Shear strengthening of reinforced concrete members with CFRP sheets


  • A. Alzate Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Madrid; Universidad de Medellín, Medellín
  • A. Arteaga Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Madrid
  • A. de Diego Universidad de Medellín, Medellín
  • D. Cisneros Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Madrid
  • R. Perera Universidad Politécnica de Madrid



fibre-reinforced polymers (FRP), concrete, shear strengthening, experimental study


In light of their excellent mechanical properties and other advantages over conventional systems for repairing and rehabilitating structures, fibre-reinforced polymers (FRPs) are commonly used to enhance the shear strength of RC members. Because of the relatively recent application of the technique in civil engineering, however, it is addressed in very few recommendations or guides. While the design guides in place contain a single, well defined and generally accepted procedure for calculating bending moments, they collectively propose a wide variety of numerical models for shear, none of which is universally acknowledged. The present article focuses on the calculation of ultimate shear strength and describes an experimental study in that context conducted on reinforced concrete beams retrofitted with unidirectional carbon fibre reinforced polymer (CFRP) fabric.


Download data is not yet available.


(1) Federation Internationale du Béton (FIB): Externally bonded FRP reinforcement for RC structures, Technical Report, Task Group 9.3, Bulletin 14, Lausanne, Switzerland, 2001, pp. 59-68.

(2) CAN/CSA. Design and construction of building component with fiber-reinforced polymer. S806-02, Canadian Standards Association, Rexdale, Canada.

(3) Consiglio Nazionale delle Ricerche, Istruzioni per la Progettazione, l’Esecuzione ed il Controllo di Interventi di Consolidamento Statico mediante l’utilizzo di Compositi Fibrorinforzati. Roma, 13 luglio 2004, p.164.

(4) CIDAR. Design guideline for RC structures retrofitted with FRP and metal plates: Beams and slabs. Draft 3 - Submitted to standards Australia, CIDAR/CBIR, Australia, 2006.

(5) ACI 440.2R-08. Guide for the design, and construction of externally bonded FRP systems for strengthening of concrete structures, Reported by ACI Committee 440, 2008, pp. 32-34.

(6) Triantafillou T.: “Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites”, ACI Structural Journal, Vol. 95, nº 2 (1998), pp. 107-115.

(7) Khalifa A., Gold W., Nanni A., Abdel A.: “Contribution of externally bonded FRP to shear capacity of RC flexural members”, J. Compos. Constr., Vol. 2, nº 4 (1998), pp. 195-202.

(8) Teng J., Chen J., Smith S., Lam L.: FRP strengthened RC structures. UK, Wiley, 2002, pp. 245.

(9) Chen J., Teng J.: “Shear capacity of FRP-strengthened RC beams: FRP debonding”, Construction Building Materials, Vol. 17, nº 1 (2003), pp. 27-41.

(10) (10) Deniaud C., Cheng R.: “Reinforced Concrete T-Beams Strengthened in Shear with FRP Sheets”, J. Compos. Constr., Vol. 7, nº 2 (2003), pp. 302-310.

(11) Deniaud C., Cheng R.: “Simplified Shear Design Method for Concrete Beams Strengthened with FRP Sheets”, J. Compos. Constr., Vol. 8, nº 5 (2004), pp. 425-433.

(12) Pellegrino C., 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.

(13) Ianniruberto U., Imbimbo M.: “Role of fiber reinforced plastic sheet in shear response of reinforced concrete beams: experimental and analytical results”, J. Compos.Constr., Vol. 8, nº 5 (2004), pp. 415-424.

(14) Carolin A., Täljsten B.: “Theoretical study of strengthening for increased shear bearing capacity”, J. Compos. Constr., Vol. 9, nº 6 (2005), pp. 497-506.

(15) Cao S., Chen J., Teng J., Hao Z.: “Debonding in RC beams shear strengthened with complete FRP wraps”, J. Compos.Constr., Vol. 9, nº 5 (2005), pp. 417-428.

(16) Ye L., Lum X., Chen J.: “Design proposal for debonding strength of FRP strengthened RC beams in the Chinese Design Code”, Proceedings of International Symposium on Bond Behaviour of FRP in Structures, Hong Kong, China, (2005), pp. 55-62.

(17) Monti G., Liotta M.: “Test and design equations for FRP strengthening in shear”, Construction Building Materials, Vol. 21 (2007), pp. 799-809.

(18) Ahmad S., Shah A., Nawaz A., Salimullah K.: “Refuerzo a cortante de ménsulas con polímeros reforzados con fibra de carbono (CFRP)”, Materiales de Construcción, Vol. 60, nº 299 (2010), pp. 79-97.

(19) Chen M., Teng J., Chen J., Rosenboom O.: “Interaction between steel stirrups and shearstrengthening FRP strips in RC Beams”, J. Compos. Constr., Vol. 14, nº 5 (2010), pp. 498-509.

(20) Perera, R., Arteaga, A., de Diego, A.: “Artificial intelligence techniques for prediction of the capacity of RC beams strengthened in shear with external FRP reinforcement”, Composite Structures, Vol. 92 (2010), pp. 1169-1175.

(21) Perera, R., Barchín, M., Arteaga, A., de Diego, A.: “Prediction of the ultimate strength of reinforced concrete beams FRP-strengthened in shear using neural networks”, Composites: Part B, Vol. 41 (2010), pp. 287-298.

(22) European Committee for Standardization, Eurocode 2: Design of Concrete Structures, Part 1: General rules and rules for buildings, 2004, pp. 225.

(23) EHE-08. Instrucción de Hormigón Estructural, Ministerio de Fomento, 2008.

(24) Comite Euro-International du Beton. CEB-FIP Model Code 1990. V1, 2003.

(25) Murphy M., Belarbi A., Kuchma D.: “Shear design equations for concrete girders strengthened with FRP”, The international conference on FRP composites in civil engineering (CICE). Beijing, China, Vol. II (2010), pp.767-771.

(26) Mofidi A., Chaallal O.: “Shear strengthening of RC beams with EBR-FRP - influencing factors and conceptual debonding model”, J. Compos. Constr., Vol. 15, nº 1 (2011), pp. 62-74.

(27) Alzate A., Arteaga A., de Diego A., Cisneros D., Perera R.: “Experimental study on reinforced concrete beams externally shear strengthened with CFRP sheets”, Construction and Building Materials. Aceptado, en revisión.




How to Cite

Alzate, A., Arteaga, A., de Diego, A., Cisneros, D., & Perera, R. (2013). Shear strengthening of reinforced concrete members with CFRP sheets. Materiales De Construcción, 63(310), 251–265.



Research Articles