主管内填混凝土对矩形钢管节点受力性能的影响  

Effect of concrete filled in chord tube on the mechanical behavior of RHS steel tube joints

作　　者：刘君平[1,2] 刘永健[3] 

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]深圳市市政设计研究院有限公司,广东深圳518029 [3]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《西安建筑科技大学学报（自然科学版）》2011年第1期18-24,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-06-0855);国家西部交通建设科技资助项目(2006319812112);交通部应用基础研究项目(2006319812130)

摘　　要：为研究主管内填混凝土对矩形钢管节点受力性能的影响,探讨主管内填混凝土矩形钢管节点的受力机理,对比分析了主管内填混凝土矩形钢管节点和空钢管节点的受压、受拉和受弯性能,结果表明主管内填混凝土能够改善节点的受力性能,显著提高矩形钢管受压节点的承载力,受压节点的破坏模式转变为横向局部承压破坏;对矩形钢管受拉节点承载力提高不明显,但提高了节点的刚度,改变节点的破坏模式;能够提高受弯节点的刚度和承载力,其破坏模式可采用支管受拉翼缘有效宽度模型.主管内填混凝土后矩形钢管节点的承载力可根据对应的破坏模式来计算.To study the mechanical behavior of rectangular hollow section（RHS） steel tube joints with concrete filled in chords,mechanical behavior of compression,tension and bending are analyzed in this paper and compared with RHS steel tube joints.The results show that concrete filled in chord can improve the mechanical behavior of joints.It can obviously enhance the ultimate bearing capacity and rigidity of compression joint,and the failure mode of compression joints is local transverse compression failure.It does not have much effect on the ultimate bearing capacity of tension joints,but can enhance the rigidity of joints;and it can change the range of geometric parameters of failure mode：the failure modes of tension joint are punching failure mode,effective width failure mode and flange yield-line failure mode.The bending rigidity and ultimate bending capacity of joints are greater than RHS steel tube joints,and the failure mode of bending joints is considered as tension flange effective width failure mode of branch tube.The bearing capacity formula for three types joint are recommended according to its failure modes.

关 键 词：主管内填混凝土 矩形钢管节点 受压性能 受拉性能 受弯性能 破坏模式 承载力计算 

分 类 号：TU528.59[建筑科学—建筑技术科学] TU317.1