Recommended Guide Specification for the Design of Externally Bonded FRP Systems for Repair and Strengthening of Concrete Bridge Elements (2010) / Chapter Skim
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From page 12... ...
This approach was followed throughout the entire project and resulted in small data sets. Experimental data for various limit states governing the behavior of steel-reinforced concrete members with externally bonded FRP reinforcement are summarized in the following sections.
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Ratios of test to computed flexural strength for the limit state of debonding of FRP reinforcement.
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3.2.3 FRP Reinforcement End Peeling The reinforcement end of an externally bonded reinforcement system, when subjected to combined shear and flexure, may separate in the form of debonding in three different modes: (1) critical diagonal crack debonding with concrete cover separation (Yao and Teng 2007)
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, because of its simplicity for design purposes. Figure 3.5 shows evaluations of test results conducted on reinforced concrete beams reinforced with externally bonded FRP reinforcement (Yao and Teng 2007)
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, due to the lack of tensile diagonals. U-jacketing is the most common externally bonded shear strengthening method for reinforced concrete beams and girders (Figure 3.7)
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. 3.5 Seismic Retrofitting with Externally Bonded FRP Seismic retrofitting of existing reinforced concrete structural elements may be necessitated by the following: (a)
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Seismic strengthening examples: (a) shear strengthening of RC column, (b)
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