软弱夹层对地铁车站结构的地震响应
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- 英文论文题名：The influence of soft interlayer the seismic responses of the subway station structure
- 论文作者：谢继安 ; 靳晓光 ; 李亚勇 ; 吕志涛
- 英文论文作者：XIE Jian ; JIN Xiaoguang ; LI Yayong ; LV Zhitao ; College of Civil Engineering ; Chongqing University ; Key Laboratory of New Technology for Construction of Mountain Area ; Ministry of Edution ; Chongqing University ; Tongji University
- 年：2016
- 作者机构：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室;同济大学;
- 论文关键词：软弱夹层 ; 地震响应 ; 加速度 ; 位移 ; 结构内力
- 英文论文关键词：weak interlayer ; seismic response ; the acceleration ; displacement ; structural internal force
- 会议召开时间：2016-10-27
- 会议录名称：第九届全国防震减灾工程学术研讨会论文集
- 语种：中文
- 分类号：TU311.3
- 学会代码：OGTY
- 会议名称：第九届全国防震减灾工程学术研讨会
- 会议地点：中国安徽合肥
- 主办单位：中国土木工程学会、中国工程院土木、水利与建筑工程学部、中国土木工程学会防震减灾工程技术推广委员会、合肥工业大学、安徽省住房和城乡建设厅
- 学会名称：中国土木工程学会
- 页数：8
- 文件大小：480k
- 原文格式：O
- 会议级别：全国
摘要
地铁车站结构抗震能力析是城市防震减灾研究的重要内容之一。岩土体中赋存的软弱夹层与临近岩土体物理、力学性质有较大差异,这有可能导致地震波传播规律和地铁车站动力响应规律的改变。为了研究软弱夹层对地铁车站结构地震响应的影响,利用有限差分软件FALC3D建立含软弱夹层的三维数值模型,开展地铁车站-岩体-上覆建筑物整体作用下的非线性动力响应分析。对比分析了有、无软弱夹层两种工况下地铁车站结构加速度、位移、内力的时程曲线。研究结果表明,存在软弱夹层工况下,车站结构变形较无软弱夹层时有显著增大,车站结构主要承受挤压变形。临近夹层部位地铁车站结构内力较无软弱夹层情况有较大的增长。其中,右拱腰最大弯矩值2775kN·m/m,增大了16.13倍;右拱腰最大剪力为-9114 kN/m,增大了2.35倍;右拱腰最大轴力为2534kN/m,增大了8.56倍。由此可见,软弱夹层的存在会放大结构位移和内力,对车站结构抗震性能产生不利的影响。
The subway station structure seismic capability is an important content of urban earthquake disaster reduction research.Occurrence of soft interlayer in rock mass and the adjacent rock mass physical an mechanical properties have bigger difference,this is likely to transform seismic wave propagation law and the law of dynamic response of subway station.In order to study the soft interlayer effect on the seismic response of subway station structure,using the finite difference software FALC3D set up a three — dimensional numerical model containing soft interlayer,in subway station — rock —overlying structures under the action of nonlinear dynamic response analysis as a whole.With soft interlayer contrast analysis of the two kinds of subway station structure under the condition of acceleration,displacement and internal force time history curve.The research results show that under the condition of existence of soft interlayer,the station structure deformation increase significantly in comparison to no soft interlayers,the station structure mainly bear extrusion deformation.The adjacent soft interlayer parts of subway station structure internal force in comparison to no soft interlayer have bigger growth.Among them,the right hance maximum bending moment of 2775 kN·m/m,increased 16.13 times.Hance maximum shear for right -9114kN/m,increased 2.35 times;right hance the maximum axial force is 2534 kN/m,increased 8.56 times.Thus,the existence of soft interlayer will enlarge the structure displacement and internal force,have an adverse effect on seismic performance of the structure of the station.
