Experimental Investigation of FRP-Concrete Debonding under Cyclic Actions
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 4
Abstract
The effectiveness of externally bonded fiber-reinforced polymer (FRP) laminates for strengthening existing reinforced concrete (RC) structures is strictly related to the bond of the FRP reinforcement to the concrete substrate. Although numerous experimental studies have investigated this bond, experimental data concerning cyclic tests on both FRP sheets and plates applied on concrete specimens are still lacking. Thus, a series of single shear tests (SSTs) under both monotonic and cyclic actions, without inversion of sign, were performed on concrete prismatic specimens reinforced with carbon FRP (CFRP) sheets or plates. To evaluate and compare the influence of cyclic external actions on the bonding behavior of sheets and plate reinforcements, the results provided by monotonic and cyclic tests are reported and discussed in this paper. In particular, force-displacement relationships, axial strains, and shear stresses recorded along the FRP reinforcement are reported; the influence of the load path on the FRP debonding behavior is also examined.
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Acknowledgments
The experimental activities presented in the paper have been developed within the research work of “Laboratories University Network of Seismic Engineering”—ReLUIS (Research Line 8)—Executive Project 2005-2008.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 4 • April 2011
Pages: 360 - 371
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 22, 2008
Accepted: Sep 22, 2010
Published online: Sep 24, 2010
Published in print: Apr 1, 2011
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