吉林省速滑馆悬索-拱屋盖结构设计

吉林省速滑馆是2007年第六届亚冬会的主场馆,其屋盖是一个预张力悬索-拱体系,悬索跨度近95m,悬索与拱梁之间设置“之”字状的吊索。悬索水平拉力的平衡体系由桅杆外侧的背拉索、接地索、水平撑杆、斜撑杆或屋顶锚固索组成。这种组合结合了悬索结构和拱结构的优点,悬索增加了拱的平面内稳定性能,同时减小了拱脚水平推力;拱提高了悬索的面内刚度,有效减小荷载作用下特别是非对称荷载作用下的结构变形。介绍了该体系的结构特点、初始预张力确定、动力特性、荷载作用下的力学性能,以及主要节点构造等。

Suspension Cable-arch Roof Structure Design of Jilin Speed-skating Gymnasium

The roof of Jilin speek-skating gymnasium is a pre-tension cable-arch system with the suspension cable spanning approximately 95 meters,so far it is the longest in buildings nationwide.A zigzag hanger is distributed between the suspension cable and the arch beam.The horizontal force of the suspension cable is balanced by the baokstay,anchored cable,horizontal brace,tilted brace or anchored cable on the roof at the extrnal side of the mast.The combination integrates the strengths of both structures.The suspension cable enhances the stability of arch in plane and reduces the horizontal push of arch foot.The arch improves the vertical rigidity of suspension cable,thus markedly reducing the structural distortion under load,especially nonsymmetrical load.The structural features of the system,determination of initial pre-tension,dynamic functions,mechanical behaviors under load and the construction of main nodes,are introduced.