The subway station structure seismic capability is an important content of urban earthquake disaster reduction research.Occurrence of soft interlayer in rock mass and the adjacent rock mass physical an mechanical properties have bigger difference,this is likely to transform seismic wave propagation law and the law of dynamic response of subway station.In order to study the soft interlayer effect on the seismic response of subway station structure,using the finite difference software FALC3D set up a three — dimensional numerical model containing soft interlayer,in subway station — rock —overlying structures under the action of nonlinear dynamic response analysis as a whole.With soft interlayer contrast analysis of the two kinds of subway station structure under the condition of acceleration,displacement and internal force time history curve.The research results show that under the condition of existence of soft interlayer,the station structure deformation increase significantly in comparison to no soft interlayers,the station structure mainly bear extrusion deformation.The adjacent soft interlayer parts of subway station structure internal force in comparison to no soft interlayer have bigger growth.Among them,the right hance maximum bending moment of 2775 kN·m/m,increased 16.13 times.Hance maximum shear for right -9114kN/m,increased 2.35 times;right hance the maximum axial force is 2534 kN/m,increased 8.56 times.Thus,the existence of soft interlayer will enlarge the structure displacement and internal force,have an adverse effect on seismic performance of the structure of the station.
引文
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[2]HE Manchao.Mechanics for dynamic construction of rock mass and stability of surrounding rocks under complex conditions[M].Beijing;Science Press,1996
[3]张顶立,王悦汉.含夹矸顶煤破碎特点分析[J].中国矿业大学大学学报,2000,30(2):51-66(Zhang Dingli,Wang Yuehan.Analysis of failure characteristics of top-coal with rock parting[J].Journal of China University of Mining&Technology,2000,30(2):51-66(in Chinese))
[4]曹炳政,罗奇峰,马硕,等.神户大开地铁车站的地震反应分析[J].地震工程与工程,2002,22(4):102-107(Cao Bingzheng,Luo Qifeng,Ma-Shuo,et.Seismic response analysis of Dakai subway station in Hyogoken-nanbu earthquake[J],Earthquake Engineering and Engineering Vibration,2002,22(4):102-207(in Chinese)Engineering,2004,26(6):739-744.(in Chinese))
[5]陈国兴,庄海洋,徐烨.软弱地基浅埋隧洞对场地设计地震动的影响[J].岩土工程学报,2004,26(6):739-744(Chen Guoxing,Zhuang Haiyang,Xu Ye.A study on influence of excavated shallow tunnel on design parameters of ground motion in the soft site[J].Chinese Journal of Geotechnical Engineering,2004,26(6):739-744.(in Chinese))
[6]陈国兴.岩土地震工程学[M].北京:科学出版社,2007(Chen guoxing,Geotechnical Earthquake Engineering[M].Beijing:science press,2007.(in Chinese))
[7]Naoki Takahashi,MasayukiHyodo,Adrian F.L.Hyde,et al.Online earthquake response test for stratified layers of Clay and Sand[J].Journal of Geotechnical and Geoenvironmental Engineering,2006,132:611-621.
[8]Jean Philippe Groby,Armand Wirgin.Two dimensional ground motion at a soft viscoelastic layer/hard substratum site in response to SH cylindrical seismic waves radiated by deep and shallow line sources-I.Theory[J].Geophysical Journal International,2005,163:165-191.
[9]Jean Philippe Groby,Armand Wirgin.Two dimensional ground motion at a soft viscoelastic layer/hard substratum site in response to SH cylindrical seismic waves radiated by deep and shallow line sources-II.Numerical results[J].Geophysical Journal International,2005,163:192-224.
[10]庄海洋,王修信,陈国兴.软土层埋深变化对地铁车站结构地震反应的影响规律研究[J].岩土工程学报,2009,31(8):1258-1266(Zhang Haiyang,Wang Xiuxing,Cheng Guoxing,Earthquake responses of subway station with different depths of soft[J],soil Chinese Journal of Geotechnical Engineering,2009,31(8):1258-1266.(in Chinese))