A fracture-based model for FRP debonding in strengthened beams

Oguz Gunes, Oral Buyukozturk*, Erdem Karaca

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

This paper presents an experimental and analytical research study aimed at understanding and modeling of debonding failures in fiber reinforced polymer (FRP) strengthened reinforced concrete (RC) beams. The experimental program investigated debonding failure modes and mechanisms in beams strengthened in shear and/or flexure and tested under monotonic loading. A newly developed fracture mechanics based model considers the global energy balance of the system and predicts the FRP debonding failure load by characterizing the dominant mechanisms of energy dissipation during debonding. Validation of the model is performed using experimental data from several independent research studies and a design procedure is outlined.

Original languageEnglish
Pages (from-to)1897-1909
Number of pages13
JournalEngineering Fracture Mechanics
Volume76
Issue number12
DOIs
Publication statusPublished - Aug 2009
Externally publishedYes

Funding

The research work presented in this paper was funded by NSF under the project title “Failure Behavior of FRP Bonded Concrete Affected by Interface Fracture” through the research grant CMS 0010126 to Massachusetts Institute of Technology. The authors thank Dr. Christopher Leung at Hong Kong University of Science and Technology for generously making available the unpublished experimental data of his laboratory. The FRP materials used in the experimental program were donated by Sika Corporation.

FundersFunder number
National Science FoundationCMS 0010126

    Keywords

    • Beams
    • Debonding
    • Fracture
    • FRP
    • Strengthening

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