地震区棚洞合理结构形式的研究
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摘要
以傍山隧道为研究对象,计算了地震动作用下不同结构形式棚洞的主应力和位移。采用大型有限元软件AN-SYS对棚洞进行了地震反应分析,根据D-P屈服准则,利用静-动力统一人工边界建立边界条件。研究表明:半拱斜柱式棚洞比半拱直柱式棚洞的抗震性能更优越;拱式棚洞比柱式棚洞抗震性能更好;柱式棚洞柱与横梁的连接形式不同而应力分布规律发生变化;地震时,洞顶回填土与边坡的交界面可能产生滑动。
Taking the tunnel adjacent to the mountain as an object,the principal stress and displacement of different shed-tunnel structure were calculated under seismic loading.The seismic response of shed-tunnel was analyzed by the finite element program ANSYS,the Drucker-Prager yield criterion was used as a criterion and the static-dynamic unitized artificial boundary as boundary condition.The results showed that the aseismatic capability of the semi-arch shed-tunnel with oblique column was superior than that with straight column;the aseismatic capability of the arch-style was better than that of the column-style shed-tunnel;the distribution rule of stress was changed as a result of different connection way of cross beam and column-style shed-tunnel;interface of slope and filling layer may slip in the earthquake.
Taking the tunnel adjacent to the mountain as an object,the principal stress and displacement of different shed-tunnel structure were calculated under seismic loading.The seismic response of shed-tunnel was analyzed by the finite element program ANSYS,the Drucker-Prager yield criterion was used as a criterion and the static-dynamic unitized artificial boundary as boundary condition.The results showed that the aseismatic capability of the semi-arch shed-tunnel with oblique column was superior than that with straight column;the aseismatic capability of the arch-style was better than that of the column-style shed-tunnel;the distribution rule of stress was changed as a result of different connection way of cross beam and column-style shed-tunnel;interface of slope and filling layer may slip in the earthquake.
引文
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[7]郭军,王明年,田尚志.高烈度地震区公路隧道明洞抗震计算分析[J].岩土工程学报,2007,29(11):1734-1736.Guo Jun,Wang Mingnian,Tian Shangzhi.A seismatic analysis onopen tunnels of freeway in seismic region with strong motion[J].Chi-nese Journal of Geotechnical Engineering,2007,29(11):1734-1736.
[8]刘晶波,李彬.三维黏弹性静-动力统一人工边界[J].中国科学:E辑,2005,35(9):966-980.Liu Jingbo,Li Bin.A unified viscous-spring artificial boundary for3-D static and dynamic applications[J].Science in China:ser.E,2005,35(9):966-980.
[9]JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004.JTG D 70—2004 Code for Design of Road Tunnel[S].Beijing:China Communications Press,2004
[2]高峰,王飞,伍臣宇.棚洞与隧道洞口段的地震反应分析[J].重庆交通大学学报:自然科学版,2011,30(2):1237-1240,1245.Gao Feng,Wang Fei,Wu Chenyu.Anti-seismic analysis on con-nect the form of shed-tunnel in tunnel outlet[J].Journal ofChongqing Jiaotong University:Natural Science,2011,30(2):2137-1240,1245.
[3]杨其新,关宝树.落石冲击力计算方法的试验研究[J].铁道学报,1996,18(1):101-106.Yang Qixin,Guan Baoshu.Test and research on calculating meth-od of falling stone impulsive force[J].Journal of the China Rail-way Society,1996,18(1):101-106.
[4]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.3-D seismic responses study on some prob-lems in tunnel[J].Chinese Journal of Geotechnical Engineering,1998,20(4):48-53.
[5]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 shockabsorption Measures in tunnel[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(2):222-229.
[6]陈赤坤.地震区遮拦危岩落石的框架棚洞设计[J].科学技术通讯,2003(120):13-17.Chen Chikun.Shed-tunnel frame design on block dangerous rockunder seismic loading[J].Scientific and Technical Communica-tions,2003(120):13-17.
[7]郭军,王明年,田尚志.高烈度地震区公路隧道明洞抗震计算分析[J].岩土工程学报,2007,29(11):1734-1736.Guo Jun,Wang Mingnian,Tian Shangzhi.A seismatic analysis onopen tunnels of freeway in seismic region with strong motion[J].Chi-nese Journal of Geotechnical Engineering,2007,29(11):1734-1736.
[8]刘晶波,李彬.三维黏弹性静-动力统一人工边界[J].中国科学:E辑,2005,35(9):966-980.Liu Jingbo,Li Bin.A unified viscous-spring artificial boundary for3-D static and dynamic applications[J].Science in China:ser.E,2005,35(9):966-980.
[9]JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004.JTG D 70—2004 Code for Design of Road Tunnel[S].Beijing:China Communications Press,2004
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