三拱立柱式地铁地下车站结构三维精细化非线性地震反应分析
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摘要
基于ABAQUS软件研发的显式有限元并行计算集群平台,建立三拱立柱式地铁地下车站结构三维精细化有限元分析模型;研究大地震近场和远场地震动作用下地铁地下车站结构三维非线性地震反应特性。结果表明:地震作用下,三拱立柱式车站立柱底部为最危险部位,两侧副拱较中间主拱安全;两侧副拱拱璧损伤没有框架式车站结构外墙损伤严重;两侧副拱与竖向轴夹角约为30°处上、下拱壁上损伤指数最大;地铁地下车站结构峰值加速度沿车站纵轴线方向呈波浪状,纵轴线中点附近峰值加速度最大;三拱立柱式地铁车站的破坏主要和结构相对位移角有关,其破坏模式主要为剪切破坏。
At present,most studies on seismic responses of subway station structures are focused on framed subway stations.Based on software ABAQUS and the independently-developed 32 CPU parallel computing cluster platform,the three-dimensional refined finite element model was established for three-arch and two-column subway station structures.The 3D model was used to study the nonlinear seismic responses of the subway station structures under far-field and near-field ground motions.The results show as follows: Under ground motions,for the subway station structure,the bottoms of columns are the most dangerous position and the arches on both sides are safer than the main arch in the middle;the walls of both side archs are less damaged than the outer wall of framed subway station;the maximum seismic damage index appears on the upper and lower side arch walls at the position of the intersection angle of 30° between the side archs and vertical axes;the peak horizontal accelerations along the ordinate axis of the subway station show a wavy distribution and the maximum peak acceleration appears near the mid-section of the longitudinal axis;the damages to the three-arch and two-column subway station are mainly related to the relative displacement angle of the structure,meanwhile,the main failure mode is the shear failure.
At present,most studies on seismic responses of subway station structures are focused on framed subway stations.Based on software ABAQUS and the independently-developed 32 CPU parallel computing cluster platform,the three-dimensional refined finite element model was established for three-arch and two-column subway station structures.The 3D model was used to study the nonlinear seismic responses of the subway station structures under far-field and near-field ground motions.The results show as follows: Under ground motions,for the subway station structure,the bottoms of columns are the most dangerous position and the arches on both sides are safer than the main arch in the middle;the walls of both side archs are less damaged than the outer wall of framed subway station;the maximum seismic damage index appears on the upper and lower side arch walls at the position of the intersection angle of 30° between the side archs and vertical axes;the peak horizontal accelerations along the ordinate axis of the subway station show a wavy distribution and the maximum peak acceleration appears near the mid-section of the longitudinal axis;the damages to the three-arch and two-column subway station are mainly related to the relative displacement angle of the structure,meanwhile,the main failure mode is the shear failure.
引文
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[15]陈国兴,左熹,庄海洋,等.地铁车站结构大型振动台试验与数值模拟的比较研究[J].地震工程与工程振动,2008,28(1):157-164.CHEN Guo-xing,ZUO Xi,ZHUANG Hai-yang.A com-parison between Large-size Shaking Table Test Resultsand Numerical Simulation of a Subway Station Structure[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(1):157-164.
[16]HASHASH Y M,HOOK J J,SCHMIDT B,et al.Seis-mic Design and Analysis of Underground Structures[J].Tunneling and Underground Space Technology,2001,16(4):247-293.
[2]PARRA-MONTESINOS G J,BOBET A,RAMIREZ J A.Evaluation of Soil-structure Interaction and Structural Col-lapse in Daikai Subway Station during Kobe Earthquake[J].ACI Structural Journal,2006,103(1):113-122.
[3]HASHASH Y M,HOOK J J,SCHMIDT B,et al.Seis-mic Design and Analysis of Underground Structures[J].Tunneling and Underground Space Technology,2001,16(4):247-293.
[4]刘祥庆,刘晶波.基于纤维模型的拱形断面地铁车站结构弹塑性地震反应时程分析[J].工程力学,2008,25(10):150-157.LIU Xiang-qing,LIU Jing-bo.Time History Analysis ofElasto-plastic Seismic Response of a Subway Station Struc-ture with Arched Cross Section Based on Fiber Model[J].Engineering Mechanics,2008,25(10):150-157.
[5]刘晶波,王文晖,赵冬冬.地下结构横截面抗震设计分析方法综述[J].施工技术,2010,(6):91-95.LIU Jing-bo,WANG Wen-hui,ZHAO dong-dong.Reviewof Methods for Seismic Design and Analysis of Under-ground Structure Cross-section[J].Construction Technolo-gy,2010,(6):91-95.
[6]杨林德,商金华,宋作雷,等.软土地铁车站结构形式对抗震性能影响的研究[J].同济大学学报:自然科学版,2009,37(7):867-871.YANG Lin-de,SHANG Jin-hua,SONG Zuo-lei,et al.Study on Aseismatic Ability of Subway Station on Soft Soil[J].Journal of Tongji University:Natural Science,2009,37(7):867-871.
[7]CHEN Guo-xing,CHEN Lei,JING Li-ping,et al.Com-parison of Explicit And Implicit Finite Element Methodswith Parallel Computing for Seismic Response Analysis ofSubway Underground Structure[C]//International Sympo-sium on Geomechanics and Geotechnics.Shanghai:CRCPress,2010.
[8]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1070-1075.LIU Jing-bo,GU Yin,DU Yi-xin.Consistent Viscous-spring Artificial Boundaries and Viscous-spring BoundaryElements[J].Chinese Journal of Geotechnical Engineer-ing,2006,28(9):1070-1075.
[9]陈国兴,庄海洋.基于Davidenkov骨架曲线的土体动力本构关系及其参数研究[J].岩土工程学报,2005,27(8):860-864.CHEN Guo-xing,ZHUANG Hai-yang.Developed Nonlin-ear Dynamic Constitutive Relations of Soils Based on Davi-denkov Skeleton Curve[J].Chinese Journal of GeotechnicalEngineering,2005,27(8):860-864.
[10]LEE J,FENVES G L.Plastic-damage Model for CyclicLoading of Concrete Structures[J].Journal of Engineer-ing Mechanics,1998,124(4):892-900.
[11]陈磊,陈国兴.近断层强地震动下双层竖向重叠地铁隧道的地震反应[J].防灾减灾工程学报,2008,28(4):399-408.CHEN Lei,CHEN Guo-xing.Seismic Response of Two-layer Overlapping Metro Tunnel under Near-fault StrongGround Motion[J].Journal of Disaster Prevention andMitigation Engineering,2008,28(4):399-408.
[12]庄海洋,陈国兴,左熹.水平向地震下双层岛式地铁车站结构的动力变形特征[J].地震工程与工程振动,2007,27(6):140-147.ZHUANG Hai-yang,CHEN Guo-xing,ZUO Xi.Anays-is of Dynamic Deformation Characteristics of Two-layerSubway Station Structure under Horizontal Earthquakes[J].Journal of Earthquake Engineering and EngineeringVibration,2007,27(6):140-147.
[13]ABAQUS Inc.Analysis User’s Manual Volume III:Ma-terials[Z].Palo Alto:ABAQUS Inc,2007.
[14]陈磊,陈国兴.近场和远场地震动作用下双层竖向重叠地铁隧道的地震反应比较[J].中国铁道科学,2010,31(1):79-85.CHEN Lei,CHEN Guo-xing.Comparative Study on theCharacteristics of Seismic Responses of Two-layer Verti-cal Overlapping Metro Tunnels under Near-field and Far-field Ground Motions[J].China Railway Science,2010,31(1):79-85.
[15]陈国兴,左熹,庄海洋,等.地铁车站结构大型振动台试验与数值模拟的比较研究[J].地震工程与工程振动,2008,28(1):157-164.CHEN Guo-xing,ZUO Xi,ZHUANG Hai-yang.A com-parison between Large-size Shaking Table Test Resultsand Numerical Simulation of a Subway Station Structure[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(1):157-164.
[16]HASHASH Y M,HOOK J J,SCHMIDT B,et al.Seis-mic Design and Analysis of Underground Structures[J].Tunneling and Underground Space Technology,2001,16(4):247-293.
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