Flexural Behaviour of RC beams using GFRP Composites

  • Authors

    • S Sivasankar
    • T Bharathy
    • R Vinodh Kumar
    2018-07-20
    https://doi.org/10.14419/ijet.v7i3.12.16493
  • Reinforced Concrete, GFRP sheets, strengthening, wrapping, Flexural behaviour, Ultimate load carrying capacity.

  • Reinforced Concrete (RC) structures damaged by sudden accidental loads due to earthquake and severe environmental exposure. Traditional strengthening methods are not meeting the service life of the structure for long time. Recently, FRP strengthening is used successfully in all kind of exposure with minimum cost and less duration. In this paper RC beams were strengthened by GFRP sheets in two different orientations. Two specimens are control beams, two specimens are wrapped with U wrapping and the remaining beams are bottom wrapping. The size of the beam is 1700mm long, 150mm  wide and 250mm depth. The test specimens consit of 2 nos of 10mm dia rods as longitudinal reinforcement in compression zone and 2 nos of 10mm dia steel rods in tension zone. 2-legged stirrups of 8mm diameter were used with a centre-to-centre spcaing of 150mm. All beams were tested under four-point loading. Experiments will be undertaken until beams fails so that the influence of GFRP characteristics on the Flexural behaviour of beams which includes Flexural behaviour, Ultimate load carrying capacity, Deformation and Stress-strain behaviour. Evaluation of the results will lead to optimum GFRP jacketing /wrapping arrangements for the concrete beams are considered here.

     

  • References

    1. [1] Mander, JB, Priestly, MJN & Park, R 1987, ‘Theoretical stress-strain model for confined concrete’, Journal of Structural Engineering, vol. 114, no.8, pp.1804- 1826.

      [2] Nanni, A & Bradford, NM 1995, ‘FRP jacketed concrete under uniaxial compression’, Construction and Building Materials, vol. 9, no. 2, pp. 115-124.

      [3] Mirmiran, A &Shahawy, M 1997, ‘Behaviour of concrete confined by fibre composites’, Journal of Structural Engineering, vol. 123, no. 5, pp. 583-590.

      [4] Saadatmanesh, H, Ehsani, MR & Li, MW 1994, ‘Strength and ductility of concrete columns externally reinforced with fiber composite straps’, ACI Structural Journal, vol. 91, no. 4, pp. 434-447.

      [5] Gillespie, JW, Mertz, DR, Kasai, K, Edberg, WM, Demitz, JR & Hodgson, I 1996, ‘Rehabilitation of steel bridge girders: Large scale testing’, Proceeding of the American society for composites eleventh technical conference on composite materials, pp. 231-240.

      [6] Tavakkolizadeh, M &Saadatmanesh, H 2001, ‘Repair of cracked steel girders using CFRP sheets’, Proc. ISEC-01, Hawaii, pp. 24-27.

      [7] Tavakkolizadeh, M &Saadatmanesh, H 2003, ‘Strengthening of steel-concrete composite girders using carbon fiber reinforced polymers sheets’, Journal of Structural Engineering, vol. 129, pp. 30-39.

      [8] Miller, TC, Chajes, MJ, Mertz, DR & Hastings, JN 2001, ‘Strengthening of a steel bridge girder using CFRP plates’, ASCE Journal of Bridge Engineering, vol. 6,

      [9] Jiao, H & Zhao, XL 2004, ‘CFRP strengthened butt-welded very high strength (VHS) circular steel tubes’, Thin-Walled Structures, vol. 42, pp. 963-978.

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  • How to Cite

    Sivasankar, S., Bharathy, T., & Vinodh Kumar, R. (2018). Flexural Behaviour of RC beams using GFRP Composites. International Journal of Engineering & Technology, 7(3.12), 744-749. https://doi.org/10.14419/ijet.v7i3.12.16493