不同坡度条件下岩溶区隧道的地震动力响应

Seismic Response of Karst Area Tunnels under Different Slope Conditions

虽然相比于地面构筑物,地下结构具有良好的抗震性。但近年来研究发现,岩溶地质条件下隧道结构仍会出现严重的震害,且震害的程度也会随隧道所处地形差异而不同。为研究其地震动力特性,借助ABAQUS有限元软件,以福建某一隧道为依托,基于黏弹性人工边界建立二维有限元计算模型,分析了不同坡度下岩溶区隧道的地震动力响应,得到了衬砌结构各监测点的应力、位移以及围岩最大塑性区变化情况。

Compared with structures that above the ground,the underground structures have a better seismic resistance.However,in recent years,it was proved that,under the seismic conditions,tunnel structures in karst geological conditions might still potentially have serious damage.Further,the degree of earthquake induced damage might also vary with the topography adjacent to the tunnel structure.The seismic response of a tunnel in karst terrain in Fujian was numerically simulated by using the two-dimensional finite element analysis using a commercial software ABAQUS.The response of tunnels under seismic conditions with different slope conditions are evaluated and the stresses displacements are monitoring points are presented.