（青岛北洋建筑设计有限公司， 青岛 266071）

［摘要］某超高层地下2层、地上79层，顶部68～79层逐层内收，桅杆顶高度为339m。采用了带加强层的“矩形钢管混凝土柱外筒-钢筋混凝土内筒”的筒中筒混合结构体系，为了满足侧移刚度要求，结合设备层和避难层的布置设置了3道结构加强层。介绍了该工程结构选型、抗震性能目标及主要分析结果，采用SATWE，MIDAS Building软件进行了施工阶段模拟分析、多遇地震弹性时程分析和罕遇地震动力弹塑性分析。计算结果表明，该工程安全可靠，能够满足抗震性能设计目标。

［关键词］筒中筒； 混合结构； 加强层； 抗震性能设计； 弹塑性时程分析； 施工模拟

中图分类号：TU398-2文献标识码：A文章编号：1002-848X(2019)09-0027-06

Structural design of a super high-rise tube-in-tube system with concrete-filled steel tube columns

Du Tao, Xia Shiqun, Liu Wenzhong, Cao Xichen

(Qingdao Beiyang Architectural Design Co., Ltd., Qingdao 266071, China)

Abstract:A super high-rise building contains 2 stories underground and 79 stories aboveground, with diminishing stories from 68th floor to 79th floor, and the relative elevation of the top of the mast is 339m. It adopts tube in tube hybrid structural system composed of concrete-filled rectangular steel tube and RC core with strengthened stories. To enhance the lateral stiffness, combined with the equipment layer and the layout of the shelter layer, three structural reinforcement layers were set up. The structural system selection of the building was introduced as well as seismic performance design goals and the main analysis results. The simulation analysis of construction stage, elastic time-history analysis under the frequent earthquake and elastic-plastic time-history analysis under the rare earthquake were carried out by SATWE，MIDAS Building. Analysis results show that the structure of this project is secure and reliable, and it can fulfill seismic performance design goal.

Keywords:tube-in-tube structure; hybrid structure; strengthened story; seismic performance design; elastic-plastic time-history analysis; construction simulation

作者简介：杜涛，硕士，高级工程师，一级注册结构工程师，Email：qdbeiyang@126.com。