软土地铁车站结构及隧道的三维地震响应分析
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摘要
建立了软土地铁车站结构及相邻隧道的三维计算模型,研究了其三维地震响应规律,确定了结构的薄弱部位及地震荷载引起结构内力的增幅,分析了隧道对车站结构内力的影响。研究表明:①在距离车站结构端墙1.5倍车站结构横向宽度的横截面,可按平面应变问题分析;②车站结构受力较大的部位有:上柱上端与板结合处、底板跨边与侧墙结合处、底板中跨跨中及车站结构的前端墙;③地震荷载对柱端弯矩的影响最大;④区间隧道的存在削弱了车站结构前后端墙的整体抗震性能。研究成果可为地铁车站结构及隧道的抗震设计提供参考。
A three-dimensional calculation model of metro station structure and tunnels in soft soil is established;and their three-dimensional seismic responses are studied;and the unsubstantial parts of structures are determined;and the amplitude of inner forces caused by seismic waves are obtained;and the influence of tunnel on station structures is analyzed. Conclusions drawn from calculation results are as follows:(1) the section whose position is 1.5 times of width of station structure away from the end walls can be analyzed by the assumption of plane strain;(2) the disadvantageous parts of station structures include the above end of upper column,the conjoint part of sidewall and backplane,the mid-span of backplane and their conjuntion of front wall of station structure and tunnel;(3) seismic load has maximum effect on the moment of column;(4) the global aseismatic ability of front and behind walls of station structure will be weakened because of the existence of tunnel. The research results can provide references for seismic design of metro station structure and interzone tunnel.
A three-dimensional calculation model of metro station structure and tunnels in soft soil is established;and their three-dimensional seismic responses are studied;and the unsubstantial parts of structures are determined;and the amplitude of inner forces caused by seismic waves are obtained;and the influence of tunnel on station structures is analyzed. Conclusions drawn from calculation results are as follows:(1) the section whose position is 1.5 times of width of station structure away from the end walls can be analyzed by the assumption of plane strain;(2) the disadvantageous parts of station structures include the above end of upper column,the conjoint part of sidewall and backplane,the mid-span of backplane and their conjuntion of front wall of station structure and tunnel;(3) seismic load has maximum effect on the moment of column;(4) the global aseismatic ability of front and behind walls of station structure will be weakened because of the existence of tunnel. The research results can provide references for seismic design of metro station structure and interzone tunnel.
引文
[1]杨林德,李文艺,祝龙根,等.上海市地铁区间隧道和车站的地震灾害与防治对策研究[R].上海:同济大学上海防灾救灾研究所,1999.
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[10]周健,董鹏,池永.软土地下结构的地震土压力分析研究[J].岩土力学,2004,25(4):554-559.ZHOU Jian,DONG Peng,CHI Yong.Research on seismic soil pressure of underground structures in soft soils[J].Rock and Soil Mechanics,2004,25(4):554-559.
[11]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 of Dakai metro station caused by Kobe earthquake[J].Rock and Soil Mechanics,2008,29(1):245-250.
[12]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[博士学位论文D].上海:同济大学,2007.
[13]刘齐建.软土地铁建筑结构抗震设计计算理论的研究[博士学位论文D].上海:同济大学,2005.
[14]郑永来,周橙,黄炜,等.动态弹性模量的实验研究[J].河海大学学报(自然科学版),1998,26(2):31-35.ZHENG Yong-lai,ZHOU Cheng,HUANG Wei,et al.Experimental study on dynamic elastic modulus[J].Journal of Hohai University(Natural Sciences),1998,26(2):31-35.
[15]Itasca Consulting Group.Fast Lagrangian analysis of continua in3dimensions[R].Minneapolis:Itasca Consulting Group Inc.,2002.
[2]MIRSKE I,HERRMAN G H.Nonaxial symmetric motion of cylindrical shells[J].Journal of Acoustics Society of America,1957,29(7):1116-1123.
[3]NISHIYAMA S,MUROYA K.,HAYA H,et al.Seismic design of cut and cover tunnel based on damage analyses and experimental studies[J].Quarterly Report of RTRI(Railway Technical Research Institute),1999,40(3):158-164.
[4]TAMARI Y,TOWHATA I.Seismic soil-structure interaction of cross sections of flexible underground structures subjected to soil liquefaction[J].Soils and Foundations,2003,43(2):69-87.
[5]PAKBAZ M C.2-D analysis of circular tunnel against earthquake loading[J].Tunneling and Underground Space Technology,2005,20:411-417.
[6]CHE A L,IWATATE T,GE X R.Evaluation of dynamic soil-structure interaction and dynamic seismic soil pressures acting on it subjected to strong earthquake[J].Journal of Shanghai Jiaotong University(Science),2006,11(4):530-536.
[7]朱合华,陶履彬.盾构隧道衬砌结构受力分析的梁-弹簧系统模型[J].岩土力学,1998,19(2):26-32.ZHU He-hua,TAO Lü-bin.Study on two beam-spring models for the numerical analysis of segments in shield tunnel J].Rock and Soil Mechanics,1998,19(2):26-32.
[8]蒋通,苏亮.地震作用下盾构法隧道的弹塑性受力分析[J].岩土工程学报,1999,21(2):200-204.JIANG Tong,SU Liang.Elasto plastic stress analysis of shield tunnels under earthquake actions[J].Chinese Journal of Geotechnical Engineering,1999,21(2):200-204.
[9]毕继红,张鸿,邓芃.基于耦合分析法的地铁隧道抗震研究[J].岩土力学,2003,24(5):800-803.BI Ji-hong,ZHANG Hong,DENG Peng.Anti-seismic study on metro tunnel based on coupling numerical analysis method[J].Rock and Soil Mechanics,2003,24(5):800-803.
[10]周健,董鹏,池永.软土地下结构的地震土压力分析研究[J].岩土力学,2004,25(4):554-559.ZHOU Jian,DONG Peng,CHI Yong.Research on seismic soil pressure of underground structures in soft soils[J].Rock and Soil Mechanics,2004,25(4):554-559.
[11]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 of Dakai metro station caused by Kobe earthquake[J].Rock and Soil Mechanics,2008,29(1):245-250.
[12]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[博士学位论文D].上海:同济大学,2007.
[13]刘齐建.软土地铁建筑结构抗震设计计算理论的研究[博士学位论文D].上海:同济大学,2005.
[14]郑永来,周橙,黄炜,等.动态弹性模量的实验研究[J].河海大学学报(自然科学版),1998,26(2):31-35.ZHENG Yong-lai,ZHOU Cheng,HUANG Wei,et al.Experimental study on dynamic elastic modulus[J].Journal of Hohai University(Natural Sciences),1998,26(2):31-35.
[15]Itasca Consulting Group.Fast Lagrangian analysis of continua in3dimensions[R].Minneapolis:Itasca Consulting Group Inc.,2002.
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