（广州华森建筑与工程设计顾问有限公司， 广州 510045）

[摘要] 佛山苏宁广场地标塔楼为钢管混凝土外框架-钢筋混凝土核心筒-钢结构伸臂桁架的超限超高层建筑结构。本文针对伸臂桁架的两类主要节点进行了设计与有限元分析，采用ABAQUS有限元软件对节点在中震、大震作用下的性能进行考察，以进行节点区域的板件厚度、尺寸及加劲板布置方式的优化设计，保证节点区域在中震作用下基本处于弹性状态，大震作用下节点区域基本不屈服的性能目标；并对节点区域范围内钢筋混凝土剪力墙、钢管混凝土框架柱内混凝土应力分布及损伤情况进行分析，以期发现其薄弱部分，对于塑形损伤严重的区域在后续的设计过程中进行相应的加强。

[关键词] 超限高层；伸臂桁架；应力集中；损伤因子；强度设计值；强度平均值

中图分类号：TU398+.2     文献标识码：A     文章编号： 14S1124

作者简介：李力军,高级工程师,一级注册结构工程师,Email：394667936@qq.com。

Design and analysis of the special joints of outrigger in Foshan Suning Plaza

Li Lijun ，Tang Rong，Zhang Chao

(Huasen Architectural & Engineering Designing Consultant Ltd. , Guangzhou 510045, China)

Abstract: Foshan Suning Plaza is a landmark high-rise building beyond code limits, which consist of concrete filled steel tubular (CFST) outer frame, reinforced concrete core wall and steel outriggers truss. In this paper, two main types of joints were designed and analyzed with finite element method. In order to design the plate thickness, size and arrange the stiffer, ABAQUS was used to studied the performance of joints under middle and rare earthquake. So that, joints could stay elastic under middle earthquake and could not be yielded under rare earthquake. At the last, the stress distribution and plastic damage of reinforced concrete and concrete in CFST were also studied. We found the weakened portion, Some strengthen measures will be used in subsequent designing process.

Keywords: high-rise building beyond code limits; outrigger; stress concentration; designing value of strength; mean of strength

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