Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5404
Title: Shear strength model for FRP-strengthened RC beams with adverse FRP-steel interaction
Authors: Chen, GM
Teng, JG 
Chen, JF
Keywords: Fiber reinforced polymer
Reinforced Concrete
Concrete beams
Bonding
Shear failures
Shear resistance
Shear strength
Issue Date: 28-May-2012
Publisher: American Society of Civil Engineers
Source: Journal of composites for construction, 28 May 2012, v. 17, no. 1, p. 50-66 How to cite?
Journal: Journal of composites for construction 
Abstract: RC beams shear‐strengthened with externally‐bonded FRP U‐strips or side strips usually fail due to debonding of the bonded FRP shear reinforcement. Because such debonding usually occurs in a brittle manner at relatively small shear crack widths, some of the internal steel stirrups intersected by the critical shear crack may not have reached yielding at beam shear failure. Consequently, the yield stress of internal steel stirrups in such a strengthened RC beam cannot be fully utilized. This adverse shear interaction between the internal steel shear reinforcement and the external FRP shear reinforcement may significantly reduce the benefit of the shear‐strengthening FRP but has not been considered explicitly by any of the shear strength models in the existing design guidelines. This paper presents a new shear strength model considering this adverse shear interaction through the introduction of a shear interaction factor. A comprehensive evaluation of the proposed model, as well as three other shear strength models, is conducted using a large test database. It is shown that the proposed shear strength model performs the best among the models compared, and the performance of the other shear strength models can be significantly improved by including the proposed shear interaction factor. Finally, a design recommendation is presented.
URI: http://hdl.handle.net/10397/5404
ISSN: 1090-0268
EISSN: 1943-5614
DOI: 10.1061/(ASCE)CC.1943-5614.0000313
Rights: Copyright 2012 by the American Society of Civil Engineers
This is the author’s version of a work that was accepted for publication in Journal of Composites for Construction. The open URL of the article: http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000313
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