Reinforcement of concrete using Glass Fiber Reinforced Polymer



The use of composite materials such as fiber reinforced polymers in strengthening and repairing of structural elements, particularly those made of reinforced concrete, is widely spreading. Among the fiber reinforced polymers (FRP) used for concrete strengthening, GFRP because they are more ductile and cheaper than carbon fibers and can be considered as an alternative solution to repair and strengthen concrete elements. The GFRP enhance significantly the ductility and strength of concrete by forming perfect adhesive bond between the wrapping material and concrete. Present study mainly emphasizes on effectiveness of external GFRP strengthening for concrete beams and columns. Total five circular concrete columns of 320 mm in height and 160 mm in diameter, and 30 concrete rectangular beams with a section of 40 mmx40 mm and 160 mm in length. Two columns were control and the rest three columns were strengthened with three types of GFRP. For beams, fifteen of them was control and the others were strengthened by GFRP with U-shape. All the test specimens were loaded to fail in axial compression and strain for columns, and under three-point bending for beams. The test results clearly demonstrated that compared with the ordinary concrete, the axial load carrying capacity and flexural strength increase for the reinforced concrete no matter the kind of the GFRP used even if it was in different storage condition.


Concrete; GFRP; Reinforcement; Compressive Strength; Flexural Strength

Full Text:



- S. Rizkalla, T. Hassan, Effectiveness of FRP for Strengthening Concrete Bridges. Struct. Eng. Int., 12(2) (2002) 89-95. doi:10.2749/101686602777965577.

- B.Kissi, Y.Riyad, I.Mrani, M.A. Parron, N.Labjar, A.E. Haouzi, M.A. el fqih, C.Guemimi, Influence of zone type on performance of retrofitted Reinforced Concrete buildings by using Pushover Analysis. Materials Today: Proceedings, 5(1, Part 1) (2018) 22-29. doi:10.1016/j.matpr.2017.11.048.

- B. Kissi, Y. Riyad, I. Mrani, B. EL Ghoulbzouri, M.A. Parron, Y. El khatib, Reinforcement of RC structure by carbon fibers. MATEC Web Conf., 83 (2016) 09009. doi:10.1051/matecconf/20168309009.

- Y. Riyad, I. Mrani, B. Kissi, M. Amdi, Influence of bonded length of the Carbon Fiber Reinforced Polymer Plates on the behavior of a concrete beam. Congrès français de mécanique. Association Française de Mécanique, (2017).

- T. Norris, H. Saadatmanesh, M.R. Ehsani, Shear and Flexural Strengthening of R/C Beams with Carbon Fiber Sheets. J. Struct. Eng., 123(7) (1997) 903-911. doi:10.1061/(ASCE)0733-9445(1997)123:7(903).

- V.P.V. Ramana, T. Kant, S.E. Morton, P.K. Dutta, A. Mukherjee, Y.M. Desai, Behavior of CFRPC strengthened reinforced concrete beams with varying degrees of strengthening. Composites Part B, 31(6) (2000) 461-470. doi:10.1016/S1359-8368(00)00022-6.

- G.S. Francesco Bencardino, R.N. Swamy, Strength and Ductility of Reinforced Concrete Beams Externally Reinforced with Carbon Fiber Fabric. ACI Structural Journal, 99(2). doi:10.14359/11539.

- P. Alagusundaramoorthy, I.E. Harik, C.C. Choo, Flexural Behavior of R/C Beams Strengthened with Carbon Fiber Reinforced Polymer Sheets or Fabric. J. Composite Constr., 7(4) (2003) 292-301. doi:10.1061/(ASCE)1090-0268(2003)7:4(292).

- W.P. C.-T. T. Hsu, Z. Zhang, Flexural and Shear Strengthenings of RC Beams Using Carbon Fiber Reinforced Polymer Laminates. ACI Symposium Publication, 211. doi:10.14359/12586.

- F. Bencardino, V. Colotti, G. Spadea, R.N. Swamy, Shear behavior of reinforced concrete beams strengthened in flexure with bonded carbon fibre reinforced polymers laminates. Can J Civ Eng, 32(5) (2005) 812-824. doi:10.1139/l05-027.

- A.-h. Zhang, W.-l. Jin, G.-b. Li, Behavior of preloaded RC beams strengthened with CFRP laminates. Journal of Zhejiang University-SCIENCE A, 7(3) (2006) 436-444. doi:10.1631/jzus.2006.A0436.

- J. Valivonis, T. Skuturna, Cracking and strength of reinforced concrete structures in flexure strengthened with carbon fibre laminates. J. Civ. Eng. Manag., 13(4) (2007) 317-323. doi:10.1080/13923730.2007.9636452.

- B.Y. Bahn, R.S. Harichandran, Flexural Behavior of Reinforced Concrete Beams Strengthened with CFRP Sheets and Epoxy Mortar. J. Composite Constr., 12(4) (2008) 387-395. doi:10.1061/(ASCE)1090-0268(2008)12:4(387).

- H.R. Sobuz, E. Ahmed, N.M.S. Hasan, A. Uddin, Use of carbon fiber laminates for strengthening reinforced concrete beams in bending. Int. J. Civil Str. Eng., 2(1) (2011) 67-84.

- Y.T. Obaidat, S. Heyden, O. Dahlblom, G. Abu-Farsakh, Y. Abdel-Jawad, Retrofitting of reinforced concrete beams using composite laminates. Constr. Build. Mater., 25(2) (2011) 591-597. doi:10.1016/j.conbuildmat.2010.06.082.

