Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns

Ho, J. C. M., Lai, M. H. and Luo, L. (2014) Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns. Proceedings of the Institution of Civil Engineers: Structures and Buildings, Ahead of Print 1-14. doi:10.1680/stbu.13.00004

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Author Ho, J. C. M.
Lai, M. H.
Luo, L.
Title Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns
Journal name Proceedings of the Institution of Civil Engineers: Structures and Buildings   Check publisher's open access policy
ISSN 0965-0911
Publication date 2014-01-18
Year available 2014
Sub-type Article (original research)
DOI 10.1680/stbu.13.00004
Open Access Status File (Publisher version)
Volume Ahead of Print
Start page 1
End page 14
Total pages 14
Place of publication London, United Kingdom
Publisher I C E Publishing
Language eng
Formatted abstract
High-strength concrete (HSC) columns are usually provided with heavy confining steel within the potential plastic hinge region to restore flexural ductility. However, as the effectiveness of confining steel decreases with the concrete strength, the required confining steel content for high-strength concrete columns becomes very large, which causes steel congestion in the proximity of beam–column joints. A better method is to adopt a concrete-filled-steel-tube (CFST) column, which uses a hollow steel tube to confine high-strength concrete. Compared with ordinary reinforcement, concrete-filled-steel-tube columns provide a more uniform confining pressure to the concrete core and reduce steel congestion. Nonetheless, a major shortcoming of concrete-filled-steel-tube columns is that the imperfect interface bonding occurs at the elastic stage as steel dilates more than concrete in compression. This adversely affects the confinement of the steel tube and decreases the elastic strength and modulus. To resolve the problem, it is proposed in this study to use external steel confinement in the forms of rings and ties to restrict the dilation of the steel tube. For verification, a series of uniaxial compression tests on externally confined concrete-filled-steel-tube columns was performed. Theoretical models for predicting the uniaxial load-carrying capacity of ring-confined concrete-filled-steel-tube columns were also developed.
Keyword Design methods & aids
Composite structures
CFST columns
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 18 January 2014. Prepress title: "Uni-axial behaviour of high-strength CFST columns with external confinement".

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 10 times in Scopus Article | Citations
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Created: Thu, 13 Feb 2014, 23:32:07 EST by Julie Hunter on behalf of School of Civil Engineering