(中国中元国际工程有限公司, 北京 100089)

摘要: 海口双子塔⁃南塔结构体系为设置加强层的巨型支撑框架⁃核心筒混合结构,其中腰桁架采用折线型布置,其与在同一平面内布置的常规直线型腰桁架在受力性能、杆件布置和节点构造上均有较大不同. 通过对不同弦杆夹角腰桁架结构模型算例的计算分析,得到了折线型腰桁架杆件的弯曲变形、剪切变形、轴向变形和扭转变形分量分别引起的结构侧向变形的比例关系,及主要变形分量引起的结构侧向变形与折线型腰桁架弦杆夹角的关系,提出了影响折线型腰桁架抗侧刚度的主要影响因素与变化规律,折线型腰桁架的抗侧刚度与腰桁架弦杆夹角正弦的平方近似为线性关系. 根据折线型腰桁架的特点提出了杆件布置和节点设计的原则,对于复杂空间结构桁架合理设置腹杆角度可以使节点设计简单、传力可靠.

关键词: 海口双子塔; 超高层建筑; 加强层; 腰桁架; 抗侧刚度

中图分类号:TU398. 7 文献标志码:A 文章编号:1002⁃848X(2022)16⁃0022⁃04

DOI:10. 19701 / j. jzjg. ZJ200033

Study on fold⁃line⁃shaped belt truss of Haikou Twin Towers⁃South Tower

ZHANG Song, ZHANG Tongyi, WANG Ning, XIAO Ziqiang, ZHANG Zhe, LUO Youxin, ZHANG Te

(China IPPR International Engineering Co. , Ltd. , Beijing 100089, China)

Abstract: The structural system of Haikou Twin Towers⁃South Tower is mixed structure of mega brace frame⁃corewall withstrengthened⁃stories. Compared with the conventional linear belt truss arranged in one space, the belt trusses are differentin the mechanical performance, the arrangement of the members and the joints construction. Through the calculation andanalysis of the model examples of belt truss structures with different chord angles, the proportional relationship of the lateraldeformation of the structure caused by the bending deformation, shear deformation, axial deformation and torsionaldeformation components of the fold⁃line⁃shaped belt truss members, and the relationship between the lateral deformation ofthe structure caused by the main deformation components and the chord angle of the fold⁃line⁃shaped belt truss, the maininfluencing factors and the changing law of the lateral stiffness of the fold⁃line⁃shaped belt truss were put forward. Thelateral stiffness of the fold⁃line⁃shaped belt truss is approximately linear with the square of the sine of the chord angle of thebelt truss. According to the characteristics of the fold⁃line⁃shaped belt truss, the principles of member arrangement andjoint design were put forward. For complex space structure truss, reasonable setting of the web member angle can make thejoint design simple and the force transmission reliable.

Keywords:Haikou Twin Towers; super high⁃rise building; strengthened⁃stories; belt⁃truss; lateral stiffness

∗企业横向科研基金项目(S2016013R).

第一作者:张松,博士,教授级高级工程师,一级注册结构工程师、注册土木工程师(岩土),主要从事复杂结构设计研究,Email:zhangsong@ ippr. net.

[引用本文] 张松,张同亿,王宁,等. 海口双子塔⁃南塔折线型腰桁架设计研究[ J]. 建筑结构,2022,52(16):22⁃25,6. ZHANG Song,ZHANG Tongyi,WANG Ning,et al. Study on fold⁃line⁃shaped belt truss of Haikou Twin Towers⁃SouthTower[J]. Building Structure,2022,52(16):22⁃25,6.