seismic response. The conclusions provide references for the design and calculation of asymmetric structures under earthquake.
In order to study the influence of foundation soil on eccentric structure, this paper sets up the simplified foundation-asymmetric structure interaction model and derives the main influencing factors and their ranges that influence the structure's elastic response by solving the lateral-torsional coupling equation of the foundation-asymmetric structure interaction system. The parameters' elastic influencing rules derived by time-history analysis coincide well with analytic solutions, which verify the effectiveness of the time-history analysis. Through using the time-history analysis, this paper studies the laws how the parameters influence the inelastic seismic response. It produces local amplification of relative displacement by comparing the inelastic seismic response with the elastic seismic response. The conclusions provide references for the design and calculation of asymmetric structures under earthquake.
引文
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[11]吴香香,李宏男.结构偏心对基础隔震结构地震反应的影响[J].地震工程与工程振动,2003,23(1):145―151.Wu Xiangxiang,Li Hongnan.Effects of structural eccentricity on seismic responses of base-isolated structures[J].Earthquake Engineering and Engineering Vibration,2003,23(1):145―151.(in Chinese)
[2]Chandler A M.Parametric earthquake response of torsionally coupled buildings with foundation interaction[J].Soil Dynamics and Earthquake Engineering,1987,6(3):138―148.
[3]Wu WH.Systematic assessment of irregular building-soil interaction using efficient modal analysis[J].Earthquake Engineering and Structure Dynamic,2001,30:573―594.
[4]Shakib H.Evaluation of dynamic eccentricity by considering soil-structure interaction:A proposal for seismic design codes[J].Soil Dynamics and Earthquake Engineering,2004,24(5):369―378.
[5]Shakib H.Dynamic soil-structure interaction effects on the seismic response of asymmetric buildings[J].Soil Dynamics and Earthquake Engineering,2004,24(5):379―388.
[6]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.Wu Ruifeng,Cai Xianhui,Qu Naisi.Study on inelastic torsional coupled seismic response of multi-storey and high-rise buildings[J].Journal of Dalian University ofTechnology,1999,39(4):471―477.(in Chinese)
[7]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.Jiang Xinliang,Yan Zhongda.Earthquake response analysis of building-foundation-building interaction system[J].Journal of Vibration Engineering,1998,11(3):33―37.(in Chinese)
[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.Huo Yi.Parameter analysis on the seismic behaviour of soil-asymmetric structure interaction system[D].Tianjin:Tianjin University,2006.(in Chinese)
[9]刘大海,杨翠如,钟锡根.高层建筑抗震设计[M].北京:中国建筑工业出版社,1993.Liu Dahai,Yang Cuiru,Zhong Xigen.Seismic design of tall buildings[M].Beijing:China Architectural Industrial Press,1993.(in Chinese)
[10]李辉.土-结构动力相互作用研究综述(II)[J].重庆建筑大学学报,1999,21(4):112―116.Li Hui.A summary of research in soil-structure dynamic interaction(II)[J].Journal of Chongqing Jianzhu University,1999,21(4):112―116.(in Chinese)
[11]吴香香,李宏男.结构偏心对基础隔震结构地震反应的影响[J].地震工程与工程振动,2003,23(1):145―151.Wu Xiangxiang,Li Hongnan.Effects of structural eccentricity on seismic responses of base-isolated structures[J].Earthquake Engineering and Engineering Vibration,2003,23(1):145―151.(in Chinese)
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