Effectiveness of external confinement on the uni-axial behaviour of CFST columns

Lai, M. H. and Ho, J. C. M. (2015). Effectiveness of external confinement on the uni-axial behaviour of CFST columns. In: Dilum Fernando, Jin-Guang Teng and Jose L. Torero, Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015). International Conference on Performance-based and Life-cycle Structural Engineering, Brisbane, QLD, Australia, (689-696). 9-11 December 2015. doi:10.14264/uql.2016.425

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Author Lai, M. H.
Ho, J. C. M.
Title of paper Effectiveness of external confinement on the uni-axial behaviour of CFST columns
Conference name International Conference on Performance-based and Life-cycle Structural Engineering
Conference location Brisbane, QLD, Australia
Conference dates 9-11 December 2015
Proceedings title Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015)
Place of Publication Brisbane, QLD, Australia
Publisher School of Civil Engineering, The University of Queensland
Publication Year 2015
Sub-type Fully published paper
DOI 10.14264/uql.2016.425
Open Access Status File (Publisher version)
ISBN 9781742721477
Editor Dilum Fernando
Jin-Guang Teng
Jose L. Torero
Start page 689
End page 696
Total pages 8
Collection year 2016
Language eng
Formatted Abstract/Summary
Concrete-filled-steel-tube (CFST) columns are becoming increasingly popular owing to the superior behaviour contributed by the composite action. Previous experimental and theoretical studies have proved this composite action can be further improved by providing external confinement in the form of steel rings, tie bars, spirals or jackets. A theoretical model developed by the authors previously based on (1) an accurate hoop strain equation; (2) an actively confined concrete model; (3) a three-dimensional steel model; (4) Interaction of core concrete, steel tube and external confinement was adopted in this study to conduct a parametric study, which was aimed at investigating the effects of material strengths, geometric properties and external confinement (steel jackets) on the uni-axial behaviour of CFST columns. From the results in parametric study, it is shown that the maximum strength of CFST columns increases as the material strengths increase, or the diameter-to-thickness ratio of steel tube decreases. Moreover, it is also concluded that adding external confinement is more effective in improving the uni-axial behaviour of CFST columns than solely increasing the wall thickness of steel tube.

Keyword Concrete-filled-steel-tube
External confinement
Parametric study
Theoretical model
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Wed, 23 Dec 2015, 12:58:52 EST by Anthony Yeates on behalf of Faculty Of Engineering, Architecture & Info Tech