Strengthening of Reinforced Concrete Beams Weak in Shear Using GFRP

  • Authors

    • Qudhan Shaik
    • P Polu Raju
    2018-04-18
    https://doi.org/10.14419/ijet.v7i2.20.16723
  • Retrofitting, Shear behavior, Shear reinforcement, GFRP Strips, Crack Pattern.

  • Abstract

    Due to lateral forces acting on the structure, stresses are generated in the beam which causes beam failure. To overcome those stresses in the existing structures, retrofitting is one of the techniques to increase the lateral strength. In this study, an experimental investigation was done on RC beams to check the shear behavior by comparing control RC beams with strengthened RC beams. To observe the shear behavior considered RC Beams were made weak in shear and then Retrofitted. Two sets of beams were considered, out of which, set-1 consists of three control specimens with shear reinforcement of 100%, 50%, and 30%. Set-2 consists of three retrofitted specimens with GFRP Strips with shear reinforcement of 100%, 50%, and 30%. GFRP strips were provided around the beam with different spacing. The results concluded that the retrofitted specimens have more load carrying capacity compared to control specimens. Thus, the retrofitting is a feasible solution to overcome the stresses developed in the structure. The study also involves the behavior of shear having several GFRP layers and orientation of ultimate load carrying capacity, failure mode and crack pattern of the beam are also investigated.

     

     

  • References

    1. [1] Raju, S ,†Review on Shear Behaviour of Reinforced Concrete Beam without Transverse Reinforcementâ€, International Journal of Engineering Research and Applications (IJERA), 4(4), pp.116-121, 2014., available online: http://www.ijera.com/papers/Vol4_issue4/Version%208/W04408116121.pdf

      [2] Samad, A.A.A., Ali, N., Mohamad, N., Jayaprakash, J., Tee, K.F. and Priyan, M.†Shear Strengthening and Shear Repair of 2-Span Continuous RC Beams with CFRP Stripsâ€, Journal of Composite Construction, (ASCE), 21(3), pp.1-12, 2017.http:// https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29CC.1943-5614.0000756

      [3] Sundarraja, M. C. and Raja Mohan, S. “– An Experimental Study Shear Strengthening of RC Beams Using GFRP Vertical Stripsâ€, Journal of Reinforced Plastics and Composites, 27(14), pp.1477-1495, 2015.

      [4] Sundarraja, M. C. and Rajamohan, S. “Strengthening of RC beams in shear using GFRP inclined strips – An experimental studyâ€, Construction and Building Materials, 23(2), pp.856-864, 2009.

      [5] Raju, A. and Raju, L. A. “Retrofitting of RC Beams Using FRPâ€, International Journal of Engineering Research & Technology (IJERT), 2(1), pp.1-6, 2013.

      [6] Franklin, J. J. and Catherine, M. G. “Retrofitting of RC Beam using Glass Fiber Reinforced Polymer Compositeâ€, International Journal of Engineering Research & Science (IJOER), 2(5), pp.124-132, 2016.

      [7] Rohit, V. and Mandeep, K. “Retrofitting of RC Beams using Glass Fiber Reinforced Polymer Sheets: an Experimental Studyâ€, Indian Journal of Science and Technology, 9(44), pp.1-11, 2016.

      [8] Liu, T. and Xiao, Y. “RC Impact Behaviour of CFRP-Strip-Wrapped Beams without Stirrupsâ€, Journal of composites for construction (ASCE), 21(5), pp.1-14, 2017.

      [9] Hussein, M., Afefy, H. M. E. and Khalil, A-H. A-K. “Innovative Repair Technique for RC Beams Predamaged in Shearâ€, Journal of Composites for Construction, 17(6), pp. 1-8, 2013.

      [10] IS 456:2000, “Plain and Reinforced Concrete-Code of Practice†Bureau of Indian standards, New Delhi.

      [11] IS 10262:2009, “Concrete Mix Proportioning - Guidelines†Bureau of Indian standards, New Delhi.

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  • How to Cite

    Shaik, Q., & Polu Raju, P. (2018). Strengthening of Reinforced Concrete Beams Weak in Shear Using GFRP. International Journal of Engineering & Technology, 7(2.20), 306-312. https://doi.org/10.14419/ijet.v7i2.20.16723

    Received date: 2018-08-03

    Accepted date: 2018-08-03

    Published date: 2018-04-18