“站桥合一”工程中地铁车站的墙-柱荷载分配计算

Wall-Column Load Distribution Calculation in Subway Station Structures in Station-Bridge Co-Construction Project

在轨道交通“站桥合一”的工程建设中,桥梁荷载在地铁车站结构的侧墙和框架柱上的分配分析是设计计算的一个关键内容。对软土地区“站桥合一”工程中典型的两层双柱三跨矩形框架地铁车站的墙-柱荷载分配分析方法进行了研究,提出了一个适用于软土地区的地铁车站墙-柱荷载分配分析的简化力学模型,给出了墙-柱荷载分配系数B(柱荷载与桥梁荷载的比值)的解析解。采用该解析解,可以确定不同的桥台刚度、地铁车站刚度和桥墩间距下,地铁车站的侧墙与框架柱的荷载分配。并通过有限元方法验证了该简化分析法的可靠性。

In rail transit,the analysis of the bridge load distribution on the side walls and columns in subway station structures is a key factor in the design of station-bridge co-construction projects.In this paper,a simplified analysis model of the wall-column load distribution for a typical two-story,two-column,three-span rectangular frame subway station in a station-bridge co-construction project is investigated,and an analytical solution for the load distribution factor B(ratio of column load to bridge load)is presented.Using the proposed solution,the load distribution between the side wall and the column can be determined according to the stiffness of the subway station and the pier spacing of the bridge.The reliability of the proposed method is also verified by the finite element method.