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Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Gora, Abdurra'uf Mukhtar; Jaganathan, Jayaprakash; Amwar, M. P.; Leung, H. Y.


Abdurra'uf Mukhtar Gora

Jayaprakash Jaganathan

M. P. Amwar

H. Y. Leung


Advanced fibre reinforced polymer (FRP) composites have been increasingly used over the last two decades for strengthening, upgrading, and restoring degraded civil engineering infrastructure. Substantial experimental investigations have been conducted in recent years to understand the compressive behaviour of FRP-confined concrete columns. A considerable number of confinement models to predict the compressive behaviour of FRP strengthened concrete columns have been developed from the results of these experimental investigations. The purpose of this paper is to present a comprehensive review of experimental investigations and theoretical models of circular and non-circular concrete columns confined with FRP reinforcement.
The paper reviews previous experimental test results on circular and non-circular concrete columns confined with FRP reinforcement under concentric and eccentric loading conditions and highlights the behaviour and mechanics of FRP confinement in these columns. The paper also reviews existing confinement models for concrete columns confined with FRP composites in both circular and non-circular sections.
This paper demonstrates that the performance and effectiveness of FRP confinement in concrete columns have been extensively investigated and proven effective in enhancing the structural performance and ductility of strengthened columns. The strength and ductility enhancement depend on the number of FRP layers, concrete compressive strength, corner radius for non-circular columns, and intensity of load eccentricity for eccentrically loaded columns. The impact of existing theoretical models and directions for future research are also presented.
Potential researchers will gain insight into existing experimental and theoretical studies and future research directions.


Gora, A. M., Jaganathan, J., Amwar, M. P., & Leung, H. Y. (2019). Experimental studies and theoretical models for concrete columns confined with FRP composites: a review. World Journal of Engineering, 16(4), 509-525.

Journal Article Type Article
Acceptance Date May 31, 2018
Publication Date Jun 12, 2019
Deposit Date Jun 1, 2018
Publicly Available Date Jun 12, 2019
Journal World Journal of Engineering
Print ISSN 1708-5284
Electronic ISSN 1708-5284
Publisher Emerald
Peer Reviewed Peer Reviewed
Volume 16
Issue 4
Pages 509-525
Keywords FRP composites; Circular and noncircular columns; Confinement; Stress-strain model
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