Experimental Investigation of Exterior RC Beam-Column Joints Retrofitted with FRP Systems
Publication: Journal of Composites for Construction
Volume 18, Issue 4
Abstract
Premature brittle failures because of seismic actions strongly affect the behavior of existing reinforced concrete (RC) structural systems. They commonly involve exterior beam-column joints of structures designed without transverse reinforcement. This paper investigates the behavior of unconfined joints that do not conform to current seismic codes and the effectiveness of externally bonded fiber-reinforced polymers (FRPs) as a strengthening technique. It presents an experimental program carried out on six full-scale RC corner joints under constant axial load and transverse cyclic loading in the as-built and FRP-strengthened configuration. After describing the specimen design strategy and test setup, seismic performance is compared. Particular attention is paid to comparing the experimental capacity of as-built joints and the capacity, which can be predicted on the basis of models available in the literature. Finally, a discussion on the effectiveness of different FRP-strengthening layouts is reported.
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Acknowledgments
This study was performed in the framework of PE 2010–2013 joint program DPC Reluis Task 2.1.1: Reinforced Concrete Structures. The materials used for the strengthening of specimens were provided by Mapei SpA, Milan.
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Published In
Journal of Composites for Construction
Volume 18 • Issue 4 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 22, 2013
Accepted: Nov 26, 2013
Published online: Jan 20, 2014
Discussion open until: Jun 20, 2014
Published in print: Aug 1, 2014
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