范 重 彭 翼 李 鸣 赵莉华(中国建筑设计研究院 北京 100044)
陈以一 赵宪忠(同济大学 上海 200092)
【提要】 结合国家体育场大跨度钢结构设计，提出了大尺寸焊接薄壁箱形截面桁架单K节点的
几何构型方法，可用于折线形弦杆、弦杆侧壁与腹杆侧壁不垂直等多种情况，适用范围较大。
通过调整节点板件之间的角度，使其传力合理。综合采用调整板厚、设置加劲肋等方式，提高
节点的承载力，实现“节点与构件等强”的设计理念。此外，通过缩尺模型对所提出的单K节
点进行验证性试验，试件的应力分布与有限元计算结果非常接近，节点具有较大的安全储备。
【关键词】 焊接箱形构件 单K节点 几何构型 有 限元分析 试验研究
Design and Research of Kconnections of Welded Thinwall Boxsections Truss
of the National Stadium/Fan Zhong1,Peng Yi1，Li Ming1,Zhao Lihua1,
Chen Yiyi2,Zhao Xianzhong2
(1 China Architecture Design & Research Group,Beijing 100044,China；2 Tongji Un
iversity,Shanghai 200092,China)
Abstract:During the design procedure of the largespan roof structure of the
National Stadium,a kind of K connections configuration method for largescale
welded thin wall boxsections is presented,which can be used when the chords
are segmental straight,and the walls of chords are not perpendicular to diagonals,
etc.The angles between plates of the connections are adjusted to make the force
transfer more reasonable.The bearing capacity of the connections is improved by
adjusting plate thickness and arranging stiffeners,which can realize the design
conception that the strength of the connections can be equal to that of the members.
In addition,the scaledspecimen are made to prove the reliability of the connections.
The results show that the stress distribution of the specimen is consistent with that
of the finite element analysis,and the estimation of the connection bearing capacity is
safe.
Keywords:welded boxsection;K connection;geometric configuration;finite element analysis;stiffener;experiment