建筑钢结构进展2025，Vol.27Issue(12)：20-29,10.DOI:10.13969/j.jzgjgjz.20240626001
平面K形圆钢管搭接节点极限承载力公式研究
Research on Ultimate Capacity Formula for Planar Overlapped CHS K-joints
摘要
Abstract
This paper introduces the evolution of ultimate capacity equations for overlapped CHS K-joint and reveals the shortcomings of existing equations.A finite element parametric analysis was conducted to study the failure modes of overlapped joints with various geometric configuration.The effects of different parameters,including joint geometric dimension,brace overlapping sequence and the presence or absence of hidden weld,on ultimate capacity were compared and analyzed,based on which the detailing suggestions on joints were proposed.Through the joint efficiency concept,the joint capacity was nondimensionalized by dividing by the brace section yielding strength,resulting in a simplified and rational capacity formula.The joint efficiency factor was determined by multiple regression analysis.Compared with several sets of experimental and numerical results,the precision and reliability of the proposed formula were proved,and meanwhile the formula can be also applicable to unsymmetrical joints.The capacity equation has been adopted in current standards for design of steel structures.关键词
K形圆管搭接节点/极限承载力/破坏模式/有限元分析/参数分析/节点效率系数Key words
overlapped CHS K-joint/ultimate capacity/failure mode/finite element analysis/parametric analysis/joint efficiency factor分类
建筑与水利引用本文复制引用
赵宪忠,李明,陈以一,闫伸..平面K形圆钢管搭接节点极限承载力公式研究[J].建筑钢结构进展,2025,27(12):20-29,10.基金项目
《钢结构设计规范》国家标准修订专项基金 （）
