Progressive debonding in RC beams shear-strengthened with FRP side strips

J. F. Chen, G. M. Chen, Jinguang Teng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Almost all reinforced concrete (RC) beams shear-strengthened with externally bonded FRP strips on their sides fail in shear due to debonding of the FRP strips. The bond behaviour between the FRP strips and the concrete substrate therefore plays a crucial role in the failure process of these beams. Despite extensive research over the past decade, there is still a lack of rigorous modelling and understanding of how the debonding of the FRP strips in such a beam propagates and how the debonding process affects its shear behaviour. This paper presents an analytical study on the progressive debonding of FRP strips in such strengthened beams. The complete debonding process is modelled and the contribution of the FRP to the shear capacity of the beam is quantified. The validity of the analytical solution is verified by comparing its predictions with numerical results from a finite element analysis. This analytical treatment also represents a significant step forward in understanding how interaction between FRP strips, steel stirrups and concrete affects the shear resistance of an RC beam shear-strengthened with FRP.
Original languageEnglish
Title of host publicationAdvances and Trends in Structural Engineering, Mechanics and Computation - Proceedings of the 4th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2010
PublisherCRC Press/Balkema
Pages1197-1202
Number of pages6
ISBN (Print)9780415584722
Publication statusPublished - 1 Jan 2010
Event4th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2010 - Cape Town, South Africa
Duration: 6 Sep 20108 Sep 2010

Conference

Conference4th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2010
Country/TerritorySouth Africa
CityCape Town
Period6/09/108/09/10

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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