Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (7): 128-134.doi: 10.3969/j.issn.1000-565X.2010.07.023

• Architecture & Civil Engineering • Previous Articles     Next Articles

Theoretical Investigation into Axial Bearing Capacity of Planar Intersecting Connections of Concrete-Filled Steel Tube

Huang Chao 1.2  Han Xiao-lei 1.2  Ji Jing 1.2  Xie Wei-qiang 2   

  1. 1. State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-09-03 Revised:2009-12-23 Online:2010-07-25 Published:2010-07-25
  • Contact: 黄超（1984-）,男,博士生,主要从事钢管混凝土结构和高层建筑结构抗震研究. E-mail: chao.huang@mail.scut.edu.cn
  • About author:黄超（1984-）,男,博士生,主要从事钢管混凝土结构和高层建筑结构抗震研究.
  • Supported by:

    国家自然科学基金资助项目（50878087）; 亚热带建筑科学国家重点实验室自主研究项目（2008ZA08）

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Abstract:

In this paper,first,the axial bearing capacities of short concrete-filled steel tubular （ CFST） columns with thickness-variable steel plate and with two novel types of intersecting connections are analyzed,and the corresponding calculation formula is proposed. Then,the static loading tests of the two types of connections are simulated using the finite element method,and the variations of the bearing capacity with the intersecting angle as well as with the thickness of the elliptical plate,the lining plate,the reinforcing plate and the flange plate are analyzed, the results according well with the test ones. It is found that the elliptical plate,the lining plate and the reinforcing plate all enhance the confinement effect on the core concrete,that the bearing capacity of the connections increase with the intersecting angle as well as with the thickness of the elliptical plate and the lining plate,while it is insensitive to the thickness of the reinforcing plate and the flange plate,and that,the proposed formula is applicable due to its high accuracy of estimating the bearing capacity of connections.

Key words: concrete-filled steel tube, diagrid structure, planar intersecting connection, bearing capacity, finite element analysis, parametric analysis