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大型密贴交叉组合地铁车站地震响应分析

Keywords: 密贴交叉组合地铁车站,地震响应,整体性

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Abstract:

以北京地铁新建10号线公主坟站密贴下穿既有1号线公主坟站为工程背景,利用FLAC3D有限差分程序进行数值模拟分析,研究了大型密贴交叉组合地铁结构的地震响应特性.结果表明:在强震作用下,上下层车站结构会产生相互作用,引起一段距离的错位运动,故应增强上下层车站结构整体性,以提高抗震性能;相同横截面高度,中柱顶部与底部的地震响应均大于车站边墙结构;交叉部位与非交叉部位地震动特性具有大致相同的变化规律,非交叉部位结构各测点的相对水平位移、水平加速度均大于交叉部位结构,而不同位置的监测点水平应力变化率无明显规律.

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