深圳湾创新科技中心超高层连体结构设计

Connected structure design of super-tall tower of Shenzhen Bay Innovation and Technology Centre

深圳湾创新科技中心两栋超高层塔楼由两道连接体相连,两栋塔楼高度不等,为非对称双塔连体结构。主体结构采用钢管混凝土叠合柱框架-钢筋混凝土核心筒混合结构,连体均采用钢绗架结构。首先介绍了本项目的工程概况、结构方案选择、连体结构设计要点、主要构件尺寸与材料,然后介绍了结构超限情况、风洞试验与规范风荷载作用下对比分析、小震弹性分析、弹性时程分析、中震分析和大震分析等内容。分析结果表明,对于带连体的超高层结构,应考虑尽量少设置加强层,以减少对竖向刚度突变的不利影响,同时还需采用最可靠的、对建筑立面效果、幕墙等影响小的连接方式,并针对此提出了相应的解决方案。

Shenzhen Bay Innovation and Technology Centre consists of two super-tall towers linked by two connected structures. The whole building structure is an asymmetrical twin-tower connective structure because the heights of two towers are different. The main structure adopts concrete filled steel tube laminated column frame-reinforced concrete corewall hybrid structure. The connected structures adopt steel truss structure. The contents were introduced including the project overview,structural scheme selection,key points in connected structure design,size and material for main components,out-of-code conditions for the structure,comparison and analysis of the structure under wind tunnel test and specification wind load actions,elastic analysis under frequent earthquakes,elastic time-history analysis,analyses under fortification earthquake and rare earthquake. Analysis results show that there should be minimum strengthening layers as far as possible in the super-tall towers linked with connected structure to reduce the negative impact of the vertical stiffness mutation. At the same time,the most reliable connecting method with small impacts on the building elevation effect and curtain wall should also be adopted,and relevant solutions were proposed.