地基土-两层偏心结构相互作用体系平扭耦联参数分析

英文篇名：Parametric analysis for translational-torsional coupling of a system of eccentric two-tier building and foundation interaction
中文刊名：振动与冲击
英文刊名：Journal of Vibration and Shock
作者：王美丽 ; 姜忻良
英文作者：WANG Mei-li1 ; 2 ; JIANG Xin-liang1 ; 3(1.School of Civil Engineering ; Tianjin University ; Tianjin 300072 ; China ; 2.General Courses Department ; Institute of Military Transportation ; Tianjin 300161 ; China ; 3.Tianjin Key Laboratory of Civil Engineering Structure and New Materials ; Tianjin 300072 ; China)
中文关键词：两层偏心结构 ; 强解耦 ; 土-结构相互作用 ; 平扭耦联 ; 频域分析 ; 参数分析
英文关键词：eccentric two-tier building ; forced decoupling method ; soil-structure interaction ; translational-torsional coupling ; frequency domain analysis ; parametric analysis
出版日期：2012-04-15
机构：天津大学建工学院;军事交通学院基础部;天津市土木工程结构及新材料重点实验室;
年：2012
期：07
出版单位：振动与冲击

摘要

为研究地基土-两层偏心结构相互作用体系的地震反应,对平扭耦联问题进行参数分析。利用拉格朗日能量法建立土-两层偏心结构相互作用体系平扭耦联运动方程,求得频域内解析解,编制MATLAB程序,确定影响两层偏心结构平扭耦联的主要参数,详细分析扭平频率比Ω、偏心率B、偏心楼层位置和地基土特性等参数对相互作用体系弹性地震反应的影响规律,以及对平扭耦联程度的影响状况,得到一些与刚基上偏心结构平扭耦联反应不同的参数影响规律,为工程计算和设计提供参考。
In order to study the earthquake response of a system of eccentric two-tier building and foundation interaction,parametric analysis for its translational-torsional coupled response was conducted here.Translational-torsional coupling vibration equations of a soil-asymmetric structure interaction system were established with Lagrangian energy method.The analytical solution in frequency domain was obtained and a MATLAB program was made.Then,the main parameters influencing the translational-torsional coupled response were determined and the influence law of torsional to translational frequency ratio Ω,eccentricity ratio B,the location of eccentric floor and the foundation soil properties on the elastic seismic response and the translational-torsional coupling level of the interaction system were thoroughly analyzed.Finally,some valuable conclusions different from those for the structure on rigid foundation were obtained,providing a reference for engineering calculation and design of structure.

引文

[1]杨绍瑞,张善元.一类多层扭转耦联结构弹性地震反应的摄动解[J].地震工程与工程振动,1988,8(2):68-78.
    [2]李宏男,尹之潜.偏心结构在多维地震作用下扭转耦联反应分析[J].地震工程与工程振动,1988,8(4):45-53.
    [3]Duan X N,Chandler A M.Inelastic seismic response of code-designed multistory frame buildings with regular asymmetry[J].Earthquake Engineering and Structural Dynamics,1993,22(5):431-445.
    [4]蔡贤辉,邬瑞锋,曲乃泗.一类多层偏心结构的地震反应研究[J].地震工程与工程振动,1999,19(4):55-60.
    [5]Jarernprasert S.Inelastic design approach for asymmetric structure-foundation systems[D].Pittsburgh:Carnegie Mellon University,2005.
    [6]姜忻良,王美丽,王学艳.基于强解耦方法的土-结构平扭耦联参数分析[J].振动与冲击,2009,28(10):154-157.
    [7]姜忻良,王美丽,王学艳.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[J].工程力学,2009,26(03):73-78.
    [8]Hejal R,Chopra A K.Lateral-torsional coupling in earthquake response of frame buildings[J].Journal of Structural Engineering,1989,115(4):852-867.
    [9]Hejal R,Chopra A K.Earthquake response of torsionally coupled frame buildings[J].Journal of Structural Engineering,1989,115(4):834-851.
    [10]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.