稻城亚丁机场航站楼钢结构设计要点

A Summary on Key Points in Structural Design of Daocheng Yading Airport Terminal

稻城亚丁机场航站楼主体呈飞碟状,建筑面积为8 796 m^2。以"伞"结构为灵感,航站楼竖向抗侧力体系采用钢管混凝土柱+斜交网格钢核心简+预应力拉索。楼面的承重体系采用12榀径向箱形钢梁+环向工字形钢梁。屋面结构采用改良型葵花形单层网壳。合理的结构布置及有效控制结构的整体扭转效应是该结构设计的要点。设计时根据结构的受力特点,分别在2层、3层及屋面层内圈设置箱形主环梁,约束楼面结构的扭转和变形,将整个楼面结构形成整体,将竖向力传导至斜交网格核心筒上。在2层和3层之间外圈处设置交叉支撑,减小了结构的整体扭转效应。

Daocheng Yading airport terminal is of 8 796 m^2 in building area and in a UFO shape. Based on an inspiration of umbrella structure,the terminal applies the combination of concrete filled steel tube（CFST） column,oblique grid steel core tube and prestressed cable as the main structural system to resist lateral force. Floor load-bearing system consists of 12 radial steel box beams and several H-shaped steel ring beams. Roof structure applies an improved sunflowershaped single-layer grid shell. This structural design are resonable and effective to control the overall structure torsion, According to mechanicl characteristics of structure, box-shaped ring beams are applied in the second, third and roof floors respectively which can resist torsion and control deformation of floor structures and make the entire floor structure work as one system. The main ring beams transfer the vertical force to the oblique grid steel core tube. Perimeter cross braces are applied between the second and third floors to reduce the overall torsion of the structure.