城市地铁车站地下结构地震反应
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摘要
针对地震作用下地铁结构动力学响应的安全问题,基于弹性地基梁理论,利用大型通用有限元计算软件ADINA建立了三层岛式地铁车站结构有限元计算模型,研究地铁的多遇地震与罕遇地震的动力学响应的影响因素,对车站进行了静力分析、谱反应分析以及动力时程分析,总结了地铁结构的地震响应规律.分析结果表明:多遇地震作用下,随着高度的增加地铁车站结构的层间位移随之增大,梁柱连接处的应力较大,楼板跨中节点的应力最小;罕遇地震作用下地铁结构变化有着相似的趋势,但是罕遇地震的位移要远大于多遇地震下的水平位移.
For the safety problem of the subway structure's dynamic response under seismic loading, based on the elastic foundation beam theory, this paper established the finite element three calculation model of subway station structure layer island by using the large general finite element software ADINA, studied the influence factors of dynamic response of the frequently occurred earthquakes and rarely occurred earthquake, and carried out static analysis, spectrum response analysis and dynamic time history analysis to the station, and summarized the earthquake response of subway structure. The analysis results show that with the more severe earthquakes, story drift increases with the increase of height of subway station structure, and stress of the beam-column joints is larger, and the stress of floor across nodes is the minimum; under the action of severe earthquake the subway structure change had a similar trend, but the displacement of rarely occurred earthquake is much greater than the horizontal displacement under severe earthquakes.
For the safety problem of the subway structure's dynamic response under seismic loading, based on the elastic foundation beam theory, this paper established the finite element three calculation model of subway station structure layer island by using the large general finite element software ADINA, studied the influence factors of dynamic response of the frequently occurred earthquakes and rarely occurred earthquake, and carried out static analysis, spectrum response analysis and dynamic time history analysis to the station, and summarized the earthquake response of subway structure. The analysis results show that with the more severe earthquakes, story drift increases with the increase of height of subway station structure, and stress of the beam-column joints is larger, and the stress of floor across nodes is the minimum; under the action of severe earthquake the subway structure change had a similar trend, but the displacement of rarely occurred earthquake is much greater than the horizontal displacement under severe earthquakes.
引文
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[9]刘晶波,李彬.地铁地下结构抗震分析及设计中的几个关键问题[J].土木工程学报,2006,39(6):106-107.Liu Jingbo,Li Bin.Issues on the seismic analysis and design of subway structures[J].China Civil Engineering Journal,2006,39(6):106-107.
[10]刘根.高烈度地震区隧道地震动力响应研究[D].成都:西南交通大学,2008.Liu Gen.Research on seismic dynamic response of tunnel in high-intensity area[D].Chengdu:Southwest Jiaotong University,2008.
[2]顾俊.地铁隧道结构地震非线性动力响应分析[D].南京:河海大学,2007.Gu Jun.Study on seismic non-liner dynamic response for the subway tunnel structure[D].Nanjing:Hohai University,2007.
[3]张裕,刘元雪,赵吉昌.地下结构地震响应理论分析研究现状与展望[J].重庆建筑,2012,11(104):44-45.Zhang Yu,Liu Yuanxue,Zhao Jichang.The state of art of seismic response theoretical analysis of underground structure[J].Chongqing Architecture,2012,11(104):44-45.
[4]耿东阳,赵文,周永伟,等.瑞雷波勘探在地铁车站中的应用分析[J].辽宁工程技术大学学报:自然科学版,2010,29(2):236-239.Geng Dongyang,Zhao Wen,Zhou Yongwei,et al.Application and analysis of Ralyleigh wave prospecting in subway station[J].Journal of Liaoning Technical University:Natural Science,2010,29(2):236-239.
[5]刘海卿,陈振西,袁景.强震作用下高层框架结构倒塌破坏三维仿真[J].辽宁工程技术大学学报:自然科学版,2010,29(6):1 074-1 077.Liu Haiqing,Chen Zhenxi,Yuan Jing.3-D simulation on collapse of high-rise structures under strong earthquake.[J].Journal of Liaoning Technical University:Natural Science,2010,29(6):1 074-1 077.
[6]郑小琼.地下结构地震响应及其对地表的影响分析[D].大连:大连理工大学,2012.Zheng Xiaoqiong.Research on seismic response of underground structures and its interaction with ground[D].Dalian:Dalian University of Technology,2012.
[7]庄海洋,陈国兴.软弱地基浅埋地铁区间隧洞的地震反应分析[J].岩石力学与工程学报,2005,24(14):2 506-2512.Zhuang Haiyang,Chen Guoxing.Earthquake response of shallow subway tunnels in soft foundation[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2 506-2 512.
[8]蒋建群,卢慈荣,沈林冲.盾构法隧道纵向地震响应特性[J].中国铁道科学,2005,26(6):84-88.Jiang Jianqun,Lu Cirong,Shen Linchong.The characteristics on nonlinear longitudinal seismicresponse of shield tunnel[J].China Railway Science,2005,26(6):84-88.
[9]刘晶波,李彬.地铁地下结构抗震分析及设计中的几个关键问题[J].土木工程学报,2006,39(6):106-107.Liu Jingbo,Li Bin.Issues on the seismic analysis and design of subway structures[J].China Civil Engineering Journal,2006,39(6):106-107.
[10]刘根.高烈度地震区隧道地震动力响应研究[D].成都:西南交通大学,2008.Liu Gen.Research on seismic dynamic response of tunnel in high-intensity area[D].Chengdu:Southwest Jiaotong University,2008.
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