文章摘要

文章信息/Info

Author(s):: HUANG Min¹; 2; GAO Bo¹; WEI Lai¹; (1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)(2.Department of Civil Engineering,Technology Institute of Henan,Zhengzhou 454191,Henan,China)

Keywords:: high earthquake intensity area; entrance of tunnel; seismic response

摘要:: 在地震高烈度区,公路隧道有可能遭受严重震害,尤其是洞口段,为抗震薄弱区。采用FLAC3D软件,从土—结构相互作用模型出发,运用数值分析方法对隧道洞口段进行了动力时程分析。分析认为,在抗震设计中应重视隧道仰拱以及墙脚处于不利位置的情况,加强配筋; 在施工中要充分重视围岩的作用,使其能与结构共同作用,减轻结构的损害。

Abstract:: In high earthquake intensity area,strong seismic motion may cause the ruin of highway tunnel,especially the entrance of tunnel,the weakest part of the tunnel.Based on the soil-structure interaction model,we used FLAC3D soft and numerical analysis method to analyze the dynamic time-response of tunnel entrance.The analysis shows that the arch and wall foot are lied in unfavorable locations,need reinforcing steel bar in seismic design,and the function of wall rock should be paid more attention to in construction,since it can reduce the damage of structure when it acts with structure together.