（北京市建筑设计研究院，北京 100045）

［摘要］广州新客站主站房屋盖平面尺寸468.8m×222.0m，投影面积10.4万m²，空间关系复杂，采用了新型预应力索拱、单层索壳、三向张弦梁等结构体系。详细介绍了屋盖结构的结构体系、构件截面、材质、设计荷载和设计标准，以及关键节点设计；研究了预应力优化设计，使截面利用率和结构对支座的作用达到了最优的效果；研究了屋盖结构的静力动力性能和抗震性能；考虑了不均匀升温对屋盖受力性能的影响。

［关键词］火车站站房；预应力空间结构；索拱；索壳；预应力；不均匀升温；节点设计

Steel structural design on the roof of New Guangzhou Railway Station

Zhen Wei, Sheng Ping, Ke Changhua, Qin Kai, Zhu Zhongyi(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The roof of New Guangzhou Railway Station has a 468.8m×222.0m projection dimension. The form and structure system are complicated. Prestressed cable-arc structure, cable-shell structure and tri-directional truss-string spatial structure are applied. The structure system, member section, material, design load and design standard are introduced, as well as the critical joints of the roof. Optimization is used on the prestress design, section utilization and support reaction design. The static and dynamic performance and the aseismic capability are studied. The influence of asymmetrical temperature load on the structure performance of the roof is studied.