关山隧道断层破碎带三维有限元地震动力响应
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摘要
以华庄公路关山隧道为研究对象,通过建立大型三维有限元模型,采用一种人工构成的短时间正弦扫描Johnson/Epstein地震记录进行地震动力分析。该记录具有在较短时程内包含较大的实际地震频率范围的特点,从而减小计算分析的持续时间。通过对3种工况(不设置抗震缝、设置2条和3条抗震缝)计算,结果表明:关山隧道衬砌结构的动力响应以横向的受力特征为主,拱顶处横向加速度和横向位移最大,仰拱及拱底处横向加速度峰值和横向位移峰值较小,设置3条抗震缝时的围岩体位移和应力明显优于其他工况,该设计方案能满足8度区抗震要求。
Taken Guanshan tunnel of Huazhuang highway as the research subject,the seismic dynamic response characteristic was analyzed by using large-scale 3D finite element model and an artificial synthesized short-time sinusoid scan wave,Johnson/Epstein,which has the character of involving more extensive frequency of seismic wave so as to decreasing computing time.The calculation result of three working conditions(no aseismatic joint,two joints and three joints) demonstrates that(1) the principal mechanic characteristic of the dynamic response of Guanshan tunnel lining is transverse,the maximum transverse acceleration and displacement is distributed in vault,while the peak values of transverse acceleration and displacement are less in inverted arch and arch bottom;(2) setting up three joints for seismic resistance is prior and can satisfy the design requirements in the seismic region with intensity 8.
Taken Guanshan tunnel of Huazhuang highway as the research subject,the seismic dynamic response characteristic was analyzed by using large-scale 3D finite element model and an artificial synthesized short-time sinusoid scan wave,Johnson/Epstein,which has the character of involving more extensive frequency of seismic wave so as to decreasing computing time.The calculation result of three working conditions(no aseismatic joint,two joints and three joints) demonstrates that(1) the principal mechanic characteristic of the dynamic response of Guanshan tunnel lining is transverse,the maximum transverse acceleration and displacement is distributed in vault,while the peak values of transverse acceleration and displacement are less in inverted arch and arch bottom;(2) setting up three joints for seismic resistance is prior and can satisfy the design requirements in the seismic region with intensity 8.
引文
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[14]严松宏,梁波,高波.地下结构纵向抗震动力可靠度分析[J].岩石力学与工程学报,2005,24(1):73-78.YANSonghong,LIANG Bo,GAO Bo.Dynamic Analysisof Longitudinal Aseismic Reliability of UndergroundStructures[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(1):73-78.
[2]EISENSTEIR Z D.Large Undersea Tunnels and theprogress of Tunnel Lining Technology[J].Tunnel Lingand Underground Space Technology,1994,9(3):283-292.
[3]李德武.断层破碎带隧道衬砌受力特性研究[J].岩石力学与工程学报,2005,24(7):1274-1275.LI Dewu.Research on the Stress Features of Tunnel Lining inthe Fault-rupture Zone[J.]Chinese Journal of RockMechanics and Engineering,2005,24(7):1274-1275.
[4]姜忻良,宋丽梅.软土地层中地下隧道结构地震反应分析[J].地震工程与工程振动,1999,19(1):65-69.JIANG Xinliang,SONG Limei.Seismic ResponseAnalysis of Underground Tunnel in Soft Soil[J].Earthquake Engineering And Engineering Vibration,1999,19(1):65-69.
[5]熊良宵.活断层地区隧道抗震问题的数值模拟研究[D].成都:成都理工大学,2006.XIONG Liangxiao.Anti-seismic Numerical SimulationStudy of Tunnel in Active Fault Areas[D].Chengdu:Chengdu University of Technology,2006.
[6]李育枢.山岭隧道地震动力响应及减震措施研究[D].上海:同济大学,2006.LI Yushu.Study on Earthquake Responses and Vibration-absorption Measures for Mountain Tunnel[D].Shanghai:Tongji University,2006.
[7]HASHASH Y,HOOK J J,SCHMIDT B,et al.SeismicDesign and Analysis of Underground Structures[J].Tunnelling and Underground Space Technology,2001,16(4):247-293.
[8]高峰,李德武.隧道三维地震反应分析若干问题的研究[J].岩土工程学报,1998,20(4):48-53GAO Feng,LI Dewu.A study on Some ProblemsConcerning 3D Analysis of Seismic Responses of Tunnels[J].Chinese Journal of Geotechnical Engineering,1998,20(4):48-53.
[9]黄胜,陈卫忠,杨建平,等.地下工程地震动力响应及抗震研究[J].岩石力学与工程学报,2009,28(3):483-490.HUANG Sheng,CHEN Weizhong,YANG Jianping,etal.Research on Earthquake-induced Dynamic Responsesand Aseismic Measures for Underground Engineering[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):483-490.
[10]伍国军,陈卫忠,刘豆豆,等.基于连续介质模型的隧道衬砌结构可靠性研究[J].岩土力学,2006,27(s1):359-363.WU Guojun,CHEN Weizhong,LIU Doudou,et al.Reliability Analysis of Tunnel Lining Based on ContinuumModel[J].Rock and soil mechanics,2006,27(s1):359-363.
[11]甘肃省交通规划勘察设计院有限责任公司.华亭至庄浪二级公路两阶段施工图设计[R].兰州:甘肃省交通规划勘察设计院有限责任公司,2004.Gansu Provincial Transportation Planning,Survey andDesign Institute Co.Ltd.Huating to Zhuanglang Second-class Highway Construction Documents Design in TwoStages[R].Lanzhou:Gansu Provincial TransportationPlanning,Survey and Design Institute Co.Ltd,2004.
[12]韩友续、李德武、谢永利,等.关山隧道断层破碎带衬砌受力特性及承压水处置技术研究[R].兰州:兰州交通大学,2007.HAN Youxu,LI Dewu,XIE Yongli.Research of LiningMechanical Behavior in Fault Zone and Confined WaterDisposal Technology of Guanshan Tunnel[R].Lanzhou:Lanzhou Jiaotong University,2004.
[13]阎盛海.地下结构抗震[M].大连:大连理工大学出版社,1989.YAN Shenghai.Earthquake Resistance of UndergroundStructures[M].Dalian:Dalian University of TechnologyPress,1989.
[14]严松宏,梁波,高波.地下结构纵向抗震动力可靠度分析[J].岩石力学与工程学报,2005,24(1):73-78.YANSonghong,LIANG Bo,GAO Bo.Dynamic Analysisof Longitudinal Aseismic Reliability of UndergroundStructures[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(1):73-78.
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