圆钢管混凝土节点平面内抗弯刚度研究  

ANALYSIS ON THE FLEXURAL RIGIDITY OF CHS-CFCHS JOINTS UNDER IN-PLANE BENDING MOMENT

作　　者：王新毅[1,2] 童乐为[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]南昌工程学院土建学院,南昌330099

出　　处：《钢结构》2016年第1期14-17,21,共5页Steel Construction

基　　金：国家自然科学基金项目资助(50478108)

摘　　要：对圆钢管混凝土T/Y型节点在平面内弯矩作用下的抗弯刚度进行数值分析和试验验证,比较空钢管节点和内填充混凝土钢管节点抗弯性能的差异,分析节点各无量纲参数对抗弯刚度的影响,给出钢管混凝土节点的抗弯刚度计算公式。研究表明:空钢管节点的主管内填充混凝土后,节点的抗弯刚度有明显的提高,节点刚度取决于弦杆的径向刚度和弦杆、腹杆相贯面的表面积;节点刚度随主、支管管径比β和主支管厚度比τ的增大而提高,随径厚比γ和主、支管夹角θ的增大而降低;内填充混凝土强度的变化对节点的抗弯刚度影响较小。The numerical analysis and experimental verification for T / Y CHS-CFCHS joint specimens with different geometry parameters were conducted under in-plane moment by FEM. The flexural behavior of hollow steel tube joints and concrete-filled steel tube joints were compared. The influence of dimensionless parameters on the joint rigidity of concrete filled circle hollow section（ CFCHS） joints was analyzed. The formula for flexural rigidity of CHS-CFCHS joints was established based on joint geometry parameters. The results showed that the joint rigidity of CHS-CFCHS joints increased accordingly compared to CHS joints. Joint rigidity depends on chord stiffness and the brace-chord contact area. The joint rigidity decreased with the increase of values of γ or θ; and increased with the increase of values of β or τ. The joint rigidity was less affected by the strength of in-fill concrete.

关 键 词：圆钢管节点 圆钢管混凝土节点 抗弯刚度 有限元 

分 类 号：TU398.9[建筑科学—结构工程]