Normal- and High-Strength Concrete Circular Elements Wrapped with FRP Composites
Publication: Journal of Composites for Construction
Volume 13, Issue 2
Abstract
Reinforced concrete columns usually have a minimum amount of transverse steel reinforcement this transverse reinforcement can have non negligible effects on the response of columns retrofitted with fiber-reinforced polymers (FRP). This paper presents a test program that was designed to study the behavior of small- and large-scale normal- and high-strength concrete circular columns confined with transverse steel reinforcement, FRP, and both transverse steel reinforcement and FRP under concentric loading. The effect of the main variables—such as the unconfined concrete strength, the volumetric ratio, the type and the yield strength of the transverse steel reinforcement, the concrete cover, and the number of FRP layers—are studied in this research program. The test results show that the enhancement of the confined concrete strength and strain is more pronounced in specimens with normal-strength concrete. It is also shown that the rupture of the FRP in the specimens with higher volumetric transverse steel reinforcement ratios corresponds to larger axial compressive strength and strain and that the postpeak behavior of these specimens is more ductile.
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Acknowledgments
This research was supported by the ISIS Canada Network of Centers of Excellence, the Natural Sciences and Engineering Research Council of Canada (NSERC), Ministère des Transports du Québec, and the CERIU. The technical assistance of Laurent Thibodeau, Claude Aubé, Sébastien Gauthier, and Marc Demers is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 2 • April 2009
Pages: 113 - 124
Copyright
© 2009 ASCE.
History
Received: Aug 31, 2007
Accepted: Oct 15, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
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