腾讯滨海大厦连接体楼板刚度的影响研究

Tencent Seafront Tower: influence study of stiffness of connected floor

腾讯滨海大厦为连体巨型结构,3道连接体与两栋塔楼形成整体刚度,以抵御侧向荷载。楼板是连接体的重要组成部分,在荷载组合作用下,楼板出现裂缝,将出现刚度退化,进而导致连接体出现内力重分布。以中区和高区连接体为研究对象,分析楼板刚度退化所带来的结构整体性能变化和连接体构件的内力重分布情况。结果表明,连接体楼板刚度退化对结构整体性能影响较小,但在连接体内会出现明显的内力重分布,内力重分布具有显著的特征,连体结构的不同楼层其内力重分布程度不一样,不同类型和不同部位构件内力重分布程度也不一样,在连体子结构的设计中应充分考虑其影响。

Tencent Seafront Tower is a giant connected structure with three connected bodies and two towers forming the overall stiffness to resist lateral loads. Slab is an important part of the connected body. Under the combined action of loads,cracks appear in the floor,and stiffness degradation occurs,leading to the redistribution of internal forces in the connected body. Taking the connected bodies in the middle and high regions of the structure as the research objects,the overall structural performance changes and internal force redistribution of the connected bodies caused by the degradation of floor stiffness were analyzed. The results show that the degradation of slab stiffness has little effect on the overall performance of the structure,but there will be obvious redistribution of internal force in the connected body. Internal force redistribution has significant characteristics. The redistribution degree of internal force is different in different slabs of connected structure,and the redistribution degree of internal force in different types and parts is also different. The influence of internal force redistribution should be fully considered in the design of connected substructures.