方钢管混凝土柱-钢梁外肋环板节点承载力试验研究  

Experimental study on load-bearing capacity of vertical stiffener joint connecting concrete-filled steel square tubular column and steel beam

作　　者：赵全斌[1] 杜刚[2] 苗纪奎[3] 林彦[2] 陈志华[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]山东建筑大学土木工程学院,山东济南250014 [3]山东建筑大学建筑城规学院,山东济南250014

出　　处：《建筑结构学报》2009年第S2期213-218,共6页Journal of Building Structures

基　　金：新世纪优秀人才支持计划项目(NCET);天津市建设系统科学技术发展项目(2008-24);山东省自然科学基金项目(Q2008F11)

摘　　要：为研究方钢管混凝土柱与钢梁受拉翼缘连接的结构性能,对新型节点-外肋环板节点梁翼缘受拉模型的传力机理进行了分析,提出了基于屈服线理论的节点承载力计算公式。采用正交试验法设计了10个节点模型试件并进行静力拉伸试验,研究了方钢管混凝土柱与钢梁翼缘连接的结构性能,介绍了各试件的破坏过程及特征,并对节点承载力实测值和理论计算值进行了比较分析。研究结果表明,外肋环板节点梁翼缘受拉模型具有较高的承载力和良好的延性,影响节点承载力的主要因素是竖向肋板的截面尺寸,水平环板的宽度对节点的承载力影响不大,但在钢管中填充混凝土有利于提高节点的屈服承载力和刚度,理论分析提出的计算公式较好的预测了节点模型的屈服承载力。In order to investigate the structural behavior of the connection connecting concrete-filled square steel tubular column and steel beam,the force transfer mechanism of the vertical stiffener joint model with only tensile beam flange is firstly analyzed.Based on the yield line theory,the formula for calculating the bearing capacity of the joint is presented.Ten specimens of the joint model designed using orthogonal test method are studied through static tensile tests to investigate the structural behavior of the connection between concrete-filled square steel tubular column and steel beam.The failure process and features of each specimen are described and the stress transfer mechanism in the connection zone is analyzed.Then the measured bearing capacity of this kind of new joint is compared with the calculated one.Research results indicate that the vertical stiffener joint has high capacity and good ductility and the section size of vertical stiffener is the main factor influencing the load-bearing capability of joint.The width of the horizontal stiffener has no obvious effects on joint strength,and the yield capacity and stiffness can be increased by the concrete filled in the tube.The formula deduced from theory analysis is reasonable to predict the yield loading capacity of the vertical stiffener joint.

关 键 词：方钢管混凝土柱 外肋环板节点 屈服线理论 静力拉伸试验 屈服承载力 

分 类 号：TU398.9[建筑科学—结构工程]