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Finite Element Analysis of RC Beams Strengthened in Shear with NSM FRP Rods

  • Akram R. Jawdhari
  • Ali Hadi Adheem
Conference paper

Abstract

This study presents three-dimensional FE models on RC T-beams strengthened in shear with near-surface mounted (NSM) fiber-reinforced polymer (FRP) rods, with various rod spacing, strengthening pattern, and internal shear reinforcement ratios. The FE models utilized different constitutive material relations for concrete, steel, and FRP and implemented a mixed-mode bond-slip law at the NSM FRP rod-concrete interface. Comparisons, such as ultimate loads and load-deflection history, validated the accuracy of the developed models. More importantly, the FE models were able to predict the brittle shear failure of the beams and debonding of the NSM rods. For an accurate simulation of shear failure, the shear retention factor (β) should be less than 0.2. The correlated models will be used in further research to examine the effects of various parameters expected to influence the behavior of the retrofitted beams, in an effort to strengthen the knowledge on this topic.

References

  1. 1.
    Teng, J. G., Lam, L., & Chen, J. F. (2004). Shear strengthening of RC beams with FRP composites. Progress in Structural Engineering and Materials, 6, 173–184.  https://doi.org/10.1002/pse.179.CrossRefGoogle Scholar
  2. 2.
    Chen, J. F., & Teng, J. G. (2003). Shear capacity of FRP strengthened RC beams: Fibre reinforced polymer rupture. ASCE Journal of Structural Engineering, 129(5), 615–625. [14 February 2001].CrossRefGoogle Scholar
  3. 3.
    Lee, T. K., & Al-Mahaidi, R. S. H. (2003). Strength and failure mechanism of RC T-beams strengthened with CFRP plates. Proceedings of the 6th international symposium on FRP reinforcement for concrete structures, Singapore (pp. 247–256).Google Scholar
  4. 4.
    Khalifa, A., & Nanni, N. (2000). Improving shear capacity of existing RC T-section beams using CFRP composites. Cement and Concrete Composites, 22(3), 165–174. ISSN 0958-9465.CrossRefGoogle Scholar
  5. 5.
    Triantafillou, T. C. (1998). Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites. ACI Structural Journal, 95(2), 107–115.Google Scholar
  6. 6.
    Adhikary, B. B., & Mutsuyoshi, H. (2004). Behavior of concrete beams strengthened in shear with carbon-fiber sheets. ASCE Journal of Composites for Construction, 8(3), 2004.CrossRefGoogle Scholar
  7. 7.
    El-Hacha, R., & Rizkalla, S. (2004). Near-surface-mounted fiber reinforced polymer reinforcements for flexural strengthening of concrete. ACI Structural Journal, 101(5), 717–726.Google Scholar
  8. 8.
    Al-Mahmoud, F., Castel, A., François, R., & Tourneur, C. (2010). RC beams strengthened with NSM CFRP rods and modeling of peeling-off failure. Composite Structures, 92, 1920–1930.CrossRefGoogle Scholar
  9. 9.
    Al-Mahmoud, F., Castel, A., Minh, T. Q., & François, R. (2015). Reinforced concrete beams strengthened with NSM CFRP rods in shear. Advances in Structural Engineering, 18(10), 1563–1574.CrossRefGoogle Scholar
  10. 10.
    Barros, J., & Dias, S. J. E. (2003). Shear strengthening of reinforced concrete beams with laminate strips of CFRP. Proceedings of the international conference composites in constructions CCC2003, Cosenza (pp. 289–294).Google Scholar
  11. 11.
    Jalali, M., Sharbatdar, M. K., Chen, J. F., & Alaee, F. J. (2012). Shear strengthening of RC beams using innovative manually made NSM FRP bars. Construction and Building Materials, 36, 990–1000. ISSN 0950-0618.CrossRefGoogle Scholar
  12. 12.
    De Lorenzis, L., & Nanni, A. (2001). Strengthening of reinforced concrete beams with NSM fiber-reinforced polymer rods. ACI Structural Journal, 98(1), 60–68.Google Scholar
  13. 13.
    ANSYS. (2016). Release 17.2 documentation for ANSYS. Version 17.2. Canonsburg: ANSYS Inc..Google Scholar
  14. 14.
    Omran, H., & El-Hacha, R. (2012). Nonlinear 3D finite element modeling of RC beams strengthened with prestressed NSM-CFRP strips. Construction and Building Materials, 31, 74–85.CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil EngineeringQueens UniversityKingstonCanada
  2. 2.Kerbala Technical Institute, Al-Furat Al-Awsat Technical UniversityKerbalaIraq

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