国家金融信息大厦结构转换层分析

Analysis of transfer floor structure in National Financial Information Building

国家金融信息大厦高360m,采用框架/密柱筒-核心筒结构体系,结构在60层做一次方形变圆形的转换。对转换层结构进行了详细的有限元分析,获得了转换层在罕遇地震作用下的应力状态,评估了转换桁架、核心筒、钢管混凝土柱、钢梁等构件的震后性能状况。并根据转换层模型的力学分析结果,对转换桁架上弦杆节点进行了精细的分析设计,使其满足性能要求。

National Financial Information Building is a mega frame tube-corewall structure with height of 360 m. The 60 th floor of the building is designed as a transfer floor of structural change from square to circle shape. A detailed finite element analysis was conducted on the transfer floor structure to obtain the stress state under the rare earthquake and evaluate the post-earthquake properties of components including transfer truss,corewall,concrete filled steel tubular column and steel beams. And according to the mechanical analysis results of transfer floor model,a fine analysis and design was carried out on the upper chord member joint of transfer floor,so that it could meet the performance requirements.