丰台火车站角楼和东站房结构设计与分析

Design and Analysis on the Corner Tower and the East Building of Fengtai Railway Station

丰台火车站是国内首例双层车场大型站房结构.由中央站房和东、西站房组成。中央站房角楼结构体系为钢筋混凝土框架剪力墙结构,东站房结构体系为钢管混凝土柱-钢梁框架体系。角楼和东站房结构体系受力明确、直接,与建筑形态的要求有机结合。中央站房角楼通过采用合理的抗震构造措施,应用BRB支撑,有效地解决了地上部分逐次收进导致的竖向刚度突变和整体扭转问题,并针对售票厅大跨度屋面进行了详细的舒适度分析。东站房通过设置滑移缝和其他构造措施,有效地控制了温度区段长度,并通过大震弹塑性分析,保证结构滑移支座的安全可靠。东站房采用桩基承台加转换梁基础形式.保证了下穿的地铁10号线和站房结构的安全性。

Fengtai Railway Station, which composed of the Central Station building, the East Station building, and the West Station building, is the first railway station with double-layer rail yards. The frame-shear wall system is adopted in the Corner buildings of the Central Station building while steel frame structure with concrete-filled column adopted in the East Station building. The structure systems are well combined with the architectural form with excellent mechanical performance. The abrupt change of vertical stiffness issue and the torsional response caused by the step back of the Corner buildings is solved with reasonable seismic structural measures and the application of buckling-restrained braces. Detailed comfort analysis is adopted on the long-span roof on the ticket lobby. The length of temperature segment of the East Station building is effectively limited by setting slip joints and other structural measures. The reliability of the slip bearing is guaranteed by elastic-plastic analysis of rare earthquake. The application of pile foundation with transfer beams ensures the safety the station building and the underneath Subway Line 10.