Flexural ductility of high-strength concrete columns with minimal confinement

Lam, J. Y. K., Ho, J. C. M. and Kwan, A. K. H. (2009) Flexural ductility of high-strength concrete columns with minimal confinement. Materials and Structures, 42 7: 909-921. doi:10.1617/s11527-008-9431-5


Author Lam, J. Y. K.
Ho, J. C. M.
Kwan, A. K. H.
Title Flexural ductility of high-strength concrete columns with minimal confinement
Journal name Materials and Structures   Check publisher's open access policy
ISSN 1359-5997
1871-6873
Publication date 2009
Year available 2009
Sub-type Article (original research)
DOI 10.1617/s11527-008-9431-5
Open Access Status
Volume 42
Issue 7
Start page 909
End page 921
Total pages 13
Place of publication Dordrecht, The Netherlands
Publisher Springer Netherlands
Collection year 2009
Language eng
Subject 2215 Building and Construction
2205 Civil and Structural Engineering
2211 Mechanics of Materials
2500 Materials Science
Abstract The use of high-strength concrete (HSC) instead of normal-strength concrete (NSC) in columns has the advantage of allowing the column size to be reduced and is thus becoming popular. However, since HSC is more brittle than NSC, its use could result in undesirable brittle failure. To evaluate the ductility of columns, nonlinear moment-curvature analysis taking into account the stress-path dependence of the steel reinforcement is required. Based on such analysis, a parametric study has been conducted to investigate the effects of various factors on the ductility of columns. The results revealed that the effect of concrete strength is dependent on the axial stress level (axial load to area ratio) and axial load level (axial load to capacity ratio). At the same axial stress level, the use of HSC has little or basically no adverse effect on the ductility but if the same axial load level is maintained to reduce the column size, the use of HSC would significantly reduce the ductility. Finally, two formulas for direct evaluation of the ductility of columns are developed.
Keyword Columns
Flexural ductility
High strength concrete
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Thu, 23 Oct 2014, 17:56:52 EST by Johnny Ho on behalf of School of Civil Engineering