广州南站无站台柱雨棚钢结构屋盖的设计与施工

Design and construction of the canopy roof system in Guangzhou South Railway Station

广州南站在主站房南、北两侧对称布置两个无站台柱雨棚,单侧无站台柱雨棚屋盖平面尺寸为421.8 m×189.6 m,雨棚顶由6个连续跨拱壳构成芭蕉叶形.雨棚钢结构由索拱、桁架、异形分叉柱等组成,它采用了拉索与拱身同向弯曲的新型索拱,造型美观、稳定、抗风性能好.索拱下弦拉索的预应力和拱脚节点是其设计的关键与难点.文章从设计与施工配合的角度,介绍了广州南站雨棚钢屋盖的设计施工的重点、难点,分析了预应力索拱的工作原理.其设计与施工,对大跨度空间结构设计及施工具有很好的借鉴价值.

It was arranged canopy structures on both the north and south side of the main station building in Guangzhou South Railway Station （GSRS）. Each canopy＇s roof has a plane area of 421.8 m × 189. 6 m. There were six continuous cross arch shells that formed the canopy in a shape of the Japanese banana＇s leaf. These two canopy structures of GSRS were consisted of cable-arc, truss and forked special-shaped column. A new type of cable-arc structure had been used, in which the inhaul cable and the body of the arch shell were bended in the same direction. It had a graceful shape, good stability and good wind-re- sistant performance. The most difficult and important points of the design and construction wsa its pre- stress and arch join node. The construction and design process of the canopy structure were introduced in this paper, and an analysis on the working principle of the pre-stress of cable-arch structure was done. It had a valuable reference for those who＇s going to design and construct a big space structure.