Improving interface bonding of double-skinned CFST columns

Dong, Chunxiao and Ho, Johnny Ching Ming (2013) Improving interface bonding of double-skinned CFST columns. Magazine of Concrete Research, 65 20: 1199-1211. doi:10.1680/macr.13.00041

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Author Dong, Chunxiao
Ho, Johnny Ching Ming
Title Improving interface bonding of double-skinned CFST columns
Journal name Magazine of Concrete Research   Check publisher's open access policy
ISSN 0024-9831
1751-763X
Publication date 2013-10
Year available 2013
Sub-type Article (original research)
DOI 10.1680/macr.13.00041
Open Access Status File (Publisher version)
Volume 65
Issue 20
Start page 1199
End page 1211
Total pages 13
Place of publication London, United Kingdom
Publisher I C E Publishing
Collection year 2014
Language eng
Formatted abstract
It has been demonstrated that high-strength concrete (HSC) is able to improve the strength-to-weight ratio of
reinforced concrete columns and maximise the usable areas of tall buildings. However, closely spaced transverse
reinforcement needs to be installed to provide stronger confinement for averting brittle failure of HSC. To resolve the
problem, double-skinned concrete-filled-steel-tubular (CFST) columns have been advocated, which eliminates the steel
congestion problem for better concrete placing and reduces the concrete arching action thus providing a more uniform
confining pressure. Despite these advantages, a major shortcoming of double-skinned CFST columns is that imperfect
interface bonding occurs in the elastic stage that reduces elastic strength and stiffness. Thus, the authors proposed to
adopt external confinement to restrict the lateral dilation of the outer tube of double-skinned CFST columns. To verify
the effectiveness of the proposed external rings, a total of 20 double-skinned normal- and high-strength CFST columns
were tested. From the test results, it was observed that the stiffness, axial load-carrying capacity and ductility of ringconfined
double-skinned CFST columns were significantly higher than the unconfined columns.
Keyword High Strength Concrete
Steel Tubular Columns
Axial Load Behavior
High Performance Concrete
Filled Tube Columns
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2014 Collection
 
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