CFRP Anchor for Preventing Premature Debonding of Externally Bonded FRP Laminates from Concrete
Publication: Journal of Composites for Construction
Volume 17, Issue 5
Abstract
To delay or prevent debonding of externally bonded fiber-reinforced polymer (FRP) laminate from concrete substrate, a new carbon FRP (CFRP) anchor is developed. The monolithically built anchor comprises two legs and a wide head plate, with the legs inserted into adhesive-filled drilled holes in the concrete and the head plate bonded to the surface of the FRP laminate and the adjacent concrete. Full-scale reinforced concrete T-beams were strengthened in flexure with different amounts of CFRP laminate and tested in four-point bending. The anchor number and spacing were varied to find the most effective configuration. It was determined that the configuration involving nearly uniform spacing of the anchors along the laminate and the placement of the laminate strips between the anchor legs were most effective to allow beams with up to eight plies of the laminate to fail by rupture of FRP rather than debonding. When comparing the efficiency factor of the proposed anchor with those of other anchors reported in the literature, it was found to have the highest efficiency factor.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 17 • Issue 5 • October 2013
Pages: 641 - 650
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 30, 2012
Accepted: Mar 22, 2013
Published online: Sep 16, 2013
Published in print: Oct 1, 2013
Discussion open until: Feb 16, 2014
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