仰拱形式对大跨断面隧道地震反应分析的影响  

Analysis on Influence of Invert Pattern on Seismic Response in the Tunnel with Long Span Section

作　　者：高峰[1] 韦华建[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《西部探矿工程》2012年第6期187-190,195,共5页West-China Exploration Engineering

基　　金：国家自然科学基金资助项目(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：以某大跨断面铁路车站隧道为研究对象,采用大型有限元分析软件ANSYS对隧道不同曲率的仰拱形式进行了地震反应分析。计算结果表明:大跨断面隧道的抗震性能较差;仰拱曲率变大,隧道结构受力减小,有利于隧道结构抗震;大跨断面隧道结构的薄弱环节主要出现在仰拱和右拱腰处。研究成果可作为大跨断面隧道抗震设计的参考依据。Taking a Iong span tunnel of a railway station as an inslanee, the paper analyses the seismic response of invert patternwith different curvature of tunnel by the finite element software ANSYS. The results indicates that the seismic behavior of tunnel with long span is rather poor, The structure stress of tunnel decreases with the curvature of the invert arch largen, which help to earthquake resistance of tunnel structures the weakness of long span tunnel is mainly at the top arch and the right arch side. The research could be considered as a reference for aseismic design of long span tunnel.

关 键 词：大跨断面隧道 仰拱 地震反应 有限元 一致粘弹性边界 

分 类 号：U25[交通运输工程—道路与铁道工程]