地震区棚洞合理结构形式的研究  

Study on Rational Structure of Shed-Tunnel under Seismic Loading

作　　者：伍臣宇 高峰[2] 

机构地区：[1]中煤科工集团重庆设计研究院市政与建筑二所,重庆400016 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2013年第1期27-31,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50678077);重庆市自然科学基金项目(CSTC;2008BB6066);重庆市教委科学技术研究项目(KJ090403)

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.

关 键 词：棚洞 地震 有限元 静-动力统一人工边界 合理结构 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]