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基于ABAQUS软件研发的显式有限元并行计算集群平台,建立地铁双层交叉隧道结构的三维精细化有限元分析模型,研究了近场强地震动作用下地铁双层交叉隧道的三维非线性地震反应特性,并与浅埋/深埋单层隧道的地震反应特性进行了比较,结果表明:双层隧道的相互作用效应对上、下层隧道顶、底部之间的相对水平位移差具有放大作用;对上、下层隧道的地震应力反应有减小作用;双层隧道上、下层左侧的地震应力反应大于右侧的地震应力反应,隧道拱肩和拱腰处的应力反应明显大于其他部位,拱肩为隧道结构的最危险部位;双层隧道下层顶、底部的峰值加速度反应大于上层顶、底部的峰值加速度反应;双层隧道相互作用效应对上、下层隧道地震反应的影响与双层隧道的交叉形式和基岩输入的近场强地震动特性有关。
Based on the explicit finite element parallel computing cluster platform developed by ABAQUS software, a three-dimensional finite element analysis model of subway double-decked cross-section tunnel was established. The three-dimensional nonlinear seismic response of double-decked subway tunnel under near- The results show that the interaction effect of double-layer tunnel can amplify the relative horizontal displacement difference between the top and bottom tunnels. The seismic stress response of the upper and lower tunnels can be reduced. The seismic stress response of the upper and lower strata of the double tunnel is greater than the seismic stress response of the right tunnel. The stress response of the tunnel arch and arch waist is obviously greater than that of the other sites. Which is the most dangerous part of the tunnel structure. The peak acceleration responses at the top and bottom of the double-decked tunnel are greater than those at the top and bottom of the upper tunnel. The effect of the interaction between the two tunnels on the seismic response of the upper and lower tunnels is similar to that of the double tunnel The form is related to the near-field strong ground motion characteristics of bedrock input.