RESEARCH ARTICLE


Study on Axial Compressive Behaviors and Bearing Capacity Formulas of the Composite CFST Columns



Yufen Zhang*, Qiang Wang
School of Civil Engineering, North China University of Technology, Beijing, P.R. China, 100144


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Creative Commons License
© 2017 Zhang and Wang.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Civil Engineering, North China University of Technology, Beijing, 100144, China; Tel: +86 010 88803940; E-mail: yufenzh@gmail.com


Abstract

Introduction:

With stronger confinement effects, the composite CFST column exhibits higher ultimate bearing capacity and better seismic performance than ordinary CFST column, so it has a broad application prospect in the field of structural engineering.

Methods:

This paper summarized recent researches on the axial compressive behavior of two typical composite CFST columns including the section of outer square tube-inner circular tube and the section of double circular tubes. Parameter analysis on axial compressive behavior was presented in detail according to all the experimental and theoretical results of the composite CFST columns.

Result and Conclusion:

The different axial compression ultimate bearing capacity formulas were compared based on the experimental results. Simultaneously, the insufficiencies of present work were pointed out. Lastly, suggestions for further study in this field were put forward.

Keywords: Composite CFST columns, Axial compressive behavior, Bearing capacity formula, Confinement coefficient, Parameter analysis, Reinforced.