(gad 杰地设计.浙江绿城建筑设计有限公司,杭州 310007)

摘要: 湖州南太湖 CBD 主地标塔楼为高度 318m 的高度超限项目，采用钢管混凝土框架-钢筋混凝土核心筒-伸臂桁架-环带桁架结构体系。项目外形为曲面形体，底部分叉类似人字形结构，结构外框采用小角度斜柱拟合建筑形体，两塔楼底部由连接桁架相连。介绍了针对人字形结构特点的基础设计策略，以及结构的刚重比、剪重比、层间位移角、框架承担剪力比例等整体指标情况；比较了单塔模型与连体模型结构的自振周期和分塔水平位移，分析了表现出分塔动力特性的首阶振型，结果表明当上部连体结构约束住分塔的变形时，按立面开洞判定的单塔计算模型能够准确反映出人字形结构的整体特性；此外，还介绍了连接体、伸臂桁架、环带桁架、底部通高柱及顶部 28m×31m 拉索幕墙自平衡钢外框的分析与设计。

关键词: 超限高层建筑； 立面开洞； 人字形结构； 连体桁架； 巨型拉索幕墙钢外框

中图分类号:TU318+. 1 文献标志码:A 文章编号:1002-848X(2022)19-0022-07DOI:10.19701 / j.jzjg.gad2209

Structural design of the main landmark tower in South Taihu CBD of Huzhou

QI Xiangming,LONG Gan,ZHU Qi,YAO Kaiming,XUE Jinke，ZHONG Zhouneng,HU Damin,FANG Xunke

(gad.Zhejiang Greenton Architectural Design Co. ,Ltd. ,Hangzhou 310007,China)

Abstract: The main landmark tower in South Taihu CBD of Huzhou is an out-of-code project with a height of 318m. Itadopts a concrete-filled steel tube frame-reinforced concrete core tube-outrigger truss-ring belt truss structure system. Thegeometric shape of the tower is curved plane,and the bottom structure is similar to a herringbone structure. The outer frameof the structure adopts a small-angle inclined column to fit the building shape,and the bottom of the two towers is connectedby a conjoined truss. The basic design strategy according to the characteristics of the herringbone structure,as well as theoverall indicators such as the stiffness gravity ratio,shear gravity ratio,displacement angle,and frame shear ratio wereintroduced. The natural vibration period and the horizontal displacement of the sub-tower of the single-tower model and theconjoined model structure were compared,and the first-order mode shape showing the dynamic characteristics of thesub-tower was analyzed. The results show that when the upper conjoined structure restrains the deformation of the sub-tower，the single-tower calculation model determined by the facade opening can accurately reflect the overall characteristics of theherringbone structure； in addition,the connection members,outrigger truss,ring-belt truss,bottom double-height column，and the analysis and design of balanced steel outer frame of the top 28m×31m cable curtain wall were also introduced.

Keywords:out-of-code high-rise structure； facade opening； herringbone structure； conjoined truss； giant cable curtain wallsteel frame

第一作者:戚向明，硕士，高级工程师，一级注册结构工程师，主要从事公建、住宅等结构设计工作，Email:582798010@ qq. com。

[引用本文] 戚向明，龙甘，朱奇，等. 湖州南太湖 CBD 主地标塔楼结构设计[J]. 建筑结构，2022，52(19):22-28.QI Xiangming，LONG Gan，ZHU Qi ，et al. Structural design of the main landmark tower in South Taihu CBD of Huzhou[J]. Building Structure，2022，52(19):22-28.