(华东建筑设计研究院有限公司, 上海 200002)

摘要: 上海张江双子塔是由两栋高度及立面相同的超高层塔楼组成,结构高度为 298m,采用框架⁃核心筒⁃环带桁架的结构体系,为超 B 级高度超限高层结构. 双子塔的主要结构特点是为匹配幕墙立面,外框直柱和斜柱相结合形成交汇及分叉的复杂节点;此外,双塔均设置了两道环带桁架作为加强层,高区核心筒均有斜墙单侧收进. 重点介绍外框斜柱承担剪力比、核心筒斜墙性能化设计、交汇及分叉柱的复杂节点设计、黏弹性阻尼器减震方案的可行性等关键问题. 采用 YJK、ETABS 和 SAUSAGE 等软件进行整体弹性及动力弹塑性分析,并进行抗震性能化设计,对关键及薄弱构件采取针对性加强措施. 选取其中一栋塔楼计算结果为例,结果表明:塔楼结构选型及布置合理,具有良好的抗风和抗震性能.

关键词: 超高层结构; 抗震性能设计; 斜柱剪力比; 斜墙收进; 节点设计; 黏弹性阻尼器

中图分类号:TU973. 3 文献标志码:A 文章编号:1002⁃848X(2022)10⁃0034⁃08

DOI:10. 19701 / j.jzjg.HDY2206

Key issues in structural design of Shanghai Zhangjiang twin towers

QIAN Peng

(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)

Abstract: Shanghai Zhangjiang twin towers are composed of two super high⁃rise towers with the same height and elevation.The 298m⁃structural⁃height twin towers are super class B high⁃rise structures, and the frame⁃tube⁃belt truss structuralsystems are adopted. The main structural characteristics of the twin towers are that in order to match the building facade,the straight columns and inclined columns of outer frame are combined to form complex nodes of intersection andbifurcation. Additionally, two belt trusses are designed as the strengthening layers for each tower, and step⁃back of inclinedwalls are set at one side in the high area of each tower. The key problems were focuses on such as the shear ratio of outerframe inclined columns, the performance⁃based design of inclined walls, the complex joint design of intersection andbifurcation columns, and the energy⁃dissipating scheme of viscoelastic damper. The softwares of YJK, ETABS andSAUSAGE were used for overall elastic and dynamic elastic⁃plastic analysis, and targeted strengthening measures weretaken for key and weak components by seismic performance⁃based design. Taking one tower of twin towers as an example,the results show that the scheme and layout of the structures are reasonable, and the structures have good wind resistanceand seismic performance.

Keywords:super high⁃rise building; seismic performance⁃based design; shear ratio of inclined columns; step⁃back ofinclined wall; joint design; viscoelastic damper

∗“上海超高层建筑设计工程技术研究中心”建设项目(14DZ2252800).

第一作者:钱鹏,博士,高级工程师,主要从事高层结构设计工作,Email:pengqian@ ecadi.com.

[引用本文] 钱鹏. 上海张江双子塔结构设计关键问题[J]. 建筑结构,2022,52(10):34⁃41. QIAN Peng. Key issuesin structural design of Shanghai Zhangjiang twin towers[J]. Building Structure,2022,52(10):34⁃41.