同济大学学报（自然科学版）2026，Vol.54Issue(1)：40-53,14.DOI:10.11908/j.issn.0253-374x.24299
圆钢管KK'X型节点性能的试验与数值分析
Experimental and Numerical Analysis of the Performance of Circular Hollow Section KK'X Joints
摘要
Abstract
The behavior of multiplanar KK'X gap joints in circular hollow section(CHS)trusses was investigated experimentally and numerically.First,failure tests on two KK'X joints with different geometric parameters were conducted with different geometric parameters to examine their deformation feature,failure mode,load-deformation responses,ultimate bearing capacities,and strain intensity distributions.Next,a finite element(FE)model of KK'X joints was established and validated against the experimental results.The plastic zone and its development were analyzed using this model.The results indicate that the failure mode of the all joints belongs to chord plasticization.The depression deformation of chord wall at K compressive brace came to maximum.Increasing the brace diameter could enhance the ultimate bearing capacity of the joint.The stress distribution near the intersection between brace and chord is more complicated,with the maximum strain intensity occurring at the chord saddle adjacent to the K compressive brace,where yielding initiates first.The plastic zone then propagates outward,eventually encompassing the most region of the joint region.关键词
圆钢管桁架/空间KK'X型节点/静力试验/有限元分析/破坏模式/极限承载力Key words
circular hollow section(CHS)truss/multiplanar KK'X joints/static test/finite element(FE)analysis/failure mode/ultimate bearing capacity分类
建筑与水利引用本文复制引用
颜阳,菅广跃,童乐为,赵成云,张得旺,吴斌..圆钢管KK'X型节点性能的试验与数值分析[J].同济大学学报（自然科学版）,2026,54(1):40-53,14.基金项目
上海市高峰学科建设项目(2019010301) （2019010301）
中铁上海院集团科研计划(集-20-63) （集-20-63）
