地震作用下某明挖地铁站三维动力时程分析
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摘要
基于ABAQUS对某明挖地铁站进行了三维动力时程分析。该明挖站空间较复杂,横断面为变截面,需要进行罕遇地震下的抗震验算,并考虑土–结构动力相互作用。模型分别采用ANSYS和ABAQUS进行建模和分析,通过自行编制的接口程序将模型从ANSYS导入ABAQUS。土体采用了三维黏弹性动力本构,边界采用黏弹性动力边界条件,基岩波以加速度从基底输入。计算结果表明,该明挖地铁站中柱底部边缘混凝土纤维进入塑性状态,局部混凝土开裂,没有出现倒塌破坏。该计算方法可以为类似工程提供参考。
Three-dimensional dynamic analysis of an open excavation subway station under earthquake is carried out.The space of subway station is complex,and the transverse section is variable.Major earthquake analysis must be performed.Soil-structure dynamic interaction is also need to be considered.The subway station is modeled and analyzed by means of the software ANSYS and ABAQUS respectively.The ANSYS model is introduced into ABAQUS based on a programming interface coded by the authors.A three-dimensional viscoelastic dynamic constitutive model is used to simulate the soils.Three-dimensional viscoelastic artificial boundary is applied.Seismic wave of bedrock is input as the acceleration.The results demonstrate that edge concrete fiber at the bottom of interior column enters into the plastic stage,and local damage but no collapse damage is found.The proposed method may help engineers in similar projects.
Three-dimensional dynamic analysis of an open excavation subway station under earthquake is carried out.The space of subway station is complex,and the transverse section is variable.Major earthquake analysis must be performed.Soil-structure dynamic interaction is also need to be considered.The subway station is modeled and analyzed by means of the software ANSYS and ABAQUS respectively.The ANSYS model is introduced into ABAQUS based on a programming interface coded by the authors.A three-dimensional viscoelastic dynamic constitutive model is used to simulate the soils.Three-dimensional viscoelastic artificial boundary is applied.Seismic wave of bedrock is input as the acceleration.The results demonstrate that edge concrete fiber at the bottom of interior column enters into the plastic stage,and local damage but no collapse damage is found.The proposed method may help engineers in similar projects.
引文
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[2]庄海洋,程绍革,陈国兴.阪神地震中大开地铁车站震害机制数值仿真分析[J].岩土力学,2008,29(1):245–250.(ZHUANG Hai-yang,CHENG Shao-ge,CHEN Guo-xing.Numerical simulation and analysis of earthquake damages ofDakai metro station caused by Kobe earthquake[J].Rock andSoil Mechanics.2008,29(1):245–250.(in Chinese))
[3]LIU J,DU Y,DU X,et al.3D viscous-spring artificialboundary in time domain[J].Earthquake Engineering andEngineering Vibration,2006,5(1):93–102.
[4]DU Xiu-li,TU Jin.Nonlinear seismic response analysis of archdam-foundation systems-part II:opening and closing contactjoints[J].Bulletin of Earthquake Engineering,2007,5(1):121–133.
[5]费康,郑憩.等效线性动力模型在ADINA中的实现[J].扬州大学学报(自然科学版),2008,11(4):74–78.(FEIKang,ZHENG Qi.Implementation of equivalent linearmodel in ADINA[J].Journal of Yangzhou University(NaturalScience Edition),2008,11(4):74–78.(in Chinese))
[6]费康,刘汉龙.ABAQUS的二次开发及在土石坝静、动力分析中的应用[J].岩土力学,2010,31(3):881–890.(FEI Kang,LIU Han-long.Secondary development ofABAQUS and its application to static and dynamic analysesof earth-rockfill dam[J].Rock and Soil Mechanics,2010,31(3):881–890.(in Chinese))
[7]陈磊,陈国兴,龙慧.地铁交叉隧道近场强地震反应特性的三维精细化非线性有限元分析[J].岩土力学,2010,31(12):3971–3983.(CHEN Lei,CHEN Guo-xing,LONG Hui.3D refined nonlinear finite element analysis of intersectingmetro tunnels under near-field ground motion[J].Rock and SoilMechanics,2010,31(12):3971–3983.(in Chinese))
[8]庄海洋,陈国兴,胡晓明.两层双柱岛式地铁车站结构水平向非线性地震反应分析[J].岩石力学与工程学报,2006,25(增刊):3074–3079.(ZHUANG Hai-yang,CHENGuo-xing,HU Xiao-ming.Analysis of nonlinear earthquakeresponse of two-layer double-column subway stationstructure[J].Chinese Journal of Rock Mechanics andEngineering,2006,25(S0):3074–3079.(in Chinese))
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