建筑结构学报2013，Vol.34Issue(2)：99-105,7.
空间KK形圆管搭接节点承载力计算公式改进研究
Improved formula for loading capacity of multiplanar overlapped CHS KK-joints
摘要
Abstract
This paper reveals the deficiency of the formula for multiplanar overlapped CHS KK-joints both in plane and out of plane ( multiplanar KK-Ov joint) in the existing specifications and documents, and carries out parametric analysis on multiplanar KK-Ov joints. The main influencing parameters of multiplanar-effects coefficient μKK were determined. By means of multiple nonlinear regression analysis, the function of multiplanar-effects coefficient μKK was proposed and validated. Then, an improved design formula for CHS KK-Ov joints was recommended and compared with the test and FEA data and with the formulae in existing design specifications. The conclusions can be drawn that the formula established by test database for multiplanar gapped CHS KK-joint is not suitable to predict the ultimate capacity of CHS KK-Ov joints with four mutually overlapped braces; the expression of the functional relation between μKK and it' s main influence parameters γ ( ratio of chord diameter to twice wall thickness) , ζ1 ( ratio of transverse gap length to diametor) can correctly reflect the effect of spatial geometric parameters on ultimate capacity; the formula proposed in the paper, which is more concise and practical, has a higher degree of accuracy and reliability to the design of multiplanar KK-Ov joints.关键词
空间圆管KK形节点/有限元分析/空间调整系数/非线性回归/承载力/设计公式Key words
multiplanar CHS KK-joint/ FEA/ multiplanar-effects coefficient/ non-liner regression/ bearing capacity/ design formula分类
建筑与水利引用本文复制引用
孙建东,童乐为,王斌,陈以一..空间KK形圆管搭接节点承载力计算公式改进研究[J].建筑结构学报,2013,34(2):99-105,7.基金项目
山东省博士后创新项目专项资金项目(200902005),山东省中青年科学家奖励基金项目(2009BSB07017). （200902005）
