Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (11): 26-31.doi: 10.3969/j.issn.1000-565X.2010.11.006

• Architecture & Civil Engineering • Previous Articles     Next Articles

A New Method to Calculate Axial Bearing Capacity of Composite Columns with Core of High-Strength Concrete-Filled Steel Tube

Long Yue-ling1  Cai Jian2   

  1. 1.Department of Civil and Structural Engineering,The Hong Kong Polytechnic University,Kowloon,Hong Kong,China;2.Department of Civil Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-11-02 Revised:2010-05-25 Online:2010-11-25 Published:2010-11-25
  • Contact: 龙跃凌（1978-），男，博士，现任职于广东工业大学，主要从事结构工程研究． E-mail:longyueling@163．net
  • About author:龙跃凌（1978-），男，博士，现任职于广东工业大学，主要从事结构工程研究．
  • Supported by:

    国家自然科学基金资助项目（50878087）; 广东省自然科学基金资助项目（9451009001002744）; 科技部重大基础研究前期研究专项基金资助项目（2004CCA03300）

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Abstract:

Based on the analysis of the bearing mechanism of composite columns with core of high-strength concrete-filled steel tube,a new method to calculate the axial bearing capacity of the composite columns is proposed,which considers not only the difference in confinement effect between the concrete both inside and outside the tube,but also the influence of circular section and square section on the concrete outside the tube.The proposed method is then applied to the calculation of axial bearing capacity of 16 composite columns with core of high-strength concrete-filled steel tube,and the results are compared with those obtained by the existing methods.It is indicated that the calculated results accord well with the experimental ones,and that the proposed method is superior to the exis-ting methods because it can reasonably estimate the axial bearing capacity of composite columns with core of high-strength concrete-filled steel tube.

Key words: concrete-filled steel tube, composite column, confinement effect, axial bearing capacity