深圳湾创新科技中心超高层连体结构方案设计与研究

Structural scheme design and analysis of super-tall connected structure for Shenzhen Bay Innovation and Technology Center

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,连接体均采用钢桁架结构。首先介绍了项目的工程概况、结构体系、地基基础、加强层分析,然后介绍了分别采用强连接和弹性连接方式时,结构在小震下的楼层剪力、顶点位移、连接体内力、周期、振型模态、加速度反应的对比分析,小震、中震、大震下的与连接体相连外框柱内力的对比分析,大震下的位移时程的对比分析。分析结果表明,层数相差悬殊的高位连体结构采用强连接是可行的,同时该连接方式对建筑立面效果、幕墙、机电等专业影响最小。此外还提出了强连接的构造措施。

The two super-tall towers of Shenzhen Bay Innovation and Technology Center are connected by two connected bodies. The two towers of the asymmetric twin-tower connected structure have different heights. The main structure adopts the hybrid structure of concrete filled steel tubular laminated column frame-reinforced concrete corewall and the connected bodies adopt the steel truss structure. First,the project survey,structural system,foundation and strengthening layer analysis were introduced. Then under the two different connection forms of elastic and rigid connection,comparison and analysis of the floor shear force,top displacement,internal force of connected body,period,vibration mode,acceleration response was conducted under action of frequent earthquake,comparison and analysis of internal force of outer framecolumn connected to connected body were introduced under action of frequent earthquake,medium earthquake and rare earthquake,comparison and analysis of displacement time-history analysis under action of rare earthquake was conducted.Analysis results show that it is feasible for the high-position connected structure with greatly differed layer numbers to adopt rigid connection,and it has the smallest effect on the building elevation,curtain wall,mechanical and electrical,etc. In addition,detail measures for the rigid connection were proposed.