Seismic Response Analysis of Large Closely-attached Intersecting Combination of Subway Station
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摘要: 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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关键词:
- 密贴交叉组合地铁车站 /
- 地震响应 /
- 整体性
Abstract: Taking the Beijing Subway line 10 Gongzhufen station closely-attached intersecting the existing Line 1 Gongzhufen station as engineering background,the finite difference procedure FLAC3D was used to simulate the seismic response of large closely-attached intersecting combination of subway structure.Resultsshow that,under the action of strong earthquake,the upper and lower station structure interaction cause some distance from the dislocation movement,station should strengthen its integrity to improve the seismic performance; in the same cross section height,the earthquake response of the top and bottom of interior column are greater than side-wall structure; the cross-site and uncross-site have roughly the same variation,and the relative horizontal displacement and acceleration of each measuring point of the noncross parts are greater than the cross-site structure,but the monitoring points stress change-rate of different locations has no obvious regularity. -
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