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Numerical study on interaction between steel stirrups and shear- strengthening NSM FRP strips in RC beams

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conference contribution
posted on 2024-07-11, 14:10 authored by G. M. Chen, S. W. Li, S. S. Zhang, Jue Chen, J. G. Teng
RC beams shear-strengthened with externally bonded or near-surface mounted (NSM) FRP reinforcement usually fail by the debonding of FRP in a brittle manner. When the FRP reinforcement debonds, the internal steel stirrups may have not reached their yield strength, so the contribution of the latter to the shear resistance of the beam is compromised to some extent. This phenomenon is referred to as the adverse shear interaction between the steel stirrups and the bonded FRP shear reinforcement. This paper examines such shear interaction in RC beams shear strengthened with NSM FRP strips using a simple computational model. Numerical results obtained from this model show that in such beams, most of the steel stirrups reach their yield strength, so the interaction does not have a significant adverse effect on the shear resistance of the beam. This may be seen as yet another advantage of the NSM FRP strengthening method.

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PDF (Published version)

ISBN

9780987593016

Journal title

4th Asia-Pacific Conference on FRP in Structures (APFIS 2013), Melbourne, Australia, 11-13 December 2013

Conference name

4th Asia-Pacific Conference on FRP in Structures APFIS 2013, Melbourne, Australia, 11-13 December 2013

Publisher

Swinburne University of Technology

Copyright statement

Copyright © 2013 International Institute for FRP in Construction. The published version is reproduced with the permission of the copyright owner.

Language

eng

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