（1 中南林业科技大学土木工程与力学学院， 长沙 410000；2 湖南科技大学土木工程学院， 湘潭 411201）

［摘要］提出钢管混凝土柱与钢筋混凝土梁整体连接的新型节点形式。在钢管混凝土柱与钢筋混凝梁连接区将钢管断开，使钢筋混凝土梁中的纵向钢筋直接伸入支座节点，节点区梁柱混凝土整体浇筑，方便节点施工且保证节点刚度。为了弥补由于钢管断开造成的节点强度不足，对节点无钢管区域采用柱纵筋、环向密箍和钢筋网片进行加强。通过对3个节点试件进行轴心受压试验，研究了节点的受力特性。试验结果表明，在轴向荷载作用下，加强后的节点破坏迟于钢管混凝土柱的破坏，承载能力高于钢管混凝土柱，而且有一定的延性，证实了这种节点在轴向加载条件下的可行性，且满足“强节点”的抗震设计原则。

［关键词］钢管混凝土柱; 钢管非连通; 节点加强; 轴向加载; 试验研究

中图分类号：TU398      文献标识码：A      文章编号：1002-848X(2014)16-0055-04

Axial compression experimental study on new CFST column-RC beam joints

Chen Bowang1, Yu Hualong2, Cao Yan2, Tang Chu1, Zou Yanhua1

 (1 College of Civil Engineering and Mechanics, Central South University of Forestry and Technology,  Changsha 410000, China; 2 College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

Abstract: A new type of concrete-filled steel tube (CFST) column-RC beam joint was presented. In the CFST column-RC beam connecting zone，the steel tube was broken for the stretch of the longitudinal bar of reinforced concrete beams into the joint. The concrete of the column and beam was cast integrally to simplify the construction of joint and strengthen the joint stiffness. To make up the insufficient strength caused by the broken steel tube, longitudinal bars, toroidal dense hoops and steel meshes were used to strengthen the joint zone without the steel tube. Mechanism performance of the joint was studied in the experiments of three joint specimens. The experimental results show that under the axial loading, the failure of the reinforced joint happens after the failure of the concrete-filled steel tube column, and the bearing capacity of the joint is higher than that of the concrete-filled steel tube column. Besides, the joint has certain ductility, the feasibility of the joint under the axial loading is verified, and the joint meets the seismic design principle of strong joint.

Keywords: concrete filled steel tube column; discontinue steel tube; strengthen joint; axial loading; experimental study

*湖南省高等学校科学研究项目（10A017）。

作者简介：陈伯望，博士，教授，Email:tmcbw@163.com。

参考文献

［1］CECS 28∶92 钢管混凝土结构设计与施工规程［S］.北京：中国建筑工业出版社，1992.

［2］聂建国，柏宇，李盛勇，等.分层钢管混凝土节点轴压性能的试验研究［J］.建筑结构,2004,34(12)：57-59.

［3］韩林海.钢管混凝土结构——理论与实践［M］.北京:科学出版社，2004:134-138.

［4］蔡绍怀.现代钢管混凝土结构［M］.北京:人民交通出版社,2003:54.

［5］张莉若,汤中发，刘明贵.套筒式钢管混凝土梁柱节点试验研究［J］.建筑结构,2005,35(8):73-75, 84.

［6］汤文锋.新型钢管混凝土柱节点静力模型试验研究［D］.西安:长安大学,2004.

［7］陈庆军,蔡健,林遥明.柱钢管不直通的新型钢管混凝土柱-梁节点(Ⅰ)——轴压下采用钢筋网加强钢管不直通的节点区的性能［J］.华南理工大学学报:自然科学版, 2002,30(9):91-95.

［8］王毅红,汤文锋.芯钢管连接的钢管混凝土中柱节点试验研究［J］. 建筑结构,2004,34(12):60-63.

［9］JGJ 3—2010 高层建筑混凝土结构技术规程［S］.北京：中国建筑工业出版社，2011.