地下工程地震动力响应及抗震研究
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摘要
应用改进的Newmark隐式积分法,采用无限元动力人工边界,研究西藏扎墨公路高烈度地震区嘎隆拉隧道地震动力响应,分析隧道抗震层的减震机制,数值模拟橡胶和泡沫混凝土两类材料抗震层的减震效果。计算结果表明:抗震层虽不能从根本上改变隧道的动力响应,但由于它本身的隔震缓冲作用,能够对衬砌起到较好的隔震效果;两类抗震材料隔震效果相差不大,但考虑到耐久性和经济性,推荐采用泡沫混凝土作隔震材料。研究成果对高烈度地震区地下工程稳定性分析具有一定的借鉴意义。
Based on improved Newmark′s implicit integration methodt,he earthquake-induced dynamic responses of Galongla Tunnel along Zhamo Highway in Tibet are studied using infinite element dynamic artificial boundary technique;and aseismic mechanism of seismic isolation layer is analysed.Furthermore,the shock absorption effects of two kinds of seismic isolation layers,which are made of rubber and foam concrete respectively,are studied and compared those with numerical method.The results show that better shock absorption effects can be achieved because of the good isolation and cushioning effects of the seismic isolation layer despite that the dynamic response of the tunnel cannot be changed essentially.It also can be seen that there are small differences in shock absorption effects between two kinds of seismic isolation materials;however,foam concrete is recommended because of its durability and economy.Results of this research can provide certain references to stability analysis of underground engineering in highly seismic regions.
Based on improved Newmark′s implicit integration methodt,he earthquake-induced dynamic responses of Galongla Tunnel along Zhamo Highway in Tibet are studied using infinite element dynamic artificial boundary technique;and aseismic mechanism of seismic isolation layer is analysed.Furthermore,the shock absorption effects of two kinds of seismic isolation layers,which are made of rubber and foam concrete respectively,are studied and compared those with numerical method.The results show that better shock absorption effects can be achieved because of the good isolation and cushioning effects of the seismic isolation layer despite that the dynamic response of the tunnel cannot be changed essentially.It also can be seen that there are small differences in shock absorption effects between two kinds of seismic isolation materials;however,foam concrete is recommended because of its durability and economy.Results of this research can provide certain references to stability analysis of underground engineering in highly seismic regions.
引文
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[11]王志杰,高波,关宝树.围岩–隧道衬砌结构体系的减震研究[J].西南交通大学学报,1996,31(6):590–594.(WANG Zhijie,GAO Bo,GUAN Baoshu.Research of isolation of rock liner structure systems[J].Journal of Southwest Jiaotong University,1996,31(6):590–594.(in Chinese))
[12]董永香,黄晨光,段祝平.多层介质对应力波传播特性影响分析[J].高压物理学报,2005,19(1):59–65.(DONG Yongxiang,HUANG Chenguang,DUAN Zhuping.Analysis of the influence of multi-layered media on stress wave propagation[J].Chinese Journal of High Pressure Physics,2005,19(1):59–65.(in Chinese))
[13]王代华,刘殿书,杜玉兰,等.含泡沫吸能层防护结构爆炸能量分布的数值模拟研究[J].爆破与冲击,2006,26(6):562–567.(WANG Daihua,LIU Dianshu,DU Yulan,et al.Nunmerical simulation of anti-blasting mechanism and energy distribution of composite protective structure with foam concrete[J].Explosion and Shock Waves,2006,26(6):562–567.(in Chinese))
[14]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):48–53.(GAO Feng,LI Dewu.A study on some problems concerning 3D analysis of seismic response of tunnels[J].Chinese Journal of Geotechnical Engineering,1998,20(4):48–53.(in Chinese))
[2]中华人民共和国行业标准编写组.JTJ004–89公路工程抗震设计规范[S].北京:人民交通出版社,1989.(The Professional Standards Compilation Group of People′s Republic of China.JTJ004–89 Specifications of earthquake resistant design for highway engineering[S].Beijing:China Communications Press,1989.(in Chinese))
[3]孙铁成,高波,叶朝良.地下结构抗震减震措施与研究方法探讨[J].现代隧道技术,2007,44(3):1–5,10.(SUN Tiecheng,GAO Bo,YE Zhaoliang.Discussion on anti-seismic and seismic-relieving measures and corresponding research methods for underground structures[J].Modern Tunnelling Technology,2007,44(3):1–5,10.(in Chinese))
[4]李育枢.山岭隧道地震动力响应及减震措施研究[博士学位论文][D].上海:同济大学,2002.(LI Yushu.Study on earthquake responses and vibration-absorption measures for mountain tunnel[Ph.D.Thesis][D].Shanghai:Tongji University,2002.(in Chinese))
[5]Hibbitt,Karlsson and Sorensen,Inc..ABAQUS theory manual and analysis user′s manual[R].Pawtucket,USA:Hibbitt,Karlsson and Sorensen,Inc.,2002.
[6]高峰,石玉成,严松宏,等.隧道的两种减震措施研究[J].岩石力学与工程学报,2005,24(2):222–229.(GAO Feng,SHI Yucheng,YAN Songhong,et al.Study of two shock absorption measures in tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(2):222–229.(in Chinese))
[7]LYSMER J,KULEMEYER R L.Finite dynamic model for infinite media[J].Journal of the Engineering Mechanics Division,ASCE,1969,95(4):859–877.
[8]CLAYTON R,ENGQUIST B.Absorbing boundary conditions for acoustic and elastic wave equations[J].Bulletin of the Seismological Society of America,1977,67(6):1 529–1 540.
[9]廖振鹏,黄孔亮,杨柏坡,等.暂态波透射边界[J].中国科学(A辑),1984,(6):556–564.(LIAO Zhenpeng,HUANG Kongliang,YANG Baipo,et al.Transmitting boundary of transient wave[J].Science in China(Series A),1984,(6):556–564.(in Chinese))
[10]吴鸿庆,任侠.结构有限元分析[M].北京:中国铁道出版社,2000.(WU Hongqing,REN Xia.Finite element analysis for structures[M].Beijing:China Railway Publishing House,2000.(in Chinese))
[11]王志杰,高波,关宝树.围岩–隧道衬砌结构体系的减震研究[J].西南交通大学学报,1996,31(6):590–594.(WANG Zhijie,GAO Bo,GUAN Baoshu.Research of isolation of rock liner structure systems[J].Journal of Southwest Jiaotong University,1996,31(6):590–594.(in Chinese))
[12]董永香,黄晨光,段祝平.多层介质对应力波传播特性影响分析[J].高压物理学报,2005,19(1):59–65.(DONG Yongxiang,HUANG Chenguang,DUAN Zhuping.Analysis of the influence of multi-layered media on stress wave propagation[J].Chinese Journal of High Pressure Physics,2005,19(1):59–65.(in Chinese))
[13]王代华,刘殿书,杜玉兰,等.含泡沫吸能层防护结构爆炸能量分布的数值模拟研究[J].爆破与冲击,2006,26(6):562–567.(WANG Daihua,LIU Dianshu,DU Yulan,et al.Nunmerical simulation of anti-blasting mechanism and energy distribution of composite protective structure with foam concrete[J].Explosion and Shock Waves,2006,26(6):562–567.(in Chinese))
[14]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):48–53.(GAO Feng,LI Dewu.A study on some problems concerning 3D analysis of seismic response of tunnels[J].Chinese Journal of Geotechnical Engineering,1998,20(4):48–53.(in Chinese))
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