Skip to main content

Shear-strengthening of reinforced & prestressed concrete beams using FRP: Part I — Review of previous research


Fiber-Reinforced Polymers (FRP) are used to enhance the behavior of structural components in either shear or flexure. The research conducted in this paper was mainly focused on the shear-strengthening of reinforced and prestressed concrete beams using FRP. The main objective of the research was to identify the parameters affecting the shear capacity provided by FRP and evaluate the accuracy of analytical models. A review of prior experimental data showed that the available analytical models used to estimate the added shear capacity of FRP struggle to provide a unified design equation that can predict accurately the shear contribution of externally applied FRP. In this study, the ACI 440.2R-081 model and the model developed by Triantafillou and Antonopoulos2 were compared with the prior experimental data. Both analytical models failed to provide a satisfactory prediction of the FRP shear capacity. This study provides insights into potential reasons for the unsatisfactory prediction.


  1. ACI Committee 440, “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-08),” American Concrete Institute, Farmington Hills, MI, 2008, pp. 76.

  2. Triantafillou, T. C., and Antonopoulos, C. P., “Design of Concrete Flexural Members Strengthened in Shear with FRP,” ASCE Journal of Composites for Construction, Vol. 4, No. 4, 2000, pp. 198–205.

    Article  Google Scholar 

  3. Khalifa, A., and Nanni, A. “Rehabilitation of Rectangular Simply Supported RC Beams with Shear Deficiencies Using CFRP Composites,” Construction and Building Materials, Vol. 16, No. 3, 2002, pp. 135–146.

    Article  Google Scholar 

  4. Kansara, K. D., Ibell, T. J., Darby, A. P., and Everden, M., “Interpreting Conservativeness in Design Criteria for Flexural Strengthening of RC Structures Using Externally Bonded FRP,” International Journal of Concrete Structures and Materials, Vol. 4, No. 1, 2010, pp. 25–36.

    Article  Google Scholar 

  5. Bimal, B. A. and Hiroshi, M., “Behavior of Concrete Beams Strengthened in Shear with Carbon-Fiber Sheets,” ASCE Journal of Composites for Construction, Vol. 8, No. 3, 2004, pp. 258–264.

    Article  Google Scholar 

  6. Pellegrino, C. and Modena, C., “Fiber-Reinforced Polymer Shear Strengthening of Reinforced Concrete Beams With Transverse Steel Reinforcement,” Journal of Composites for Construction, Vol. 6, No. 2, 2002, pp. 104–111.

    Article  Google Scholar 

  7. Pellegrino, C. and Modena, C., “Fiber-Reinforced Polymer Shear Strengthening of Reinforced Concrete Beams: Experimental Study and analytical Modeling,” ACI Structural Journal, Vol. 103, No. 5, 2006, pp. 720–728.

    Google Scholar 

  8. Sim, J., Kim, G., Park, C., and Ju, M., “Shear Strengthening Effects with Varying Types of FRP Materials and Strengthening Methods,” ACI Special Publication, SP-230, 7th International Symposium on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures, 2005, pp. 1665–1680.

  9. Reed, E. and Peterman, J., “Evaluation of Prestressed Concrete Girders Strengthened with Carbon Fiber Reinforced Polymer Sheets,” ASCE Journal of Bridge Engineering, Vol. 9, No. 2, 2004, pp. 185–192.

    Article  Google Scholar 

  10. Russell, B., and Burns, N., “Design Guidelines for Transfer, Development, and Debonding of Large Diameter Seven Wire Strands in Pretensioned Concrete Girders,” Texas Department of Transportation in Cooperation with Federal Highway Administration, Research Report No. 1210-5F, 1993, pp. 464.

  11. Murphy, M., Belarbi, A., and Bae, W., “Shear Strengthening of Prestressed Concrete Girders with Externally Bonded CFRP Sheets,” Proceedings of 9th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures, Sydney, Australia, 2009.

  12. Bousselham, A. and Chaallal, O., “Shear Strengthening of Reinforced Concrete Beams with Fiber-Reinforced Polymer: Assessment of Influencing Parameters and Required Research,” ACI Structural Journal, Vol. 101, No. 2, 2004, pp. 219–227.

    Google Scholar 

  13. Sas, G., Täljsten, B., Barros, J., Lima, J., and Carolin, A., “Are Available Models Reliable for Predicting the FRP Contribution to the Shear Resistance of RC Beams?,” ASCE Journal of Composites for Construction, Vol. 13, No. 6, 2009, pp. 514–534.

    Article  Google Scholar 

  14. Ibrahim Ary, M., “Shear Strengthening of Prestressed Concrete I-Beams Using Carbon Fiber-Reinforced Polymers,” Master’s thesis, School of Civil Engineering and Environmental Science, The University of Oklahoma, Norman, 2011, pp. 96.

    Google Scholar 

  15. Triantafillou, T. C., “Shear Strengthening of Reinforced Concrete Beams Using Epoxy-Bonded FRP Composites,” ACI Structural Journal, Vol. 95, No. 2, 1998, pp. 107–115.

    Google Scholar 

  16. Belarbi, A., Bae, W., and Tumialan, R., “Toward Design Guidelines for Shear Strengthening of Concrete Structures Using Externally Bonded FRP Systems,” Proceedings of the Advanced Composites in Construction, University of Bath, Bath, United Kingdom, 2007.

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Thomas H. -K. Kang.

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and permissions

About this article

Cite this article

Ary, M.I., Kang, T.H.K. Shear-strengthening of reinforced & prestressed concrete beams using FRP: Part I — Review of previous research. Int J Concr Struct Mater 6, 41–47 (2012).

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: