苏巴什东寺佛塔的地震动力响应
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摘要
为更好地保护土遗址,用FLAC3D软件对苏巴什佛寺东寺佛塔进行了地震响应分析,包括佛塔位移、应力以及地震波的加速度放大系数和傅立叶谱.结果表明:在地震荷载作用下,该佛塔产生了一定永久位移,佛塔内部产生了拉应力集中;地面以下地震加速度存在弱化现象,地面以上地震加速度存在放大现象,地震加速度放大系数随距地表高度的增大而增大,佛塔顶端达2.5;地基土体对高频波具有滤波作用,佛塔顶端低频波存在放大现象,对高频波也有滤波作用.
To better protect earthen heritage sites,software FLAC3D was used to analyze the seismic response of the east temple pagoda of the Subashi Temple,and the seismic-induced displacement and stresses of the pagoda and the acceleration amplification factor and Fourier spectra of seismic waves were investigated.The results show that the pagoda produces a permanent displacement and has a tensile stress concentration under seismic loads.The seismic acceleration is weaken below the ground but amplified above the ground.The amplification factor of seismic acceleration raises with the increase of height away from the ground surface and reaches to 2.5 at the top of the pagoda.Both foundation soil and the pagoda top have a filter function to high-frequency waves,and low-frequency waves are amplified at the top of the pagoda.
To better protect earthen heritage sites,software FLAC3D was used to analyze the seismic response of the east temple pagoda of the Subashi Temple,and the seismic-induced displacement and stresses of the pagoda and the acceleration amplification factor and Fourier spectra of seismic waves were investigated.The results show that the pagoda produces a permanent displacement and has a tensile stress concentration under seismic loads.The seismic acceleration is weaken below the ground but amplified above the ground.The amplification factor of seismic acceleration raises with the increase of height away from the ground surface and reaches to 2.5 at the top of the pagoda.Both foundation soil and the pagoda top have a filter function to high-frequency waves,and low-frequency waves are amplified at the top of the pagoda.
引文
[1]祁生文.边坡动力响应研究及应用[D].北京:中国科学院地质与地球物理研究所,2002.
[2]ISHIZAKI H Y.Consideration on the dynamicalbehavior of earth dams[R].Kyoto:Kyoto University,1963.
[3]HASHASH Y M A,HOOK J J,SCHMIDT B,et al.Seismic design and analysis of underground struc-tures[J].Tunnelling and Underground SpaceTechnology,2001,16(4):247-293.
[4]HASHEMINAJAD S M,KAZEMIRAD S.Dynamicresponse of an eccentrically lined circular tunnel inporoelastic soil under seismic excitation[J].SoilDynamics and Earthquake Engineering,2008,28(4):277-292.
[5]NAM S H,SONG H W,BYUN K J,et al.Seismicanalysis of underground reinforced concrete structuresconsidering elasto-plastic interface element withthickness[J].Engineering Structures,2006,28(8):1122-1131.
[6]徐光兴,姚令侃,李朝红,等.边坡地震动力响应规律及地震动参数影响研究[J].岩土工程学报,2008,30(6):918-923.XU Guangxing,YAO Lingkan,LI Zhaohong,et al.Dynamic response of slopes under earthquakes andinfluence of ground motion parameters[J].ChineseJournal of Geotechnical Engineering,2008,30(6):918-923.
[7]杨涛,游湘,秦永涛,等.用点安全系数分析滑坡的空间滑动机理[J].西南交通大学学报,2010,45(5):794-799.YANG Tao,YOU Xiang,QIN Yongtao,et al.Application of point safety factor to study on spatialsliding mechanism of landslide[J].Journal of SouthwestJiaotong University,2010,45(5):794-799.
[8]李海波,马行东,李俊如,等.地震荷载作用下地下岩体洞室位移特征的影响因素分析[J].岩土工程学报,2006,28(3):358-361.LI Haibo,MA Xingdong,LI Junru,et al.Study oninfluence factors of rock cavern displacement underearthquake[J].Chinese Journal of GeotechnicalEngineering,2006,28(3):358-362.
[9]何满潮,王树仁,杨国兴,等.国家重点文物保护工程——高句丽将军坟变形破坏机制研究[J].岩石力学与工程学报,2005,24(13):2220-2224.HE Manchao,WANG Shuren,YANG Guoxing,et al.Study on deformation failure mechanism of Gao Gouli'sJiangjunfen of national key culture relics preservationengineering[J].Chinese Journal of Rock Mechanicsand Engineering,2005,24(13):2220-2224.
[10]何满潮,黄润秋,王金安,等.工程地质数值法[M].北京:科学出版社,2006:129-137.
[11]刘波,韩彦辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005:3-14.
[12]WILKINS M L.Calculations of elastic-plasticflow[C]∥ALDER B.Methods of ComputationalPhysics.New York:Academic Press,1964:21-26.
[13]张培文,陈祖煜.弹性模量和泊松比对边坡稳定安全系数的影响[J].岩土力学,2006,27(2):299-303.ZHANG Peiwen,CHEN Zuyu.Influences of soilelastic modulus and Poisson's ratio on slopestability[J].Rock and Soil Mechanics,2006,27(2):299-303.
[14]徐卫亚,肖武.基于强度折减和重度增加的边坡破坏判据研究[J].岩土力学,2007,28(3):505-511.XU Weiya,XIAO Wu.Study on slope failure criterionbased on strength reduction and gravity increasemethod[J].Rock and Soil Mechanics,2007,28(3):505-511.
[15]陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2008:175-200.
[16]郑颖人,沈珠江,龚晓南.岩土塑性力学原理[M].北京:中国建筑工业出版社,2002:68-120.
[17]刘春玲,祁生文.利用FLAC3D分析某边坡地震稳定性[J].岩石力学与工程学报,2004,23(16):2730-2733.LIU Chunling,QI Shengwen.Stability analysis ofslope under earthquake with FLAC3D[J].ChineseJournal of Rock Mechanics and Engineering,2004,23(16):2730-2733.
[2]ISHIZAKI H Y.Consideration on the dynamicalbehavior of earth dams[R].Kyoto:Kyoto University,1963.
[3]HASHASH Y M A,HOOK J J,SCHMIDT B,et al.Seismic design and analysis of underground struc-tures[J].Tunnelling and Underground SpaceTechnology,2001,16(4):247-293.
[4]HASHEMINAJAD S M,KAZEMIRAD S.Dynamicresponse of an eccentrically lined circular tunnel inporoelastic soil under seismic excitation[J].SoilDynamics and Earthquake Engineering,2008,28(4):277-292.
[5]NAM S H,SONG H W,BYUN K J,et al.Seismicanalysis of underground reinforced concrete structuresconsidering elasto-plastic interface element withthickness[J].Engineering Structures,2006,28(8):1122-1131.
[6]徐光兴,姚令侃,李朝红,等.边坡地震动力响应规律及地震动参数影响研究[J].岩土工程学报,2008,30(6):918-923.XU Guangxing,YAO Lingkan,LI Zhaohong,et al.Dynamic response of slopes under earthquakes andinfluence of ground motion parameters[J].ChineseJournal of Geotechnical Engineering,2008,30(6):918-923.
[7]杨涛,游湘,秦永涛,等.用点安全系数分析滑坡的空间滑动机理[J].西南交通大学学报,2010,45(5):794-799.YANG Tao,YOU Xiang,QIN Yongtao,et al.Application of point safety factor to study on spatialsliding mechanism of landslide[J].Journal of SouthwestJiaotong University,2010,45(5):794-799.
[8]李海波,马行东,李俊如,等.地震荷载作用下地下岩体洞室位移特征的影响因素分析[J].岩土工程学报,2006,28(3):358-361.LI Haibo,MA Xingdong,LI Junru,et al.Study oninfluence factors of rock cavern displacement underearthquake[J].Chinese Journal of GeotechnicalEngineering,2006,28(3):358-362.
[9]何满潮,王树仁,杨国兴,等.国家重点文物保护工程——高句丽将军坟变形破坏机制研究[J].岩石力学与工程学报,2005,24(13):2220-2224.HE Manchao,WANG Shuren,YANG Guoxing,et al.Study on deformation failure mechanism of Gao Gouli'sJiangjunfen of national key culture relics preservationengineering[J].Chinese Journal of Rock Mechanicsand Engineering,2005,24(13):2220-2224.
[10]何满潮,黄润秋,王金安,等.工程地质数值法[M].北京:科学出版社,2006:129-137.
[11]刘波,韩彦辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005:3-14.
[12]WILKINS M L.Calculations of elastic-plasticflow[C]∥ALDER B.Methods of ComputationalPhysics.New York:Academic Press,1964:21-26.
[13]张培文,陈祖煜.弹性模量和泊松比对边坡稳定安全系数的影响[J].岩土力学,2006,27(2):299-303.ZHANG Peiwen,CHEN Zuyu.Influences of soilelastic modulus and Poisson's ratio on slopestability[J].Rock and Soil Mechanics,2006,27(2):299-303.
[14]徐卫亚,肖武.基于强度折减和重度增加的边坡破坏判据研究[J].岩土力学,2007,28(3):505-511.XU Weiya,XIAO Wu.Study on slope failure criterionbased on strength reduction and gravity increasemethod[J].Rock and Soil Mechanics,2007,28(3):505-511.
[15]陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2008:175-200.
[16]郑颖人,沈珠江,龚晓南.岩土塑性力学原理[M].北京:中国建筑工业出版社,2002:68-120.
[17]刘春玲,祁生文.利用FLAC3D分析某边坡地震稳定性[J].岩石力学与工程学报,2004,23(16):2730-2733.LIU Chunling,QI Shengwen.Stability analysis ofslope under earthquake with FLAC3D[J].ChineseJournal of Rock Mechanics and Engineering,2004,23(16):2730-2733.
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