岁宝国展中心空中连桥结构设计

Structural design of sky corridors for SuiBao International Exhibition Center

岁宝国展中心的三栋超B级高度塔楼,在141m标高上通过两个空中连桥相连,连桥的设计是该项目的重要设计难点;三栋塔楼及连桥均不在同一条轴线上,本项目属于不对称多塔多向高位连体结构。系统论述了空中连桥结构体系及其分析方法,提出了摩擦摆隔震支座的连接方案;全面分析了支座力学性能对竖向及水平传力的影响,介绍了用SAP2000进行连桥受力分析的方法和具体步骤。结果表明:支座的设计可以满足大震下受力和变形的要求,采用摩擦摆隔震支座后可显著减少连桥与塔楼之间的相互作用,连桥设计满足小震、中震、大震、抗倾覆等不同设计工况下的要求。

The three towers with super-B height of SuiBao International Exhibition Center are connected by two sky corridors at an elevation of 141m.The design of the corridors is an important design difficulty of the project.Since the three towers and the corridors are not on the same axis,this project belongs to asymmetrical multi-tower multi-directional high-level conjoined structure.The structural system and its analysis method of the sky corridors were discussed systematically,and the connection scheme of the friction pendulum bearing was put forward.The influence of the mechanical properties of the bearing on the vertical and horizontal force transmission were comprehensively analyzed,the method and specific steps of using SAP2000 to analyze the corridors force were introduced.The results show that the design of the bearing can meet the requirements of force and deformation under rare earthquakes,and the interaction between corridors and tower can be significantly reduced by using the friction pendulum bearing.The design of the corridors can meet the requirements of different design conditions such as frequent earthquake,moderate earthquake,rare earthquake and anti-overturning.