侧墙开洞拱形地铁车站结构三维地震响应分析  

A 3-D Seismic Response Analysis of an Arched Subway Station Structure with Side Wall Openings

作　　者：李睿周 LI Ruizhou(The Municipal Engineering Co.Ltd.of the 18th Bureau Group of China Railway,Tianjin 300222,China)

机构地区：[1]中铁十八局集团市政工程有限公司

出　　处：《国防交通工程与技术》2020年第2期26-29,共4页Traffic Engineering and Technology for National Defence

摘　　要：基于数值模拟的方法,建立了土-拱形地铁车站侧墙开洞接通道相互作用的三维数值分析模型,研究了其在水平地震作用下的动力响应规律。结果表明,开洞部位结构边墙或中柱的加速度峰值随着开洞数量的增加而减小,而下边墙的加速度略大于上边墙的加速度;开口部位结构侧墙的最大压应力随开洞数量的增加逐渐增加、弯矩幅值却逐渐减小,而中柱的最大压应力和弯矩幅值均逐渐增加;开洞部位的加速度峰值、相对位移峰值及应力或内力幅值均与侧墙开洞形式有关,正方形开洞工况下的加速度相对最大、横矩形次之、圆形最小;相同开洞面积时,侧墙横向矩形开洞引起的地震反应比竖矩形的略大,开洞角部是抗震设计的薄弱环节。Upon the basis of the numerical simulation methods, a 3-D numerical simulation analysis model for the interaction of an earth arch-shaped subway station structure with side wall openings connected with passages is established, with the law of its dynamic response under the action of a horizontal earthquake studied. The result of our research shows that the peak acceleration of the side wall or the central column in the structure increases with the increase in the number of the openings, and the acceleration of the lower side wall is slightly greater than that of the upper side wall;with the increase in the number of holes, the maximum principal stress of the side wall of the structure at the opening positions increases gradually, while the amplitude of the bending moment decreases gradually, but both the maximum compression stress and the amplitude of the bending moment of the central column increase gradually. The acceleration peak, the relative displacement peak and stress or the amplitude of the internal force of the opening are related to the form of the opening in the side wall. In the circumstance of the square opening, the peak acceleration is relatively maximum, the peak acceleration of the transverse rectangular opening is smaller, and that of the circular opening is the smallest;when the openings are the same in area, the seismic response caused by the transverse rectangular opening in the side wall is slightly greater than that of the vertical rectangular opening, and the opening corner is the weak link of the seismic design.

关 键 词：侧墙开洞 开洞方案 地震反应 拱形车站 

分 类 号：U231.4[交通运输工程—道路与铁道工程]