Modified Push-Off Testing of an Inclined Shear Plane in Reinforced Concrete Strengthened with CFRP Fabric
Publication: Journal of Composites for Construction
Volume 20, Issue 3
Abstract
This study reports the findings of an experimental investigation into the behavior of an inclined shear plane in reinforced concrete, such as a diagonal crack in the web of a beam, strengthened with externally bonded carbon fiber–reinforced polymer (CFRP) fabric. A modified push-off test of novel geometry was developed for this study. This test generates a diagonal failure plane subject to combined shear and tension. Both unwrapped and wrapped tests were conducted, allowing the load sharing and load-displacement behavior of the reinforced concrete, and the reinforced concrete with externally bonded CFRP fabric, to be investigated. Fully wrapped and U-wrapped CFRP fabric configurations were tested. Results indicate that for the arrangement tested, concrete, steel, and CFRP contributions to resistance are not independent, and that effective anchorage lengths given in the United Kingdom and United States guidance for U-wrapped CFRP may not be adequate in some cases.
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Acknowledgments
The authors wish to gratefully acknowledge the financial support of the U.K. Engineering and Physical Sciences Research Council (EPSRC) through grant EP/I018972/1. The authors also wish to extend their sincere thanks to Jan Nilsson, Martin Touhey, and the staff of the University of Cambridge’s Structures Research Lab for their invaluable assistance in carrying out the experimental program previously reported. Additional data related to this publication is available at the University of Cambridge’s institutional data repository: https://www.repository.cam.ac.uk/handle/1810/249023.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 20 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 25, 2015
Accepted: Jul 27, 2015
Published online: Sep 30, 2015
Discussion open until: Feb 29, 2016
Published in print: Jun 1, 2016
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