Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75892
Title: Mitigation of intermediate crack debonding in FRP-plated RC beams using FRP U-jackets
Authors: Fu, B 
Chen, GM
Teng, JG 
Keywords: FRP
Flexural strengthening
RC beam
Debonding
U-jacketing
Issue Date: 2017
Publisher: Elsevier
Source: Composite structures, 2017, v. 176, p. 883-897 How to cite?
Journal: Composite structures 
Abstract: Intermediate crack debonding (i.e., IC debonding) is a common failure mode of reinforced concrete (RC) beams flexurally strengthened with a fiber-reinforced polymer (FRP) plate. Due to IC debonding failure, the tensile strength of the FRP plate cannot be fully utilized. While a number of options to suppress this failure mode have been explored, the easiest option is still to install U-jackets of an appropriate layout outside the FRP plate. This paper presents the results of an experimental study into the effectiveness of such U-jacketing on delaying or suppressing IC debonding failure, an issue which has not yet been systematically investigated so far. Eight large-scale RC beams were tested in the present study to investigate the effects of different forms of FRP U-jacketing on IC debonding failure. The test results indicated that vertical FRP U-jackets have a rather limited effect on IC debonding failure. Moreover, strong vertical FRP U-jackets may cause significant out-plan bending in the soffit plate during the deformation process of the beam, leading to the premature rupture of the FRP soffit plate. The tests also showed that inclined U-jacketing is much more effective than vertical U-jacketing, particularly when inclined U-jacketing is provided in a low moment region.
URI: http://hdl.handle.net/10397/75892
ISSN: 0263-8223
EISSN: 1879-1085
DOI: 10.1016/j.compstruct.2017.05.049
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