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研究地铁车站结构在地震作用下的变形,对地铁的建设和安全运营有着重要的现实意义。本文进行了北京地区土层中典型地铁车站结构的振动台试验,并使用FLAC2D对试验进行模拟分析,得到了在地震作用下地铁车站结构的变形响应规律。结果表明:地铁结构的变形峰值随地震强度的增加而增加;结构中柱的峰值应变和峰值挠度曲线曲率,两端大、中间小;侧墙峰值挠度曲线的各点曲率为常数,这是因为侧墙与顶底板组成的箱形结构整体刚度大,难以发生破坏;中柱底端应变呈正负循环变化,侧墙的应变曲线与受冲击荷载的变形曲线相似。
Studying the deformation of metro station structure under earthquake action has important practical significance for the construction and safe operation of metro. In this paper, the shaking table test of the typical metro station structure in the soil of Beijing area is carried out. The experiment is simulated by FLAC2D, and the deformation response law of subway station structure under earthquake action is obtained. The results show that the deformation peak of subway structure increases with the increase of earthquake intensity. The peak strain and the peak deflection curve curvature of the column in the structure are large at both ends and small in the middle. The curvature at each point in the peak deflection curve of the side wall is constant because The box-shaped structure composed of the side wall and the top floor has a large overall stiffness and is hard to be damaged. The bottom end of the center pillar changes in a positive and a negative cycle. The strain curve of the side wall is similar to the deformation curve of the impact load.