考虑成层土体的地铁隧道地震动力响应分析
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摘要
考虑了土体的粘弹性,采用非均质土-结的计算模型,结合动力学理论,分析了结构的本构模型、人工边界条件以及土-结的接触问题,主要探讨了地震作用下地铁隧道的动力响应特征。依托实际工程,在ANSYS中建立数值模型并输入实际材料参数,施加粘弹性人工边界,参考武汉地区抗震设防的要求,垂直入射天津波。通过该模型的模态分析、时程分析表明:结构在地震作用下的响应与衬砌混凝土等级、衬砌厚度有关,并且土体加固后对结构抗震性能有很大影响。最后,对衬砌在地震作用下的安全性进行了分析,为地铁隧道的抗震设计提供了依据。
Based on theory of visco-elasticity and dynamics,using the computation model of heterogeneity soil-structure,this paper analyses the constitutive model,artificial boundary conditions and the contact problem of soil-structure,and mainly discusses the dynamic response characteristics of the tunnel under the action of seismic. Based on practical engineering projects,building numerical model and inputting practical material parameters in the ANSYS,adding visco-elasticity artificial boundary,and referring to the code requirement for seismic design of buildings in Wuhan,Tianjin wave is perpendicular to the incident plane. The numerical results show that: the response of the structure under the action of seismic related to the concrete grade and thickness of the lining,and the reinforced soil has a great influence on the anti-seismic performance of the structure. At last,this paper analyses the safety of the lining under the action of seismic,which provides the basis for the anti-seismic design of subway tunnel.
Based on theory of visco-elasticity and dynamics,using the computation model of heterogeneity soil-structure,this paper analyses the constitutive model,artificial boundary conditions and the contact problem of soil-structure,and mainly discusses the dynamic response characteristics of the tunnel under the action of seismic. Based on practical engineering projects,building numerical model and inputting practical material parameters in the ANSYS,adding visco-elasticity artificial boundary,and referring to the code requirement for seismic design of buildings in Wuhan,Tianjin wave is perpendicular to the incident plane. The numerical results show that: the response of the structure under the action of seismic related to the concrete grade and thickness of the lining,and the reinforced soil has a great influence on the anti-seismic performance of the structure. At last,this paper analyses the safety of the lining under the action of seismic,which provides the basis for the anti-seismic design of subway tunnel.
引文
[1]黄胜.高烈度地震下隧道破坏机制及抗震研究[D].武汉:中国科学院研究生院(武汉岩土力学研究所),2010.
[2]皇民.地铁车站与区间隧道过渡段的抗震设计分析[D].成都:西南交通大学,2009.
[3]杨雪强,凌平平,向胜华.基于系列Drucker-Prager破坏准则评述土坡的稳定性[J].岩土力学,2009,30(4):865-870.
[4]刘智勇.海底水工隧道的抗震安全性研究[D].上海:同济大学,2008.
[5]卢慈荣.盾构法隧道纵向非线性地震响应分析与抗震设计研究[D].杭州:浙江大学,2005.
[6]Krauthammer T,Chen Y.Soil-structure interface effects on dynamic interaction analysis of reinforced concrete lifelines[J].Soil Dynamic and Earthquake Engineering,1989,8(1):32-42.
[7]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,2007,27(s1):36-42.
[8]眭志荣.单拱四车道公路隧道施工方法及动力响应三维数值分析研究[D].长沙:中南大学,2008.
[9]刘洁平.高层建筑土-结构相互作用地震反应分析研究[D].哈尔滨:中国地震局工程力学研究所,2009.
[10]朱永生.浅埋隧道地震动力响应数值分析及研究[D].成都:西南交通大学,2006.
[11]王国波.软土地铁车站结构三维地震响应计算理论与方法的研究[D].上海:同济大学,2007.
[12]杨林德,王国波,郑永来,等.地铁车站结构振动台试验及地震响应的三维数值模拟[J].岩石力学与工程学报,2007,26(8):1538-1545.
[13]GB 50011-2010,建筑抗震设计规范[S].
[2]皇民.地铁车站与区间隧道过渡段的抗震设计分析[D].成都:西南交通大学,2009.
[3]杨雪强,凌平平,向胜华.基于系列Drucker-Prager破坏准则评述土坡的稳定性[J].岩土力学,2009,30(4):865-870.
[4]刘智勇.海底水工隧道的抗震安全性研究[D].上海:同济大学,2008.
[5]卢慈荣.盾构法隧道纵向非线性地震响应分析与抗震设计研究[D].杭州:浙江大学,2005.
[6]Krauthammer T,Chen Y.Soil-structure interface effects on dynamic interaction analysis of reinforced concrete lifelines[J].Soil Dynamic and Earthquake Engineering,1989,8(1):32-42.
[7]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,2007,27(s1):36-42.
[8]眭志荣.单拱四车道公路隧道施工方法及动力响应三维数值分析研究[D].长沙:中南大学,2008.
[9]刘洁平.高层建筑土-结构相互作用地震反应分析研究[D].哈尔滨:中国地震局工程力学研究所,2009.
[10]朱永生.浅埋隧道地震动力响应数值分析及研究[D].成都:西南交通大学,2006.
[11]王国波.软土地铁车站结构三维地震响应计算理论与方法的研究[D].上海:同济大学,2007.
[12]杨林德,王国波,郑永来,等.地铁车站结构振动台试验及地震响应的三维数值模拟[J].岩石力学与工程学报,2007,26(8):1538-1545.
[13]GB 50011-2010,建筑抗震设计规范[S].
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