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利用FLAC3D对典型地铁车站接头结构进行三维数值模拟,并考虑不同方向的地震波激励下的地铁车站接头结构的响应。结果表明:水平向和竖直向地震波耦合输入对地铁车站接头结构的轴力和剪力有利,但对于弯矩是不利的;接头处区间隧道断面竖直向变形大于水平向变形;竖直向地震波加速度输入时结构的加速度放大系数远大于水平向;土—结构体系在地震作用下,端墙与中板连接处的动土压力幅值最大;而车站端墙的动/静比值从端墙顶部到底部从大到小有规律变化。
FLAC3D is used to simulate the joint structure of a typical metro station and to consider the response of metro station joints under earthquake excitation in different directions. The results show that the coupling of horizontal and vertical seismic waves is good for the axial force and shear of the metro station joint structure, but not for the bending moment. The vertical deformation of the cross-section of tunnel section is greater than the horizontal deformation. The vertical The acceleration amplifying coefficient of the structure when the seismic acceleration is input is far greater than that of the horizontal direction. Under the action of earthquake, the earth-structure system has the largest earth-moving pressure amplitude at the junction of the end wall and the middle plate, while the dynamic / From the bottom to the bottom of a regular change.