地铁车站水平地震动力响应分析
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摘要
研究目的:采用ANSYS软件计算某地铁车站的土-结构体系在地震荷载作用下的动力响应问题,对土-结构相互作用体系模型的建立、模型参数的确定、人工边界条件的设置等问题进行分析,探索地铁车站在水平地震作用下的内力和变形规律。研究结论:(1)地下结构的动力响应特征主要受周围土体介质的特性影响,在水平地震作用下,其水平位移受到周围土体的约束,随土体共同运动,沿结构高度变化不大;(2)结构的外围构件由于直接与土相互作用,一般承受较大的弯矩;(3)中间柱会产生较大的弯矩和剪力,易使中柱产生弯剪破坏;(4)本文结论可为地铁车站及其他地下结构的抗震设计提供借鉴。
Research purposes: This paper researches the dynamic response of a soil-structure system of one subway station under the seismic load with ANSYS software and analyzes the issues on establishment of the system interaction model for the soil structure,the determination of the model parameters and the setting up of the artificial boundary condition to seek the internal force and deformation behaviors of the subway station under seismic action. Research conclusions:(1)The characteristics of the dynamic response of underground structure was associated with the soil characteristics.The horizontal deformation of the underground structure was limited by the soil,with its movement with the soil and a little variation along the structure height.(2)The moment of the outside component was larger because of the direct contact with the soil.(3)The earthquake can increase the moment and the shearing force to the middle column significantly,so the column would be more easy to be damaged.(4)The results can provide reference to the seismic design of subway station or other underground structure.
Research purposes: This paper researches the dynamic response of a soil-structure system of one subway station under the seismic load with ANSYS software and analyzes the issues on establishment of the system interaction model for the soil structure,the determination of the model parameters and the setting up of the artificial boundary condition to seek the internal force and deformation behaviors of the subway station under seismic action. Research conclusions:(1)The characteristics of the dynamic response of underground structure was associated with the soil characteristics.The horizontal deformation of the underground structure was limited by the soil,with its movement with the soil and a little variation along the structure height.(2)The moment of the outside component was larger because of the direct contact with the soil.(3)The earthquake can increase the moment and the shearing force to the middle column significantly,so the column would be more easy to be damaged.(4)The results can provide reference to the seismic design of subway station or other underground structure.
引文
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[2]刘晶波,杜义欣,闫秋实.粘弹性人工边界及地震动输入在通用有限元软件中的实现[J].防灾减灾工程学报,2007(4):37-42.Liu Jingbo,Du Yixin,Yan Qiushi.Implementation ofSetting Visco-elastic Artificial Boundary andEarthquake Input in Finite Element Program[J].Journal of Disaster Prevention and MitigationEngineering,2007(4):37-42.
[3]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(9):1071-1075.Liu Jingbo,Gu Yin,Du Yixin.Consistent Viscous-spring Artificial Boundaries and Viscous-springBoundary Elements[J].Chinese Journal ofGeotechnical Engineering,2006(9):1071-1075.
[4]刘晶波,吕彦东.结构–地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998(3):55-64.Liu Jingbo,Lv Yandong.A Direct Method for Analysisof Dynamic Soil-structure Interaction[J].China CivilEngineering Journal,1998(3):55-64.
[5]王振宇.大型结构-地基系统动力反应计算理论及其应用研究[D].北京:清华大学,2002.Wang Zhenyu.Computational Theory of DynamicResponse of Large Structure-soil Systems and ItsApplication[D].Beijing:Tsinghua University,2002.
[6]杨林德,陆忠良,白廷辉.上海地铁车站抗震设计方法研究[R].上海:同济大学,2002.Yang Linde,Lu Zhongliang,Bai Tinghuil.Research onSeismic Design Method for Metro Station in Shanghai[R].Shanghai:Tongji University,2002.
[7]陈国兴,左熹,杜修力.土-地下结构体系地震反应的简化分析方法[J].岩土力学,2010(1):1-7.Chen Guoxing,Zuo Xi,Du Xiuli.A Simplified Methodof Seismic Response Analysis of Soil-undergroundStructure System[J].Rock and Soil Mechanics,2010(1):1-7.
[8]马险峰,杨林德.神户市地铁车站的震害及修复[J].铁道工程学报,1998(S):446-452.Ma Xianfeng,Yang Linde.Damage and Restoration ofthe Collapsed Daikai Subway Station during the 1995Hyogoken-Nambu Earthquake[J].Journal ofRailway Engineering Society,1998(S):446-452.
[9]刘志强,王飞,姚博.地铁隧道下卧土体动力特性模型试验研究[J].铁道工程学报,2011(9):92-96.Liu Zhiqiang,Wang Fei,Yao Bo.Model Test Researchon Dynamic Characteristics of the Underlying Soil forSubway Tunnel[J].Journal of Railway EngineeringSociety,2011(9):92-96.
[10]张长泰,张玉芳.饱和砂土中的地铁圆形衬砌隧道地震响应分析[J].铁道工程学报,2008(1):76-80.Zhang Changtai,Zhang Yufang.Analysis of SeismicResponse to the Metro Tunnel in Saturated Sand-soilArea[J].Journal of Railway Engineering Society,2008:76-80.
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