Theoretical analysis of post-peak flexural behaviour of normal- and high-strength concrete beams

Ho, J. C. M., Kwan, A. K. H. and Pam, H. J. (2003) Theoretical analysis of post-peak flexural behaviour of normal- and high-strength concrete beams. Structural Design of Tall and Special Buildings, 12 2: 109-125. doi:10.1002/tal.216


Author Ho, J. C. M.
Kwan, A. K. H.
Pam, H. J.
Title Theoretical analysis of post-peak flexural behaviour of normal- and high-strength concrete beams
Journal name Structural Design of Tall and Special Buildings   Check publisher's open access policy
ISSN 1541-7794
1541-7808
Publication date 2003-06
Year available 2003
Sub-type Article (original research)
DOI 10.1002/tal.216
Open Access Status Not yet assessed
Volume 12
Issue 2
Start page 109
End page 125
Total pages 17
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Abstract A new method of analysing the post-peak flexural behaviour of reinforced concrete beams has been developed and applied to normal- and high-strength concrete beams. It was revealed that at the post-peak stage the neutral axis depth keeps on increasing, and at a certain point the strain in the tension reinforcement starts to decrease, even though the curvature is increasing monotonically. Such strain reversal in the tension reinforcement occurs in all concrete beams and has significant effects on the post-peak behaviour and flexural ductility of concrete beams. Therefore, the stress path dependence of the tension reinforcement needs to be taken into account in the analysis. By means of a parametric study, the variation of ultimate concrete strain with tension steel ratio and the effects of various structural parameters on flexural ductility have been studied. Based on the numerical results, design values of ultimate concrete strain that are independent of tension steel ratio have been recommended and a simple formula for predicting the flexural ductility of reinforced normal- and high-strength concrete beams has been developed.
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, 18:06:34 EST by Johnny Ho on behalf of Learning and Research Services (UQ Library)