Finite element analysis of concrete-filled steel tube (CFST) columns with circular sections under eccentric load

Ouyang, Y., Kwan, A. K. H., Lo, S. H. and Ho, J. C. M. (2017) Finite element analysis of concrete-filled steel tube (CFST) columns with circular sections under eccentric load. Engineering Structures, 148 387-398. doi:10.1016/j.engstruct.2017.06.064


Author Ouyang, Y.
Kwan, A. K. H.
Lo, S. H.
Ho, J. C. M.
Title Finite element analysis of concrete-filled steel tube (CFST) columns with circular sections under eccentric load
Journal name Engineering Structures   Check publisher's open access policy
ISSN 0141-0296
1873-7323
Publication date 2017-10-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.engstruct.2017.06.064
Open Access Status Not yet assessed
Volume 148
Start page 387
End page 398
Total pages 12
Place of publication Kidlington, Oxford, United Kingdom
Publisher Elsevier
Language eng
Abstract The casting of concrete in concrete-filled steel tube (CFST) can, via the confinement effect of the steel tube, significantly increase the ductility of the concrete and, in the case of high-strength concrete (HSC), alleviate the shortfall in ductility of the HSC. This kind of structure is gaining popularity but its behaviour is quite complicated. In an axially loaded circular CFST column, the confinement is uniform and equi-biaxial (isotropic within the cross-section). But, when the circular CFST column is under eccentric load, the confinement becomes non-uniform and anisotropic. Such complicated confinement effect is not easy to analyse and for such analysis, a rigorous finite element (FE) method is generally needed. In this paper, a new FE model considering the lateral strain-axial strain relation of the confined concrete covering the full range from the initial elastic stage to the inelastic stage is developed for the analysis of circular CFST columns under eccentric load. The FE model is used to analyse a total of 95 CFST specimens tested by other researchers and the numerical results are compared to the published test results for verification. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword Concrete-filled steel tube (CFST)
Confinement effect
Finite element analysis
Stress-Strain Relationship
Performance-Based Analysis
Polymer-Confined Concrete
Tubular Beam-Columns
Cft Columns
Constitutive Model
Axial-Compression
Numerical-Model
Bending Moment
Part II
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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