- G. Li, Y. Guo, X. Sun, Investigation on flexural performance of RC beams flexurally strengthened by side-bonded CFRP laminates. Open Civ. Eng. J., 6(1) (2012) 26-32. doi:10.2174/1874149501206010026.

- M. Alferjani, A.A. Samad, B.S. Elrawaff, N. Mohamad, M. Hilton, A.A.S. Saiah, Use of carbon fiber reinforced polymer laminate for strengthening reinforced concrete beams in shear: a review. Int. Refereed J. Eng. Sci., 2(2) (2013) 45-53.

- A. Raju, L.A. Mathew, Retrofitting of RC beams using FRP. Int. J. Eng. Res. Tech., 2(1) (2013) 1-6.

- R. Kharatmol, P. Sananse, R. Tambe, R.J. Khare, Strengthening of beams using carbon fibre reinforced polymer. Int. J. Emerg. Eng. Res. Tech., 2(3) (2014) 119-125.

- S.-P. Chiew, Q. Sun, Y. Yu, Flexural Strength of RC Beams with GFRP Laminates. J. Composite Constr., 11(5) (2007) 497-506. doi:10.1061/(ASCE)1090-0268(2007)11:5(497).

- N. Amitha, T. Vrinda, Retrofitting of reinforced concrete beams using carbon fibre composite laminate and glass fibre composite laminate. Indian J. App. Res., (7) (2013) 3.

- M. Dhanu, D. Revathy, S.S. Lijina Rasheed, Experimental and Numerical study of Retrofitted RC Beams using FRP. Int. J. Eng. Res. Gen. Sci., 2(3) (2014) 383-390.

- K. Mini, R.J. Alapatt, A.E. David, A. Radhakrishnan, M.M. Cyriac, R. Ramakrishnan, Experimental study on strengthening of RC beam using glass fibre reinforced composite. Struct. Eng. Mech., 50(3) (2014) 275-286. doi:10.12989/sem.2014.50.3.275

- N. Aravind, Amiya K. Samanta, J.V. Thanikal, D.K.S. Roy, Experimental study on pre-cracked reinforced concrete beams strengthened with externally bonded GFRP composites. Int. J. Mult. Res. Devel., 2(2) (2015) 219-224.

- N. Jain, V.K. Sikka, Strengthening Of RC Beams with Externally Bonded gfrps. IOSR J. Mech. Civ. Eng., 12(2) 139-142. doi:10.9790/1684-1226139142.

- A.N. Nayak, A. Kumari, R.B. Swain, Strengthening of RC Beams Using Externally Bonded Fibre Reinforced Polymer Composites. Structures, 14 (2018) 137-152. doi:10.1016/j.istruc.2018.03.004.

- S. Rushad, S. Duggal, K. Shukla, Experimental investigations of RC beams strengthened with 4-layerd symmetric cross-ply (scp) GFRP laminates. Int. J.Res. Eng. Tech., 4(25) (2015) 431-434. doi:10.15623/ijret.2015.0425064

- T. Subramani, J. Jayalakshmi, Analytical investigation of bonded glass fibre reinforced polymer sheets with reinforced concrete beam using ANSYS. Int. J. Appl. Innov. Eng. Manag., 4(5) (2015) 105-112.

- P. Krupa Engineer, H.P.P.D. Shah, Strengthening of Reinforced Concrete Beams with Fiber Reinforced Polymer sheets with Different Configurations in Shear and Flexure: A Critical Review. Int. J. Res. Anal. Rev., 6(2) (2019) 102-106.

- T.C. Triantafillou, N. Plevris, Strengthening of RC beams with epoxy-bonded fibre-composite materials. Mater. Struct., 25(4) (1992) 201-211. doi:10.1007/BF02473064.

- Y.A. Priastiwi, I. Imran, Nuroji, The Effect of Different Shapes of Confinement in Compression Zone on Beam's Ductility Subjected to Monotonic Loading. Procedia Eng., 125 (2015) 918-924. doi:10.1016/j.proeng.2015.11.098.

- M. Ameli, H.R. Ronagh, P.F. Dux, Behavior of FRP Strengthened Reinforced Concrete Beams under Torsion. J. Composite Constr., 11(2) (2007) 192-200. doi:10.1061/(ASCE)1090-0268(2007)11:2(192).

- M.N.S. Hadi, The behaviour of FRP wrapped HSC columns under different eccentric loads. Compos. Struct., 78(4) (2007) 560-566. doi:10.1016/j.compstruct.2005.11.018.

- H. Sezen, E.A. Miller, Experimental Evaluation of Axial Behavior of Strengthened Circular Reinforced-Concrete Columns. J. Bridge Eng., 16(2) (2011) 238-247. doi:10.1061/(ASCE)BE.1943-5592.0000143.

- R. Kumutha, R. Vaidyanathan, M.S. Palanichamy, Behaviour of reinforced concrete rectangular columns strengthened using GFRP. Cem. Concr. Compos., 29(8) (2007) 609-615. doi:10.1016/j.cemconcomp.2007.03.009.

- K.-t. Lau, L.-m. Zhou, The mechanical behaviour of composite-wrapped concrete cylinders subjected to uniaxial compression load. Compos. Struct., 52(2) (2001) 189-198. doi:10.1016/S0263-8223(00)00167-7.

- R. Raval, U. Dave, Behavior of GFRP Wrapped RC Columns of Different Shapes. Procedia Eng., 51 (2013) 240-249. doi:10.1016/j.proeng.2013.01.033.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

ISSN 2170-127X

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at