围护墙参与作用下[STHZ]3[ST][HT2”H]层地铁车站的结构抗震分析

为研究地下车站在围护墙参与下地震作用的影响，以某地下3层车站为例，采用工程设计可操作性较好的反应位移法，通过简化的二维平面模型分析地震作用下带围护墙地下车站结构的响应特征。主要研究内容和结论如下： 1）结构角部较大弯矩由对角分布转变为同侧分布且数值增大，侧墙剪力有所减小，板的轴力互有增减； 2）指出地震工况与静力作用下结构受力的异同，负1层侧墙支座弯矩明显增大，板的剪力减少，而墙的剪力则明显增加； 3）给出同类型地下车站在地震作用下结构方案的设计建议，包括关注侧墙-顶板支座、侧墙跨中的配筋率，重视侧墙的抗剪截面拟定。

Structural Seismic Analysis on a 3-storey Metro Station with Retaining Walls

The seismic effect of a 3-storey underground Metro station with retaining walls is studied by means of response displacement method.The response behavior of the underground Metro station with retaining walls is analyzed by means of simplified 2D plane model.The main study items and conclusions drawn are as follows：1 ）The large bending moment at the corners of the structure is converted from diagonal distribution into distribution on the same side,the value of the bending moment increases,the shear force of the side wall reduces and the axial force of the slab has some increase and decrease;2）The difference between the loading condition in the case of earthquake and that under the static load is expounded,the bending moment of the support of the side walls of the first underground floor increases significantly,the shear force of the slab reduces and the shear force of the side walls increases significantly;3 ）Suggestions,including paying attention to the side wall and the top slab support,paying attention to the reinforcement bar ratio of the side wall and paying more attention to the determination of the anti-shear cross-section of the side walls,are made for the structural design of the underground Metro stations of the same type under seismic action.