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Computers and Concrete
  Volume 28, Number 2, August 2021 , pages 137-147

Numerical finite element study of strengthening of damaged reinforced concrete members with carbon and glass FRP wraps
Mehdi Ebadi-Jamkhaneh, Amir Homaioon-Ebrahimi and Denise-Penelope N. Kontoni

    Concrete spalling is considered as one of the most common weaknesses phenomena in concrete members. In this article, reinforced concrete (RC) column and beam members are subject to a variety of loads under damaged and strengthened conditions using carbon and glass fiber reinforced polymer (FRP) wraps. The main parameters in this study include the number of the FRP layers, the materials of the strengthening FRP layers, and the loading types. The imposed loads include pure bending moment, shear, and pure torsional moment, to enable studying the structural elements's behaviors under such states. The numerical finite element (FE) model was verified using experimental results, and 10 different case numerical FE models were analyzed. The analysis results demonstrated that using an FRP layer increases the shearing and torsional capacities. Adding another FRP layer does not significantly affect the models' behavioral specifications. In both RC beam and column, this strengthening method did not affect the torsional capacity, while managed to prevent sudden capacity loss and enhance ductility.
Key Words
    carbon fiber reinforced polymer (CFRP); damaged reinforced concrete; finite element modeling; glass fiber reinforced polymer (GFRP); strengthening; torsional loading
Mehdi Ebadi-Jamkhaneh: Department of Civil Engineering, School of Engineering, Damghan University, Damghan, Iran
Amir Homaioon-Ebrahimi: Department of Civil Engineering, School of Engineering, University of Birmingham, Birmingham, UK
Denise-Penelope N. Kontoni: Department of Civil Engineering, School of Engineering, University of the Peloponnese, GR-26334 Patras, Greece; School of Science and Technology, Hellenic Open University, GR-26335 Patras, Greece

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