长沙国金中心T1塔楼总体结构设计

Overall Structural Design of Changsha IFC T1 Tower

长沙国金中心T1塔楼建筑高度452 m,结构高度440.45 m,地上共92层;塔楼还存在斜柱转换、高位梁托柱转换等超限问题。论述了塔楼采用的结构体系及针对超限的相关结构对策;介绍了风荷载及地震作用的取值方法;阐述了塔楼基础的选型问题;归纳了塔楼弹性分析的主要结构指标,计算结果能够满足规范和超限审查专家的要求。考虑非荷载效应的塔楼施工模拟分析表明,巨柱与核心筒、巨柱与角柱等之间的竖向变形差对伸臂桁架及环带桁架的影响很小。塔楼核心筒剪力墙在中震下总体处于受压状态。弹塑性时程分析显示,罕遇地震下塔楼的位移满足规范要求,结构总体处于弹性状态,证明了结构的安全性。

Building height of the Changsha IFC T1 tower is 452 m,and its structural height is 440.45 m. Overground floor number is 92.Beside the structural height,the super high-rise tower exist some other transfinite problems such as inclined column transferring.Structural system of the tower and structural countermeasure to tackle transfinite problem are introduced.Obtaining value method for wind load and seismic action of the structure is put forward.Problem of foundation type selection is discussed.Main structural index of the tower is presented;elastic analysis results can satisfy demands of structural experts and Chinese code.Construction simulation analysis considering the non-load effect of the structure demonstrators that vertical deformation of the column and shear wall has little effect on strength of belt truss and outriggers.Shear wall of the tower is in a state of overall compression under middle seism.Elastic-plastic time-history analysis manifests that drift of the tower under rare earthquake load satisfy Chinese code requirements;overall structure is mostly in an elastic state.