Investigation into the Effect of Bonding on FRP-Wrapped Cylindrical Concrete Columns
Publication: Journal of Composites for Construction
Volume 14, Issue 6
Abstract
In this paper the failure of a three layer system comprising a concrete column, an intermediate epoxy layer, and fiber-reinforced polymer (FRP) confinement is investigated. We perform a series of numerical experiments to investigate how the failure loads and ultimate strains of axially loaded plain cement concrete (PCC) and reinforced cement concrete (RCC) columns change with the type of the bond between concrete and epoxy and between epoxy and FRP. Three types of interfacial behavior are considered: rigid, cohesive compliant, and unbonded contact. An idealized spring model for the resultant confinement stiffness is used to explain the effect the nature of the bond has on the results. It is found that the type of bond has a significant effect on the ultimate strength of PCC columns. The results also indicate that the presence of longitudinal and hoop steel reinforcement allows use of comparatively less stiff FRP sheets as confinement material for RCC columns.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 6 • December 2010
Pages: 706 - 719
Copyright
© 2010 ASCE.
History
Received: Sep 9, 2009
Accepted: May 7, 2010
Published online: May 12, 2010
Published in print: Dec 2010
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