深圳恒大中心超高层结构设计

Super high-rise structural design on Shenzhen Evergrande Center

深圳恒大中心塔楼结构高度达393.9m,采用带加强层的巨柱框架-钢筋混凝土核心筒的结构形式。结构设计的主要特点包括:地基基础穿越碎裂带且场地北侧临近地铁,利用各区避难层或设备层设置环带桁架兼作转换桁架,仅在塔楼中部设置一道伸臂桁架,钢管混凝土巨柱随建筑体型不断内收并在中低区形成斜柱,以及核心筒偏心布置且在中区和高区向北侧逐步收进,形成南侧大跨度楼盖。通过采用YJK和ETABS软件对整体结构进行了多遇地震及风荷载下的弹性分析,采用ABAQUS软件进行了罕遇地震下动力弹塑性时程分析,并针对结构特点进行专项分析,对关键构件及重要部位采取加强措施。结果表明,结构各项指标均满足设计规范要求,设定的性能目标均能达到,该结构设计安全可靠并具有较好的经济性。

Shenzhen Evergrande Center Tower has a structure height of 393.9 m and adopts the structural form of a mega column frame with reinforced stories-reinforced concrete core tube. The main features of the structural design include: the foundations pass through the fracture zone and the north side of the site is adjacent to the subway. The ring-belt trusses are set up on the refuge or equipment floors in each district as conversion trusses, and only one outrigger truss is set in the middle of the tower. The position of the concrete-filled steel tube(CFT) mega columns are continuously retracted with the building shape and forming the inclined columns in the middle and low areas;the core tube is eccentrically arranged and gradually retracted to the north in the middle and high areas, forming large-span floors on the south side. By using YJK and ETABS software, the elastic analysis of the overall structure under frequent earthquakes and wind loads were carried out, and the dynamic elastic-plastic time history analysis under rare earthquakes was completed with ABAQUS software. Besides, the special analyses according to the structural characteristics were implemented. And the strengthening measures for the critical structural components and the important locations were conducted. The results show that all indexes met the code requirements, and the performance targets can be achieved. The structure design is safe, reliable and has good economic efficiency.