地震作用下浅埋隧道结构易损部位研究

Research on Vulnerable Part of Shallow-buried Tunnel Structure under Earthquake Action

文章以重庆市曾家岩大桥隧道工程北线浅埋隧道段抗震设防为研究背景,基于动力有限元数值方法,对浅埋隧道进行地震动力响应分析,包括加速度响应分析、位移响应分析及第一主应力和第三主应力响应分析。分析结果表明,地震作用下浅埋隧道边墙和拱脚部位为易损部位,这对浅埋隧道的抗震设计、施工等具有一定的指导意义。

Based on the seismic fortification of the shallow-buried tunnel section on the north line of Zengjiayan bridge tunnel engineering in Chongqing,the seismic dynamic response analysis of the shallow-buried tunnel is carried out based on the dynamicfinite element numerical method,including acceleration response analysis,displacement response analysis and the first and the third principal stress response analysis.The analysis results show that the side wall and arch foot of shallow-buried tunnel are vulnerable parts under the action of earthquake,which has certain guiding significance for the seismic design and construction of shallow-buried tunnel.