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（北京市建筑設計研究院，北京 100045）

［摘要］廣州新客站主站房屋蓋平面尺寸468.8m×222.0m，投影面積10.4萬m²，空間關系復雜，采用了新型預應力索拱、單層索殼、三向張弦梁等結(jié)構(gòu)體系。詳細介紹了屋蓋結(jié)構(gòu)的結(jié)構(gòu)體系、構(gòu)件截面、材質(zhì)、設計荷載和設計標準，以及關鍵節(jié)點設計；研究了預應力優(yōu)化設計，使截面利用率和結(jié)構(gòu)對支座的作用達到了最優(yōu)的效果；研究了屋蓋結(jié)構(gòu)的靜力動力性能和抗震性能；考慮了不均勻升溫對屋蓋受力性能的影響。

［關鍵詞］火車站站房；預應力空間結(jié)構(gòu)；索拱；索殼；預應力；不均勻升溫；節(jié)點設計

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.