Vol. 6 No. 02 (2025)
Articles

Repair of Fire-Damaged Circular and Square Columns Using CFRP Composites: A Comprehensive Review

PDF
  • Muhammad Noman,
  • Muhammad Salman,
  • Afaq Ahmed,
  • Muzammal Hussain,
  • Ali Akhtar,
  • Mohammad Zulqarnain
Muhammad Noman
University of Florida
Muhammad Salman
University of Quebec at Rimouski, Canada
Afaq Ahmed
Oslomet
Muzammal Hussain
UET Taxila
Ali Akhtar
UET Taxila
Mohammad Zulqarnain
Civil Engineering Department, UET Taxila, Pakistan
DOI: https://doi.org/10.38094/jocef602116

Published 2025-09-18

Keywords

  • CFRP,
  • Carbon Fiber Reinforced Polymer Confinement ,
  • Heat Damaged Square Columns,
  • Heat Damaged Rectangular Concrete,
  • Heat Damaged Circular Columns

How to Cite

[1]
Muhammad Noman, M. . Salman, A. . Ahmed, M. . Hussain, A. Akhtar, and M. . Zulqarnain, “Repair of Fire-Damaged Circular and Square Columns Using CFRP Composites: A Comprehensive Review”, JoCEF, vol. 6, no. 02, pp. 82-96, Sep. 2025.

Copyright (c) 2025

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Abstract

In the field of structural engineering, the repair and rehabilitation of fire-damaged circular and square columns pose significant challenges. Carbon Fiber Reinforced Polymer (CFRP) composites have gained popularity as a potentially effective method for restoring the structural integrity of damaged structural members. The purpose of this investigation is to provide a state-of-the-art review of existing experimental and numerical studies in the literature on repairing fire-damaged square/circular columns using CFRP composites. The effectiveness of CFRP as a repairing technique in restoring the axial load-carrying capacity and stiffness of fire-damaged circular, square, and rectangular columns is evaluated. Based on past investigations, it has been concluded that CFRP composites can restore 70-169.2% of the axial capacity and 0-29.2% of the lost resistance. Moreover, the review offers a critical assessment of previous experimental and numerical investigations, highlighting their significant contributions to the advancement of knowledge regarding CFRP-based column repair. A comparative analysis of the experimental results from available studies is carried out, accompanied by a concise examination of the gaps, and a pathway for future researchers is also suggested. In addition to this, probable challenges and limitations, such as stiffness loss after repairing fire-damaged columns with CFRP composites, and ways to counter them, are also summarized in this study. The article provides engineers, researchers, and practitioners involved in the restoration and repair of fire-damaged circular and square columns using CFRP composites with insightful recommendations derived from an exhaustive synthesis of prior literature and case studies.

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References

  1. Z. Tao, M. Ghannam, T.-Y. Song, and L.-H. Han, “Experimental and numerical investigation of concrete-filled stainless steel columns exposed to fire,” J. Constr. Steel Res., vol. 118, pp. 120–134, 2016, doi: https://doi.org/10.1016/j.jcsr.2015.11.003.
  2. A. T. Obaidat, “Repairing of Circular Reinforced Concrete Columns Damaged by Heat Using Carbon Fiber Reinforced Polymers (CFRP) (Rope) Technique,” IOP Conf. Ser. Earth Environ. Sci., vol. 498, no. 1, 2020, doi: 10.1088/1755-1315/498/1/012042.
  3. X. L. Zhao, “Recent Developments in FRP Strengthening of Metallic Structures,” in First Middle East Conference on Smart Monitoring, Assesment and Rehabilitation of Civil Structures, Dubai, UAE, 2011, pp. 2–9.
  4. K. V. K. R., C. Fu-Ping, W. Tien-Chih, and S. M. A., “Effect of Strength and Fiber Reinforcement on Fire Resistance of High-Strength Concrete Columns,” J. Struct. Eng., vol. 129, no. 2, pp. 253–259, Feb. 2003, doi: 10.1061/(ASCE)0733-9445(2003)129:2(253).
  5. D. Cree, E. U. Chowdhury, M. F. Green, L. A. Bisby, and N. Bénichou, “Performance in fire of FRP-strengthened and insulated reinforced concrete columns,” Fire Saf. J., vol. 54, pp. 86–95, 2012, doi: https://doi.org/10.1016/j.firesaf.2012.08.006.
  6. E. E. Etman, “Rehabilitation and Strengthening of Fire Damaged Reinforced Concrete Beams Using CFRP Plates,” no. April 2002, 2002, [Online]. Available: https://www.researchgate.net/publication/300098953
  7. Z. Tao, Z. Bin Wang, L. H. Han, and B. Uy, “Fire performance of concrete-filled steel tubular columns strengthened by CFRP,” Steel Compos. Struct., vol. 11, no. 4, pp. 307–324, 2011, doi: 10.12989/scs.2011.11.4.307.
  8. S.-W. Yoo and J. F. Choo, “Behavior of CFRP-reinforced concrete columns at elevated temperatures,” Constr. Build. Mater., vol. 358, p. 129425, 2022, doi: https://doi.org/10.1016/j.conbuildmat.2022.129425.
  9. E. Ahmed and A. Atorod, “Behavior of Circular Concrete-Filled Steel Tube Columns,” in Composite Construction in Steel and Concrete IV, in Proceedings. 2012, pp. 573–583. doi: doi:10.1061/40616(281)50.
  10. L. H. Han, Y. Q. Zheng, and J. G. Teng, “Fire resistance of RC and FRP-confined RC columns,” Mag. Concr. Res., vol. 58, no. 8, pp. 533–546, Oct. 2006, doi: 10.1680/macr.2006.58.8.533.
  11. Z. Cui and Z. Yang, “Study on the Fire Resistance of Reinforced Concrete Structures Strengthened with Carbon Fiber Fabric,” vol. 5, no. 8, pp. 1–5, 2025.
  12. A. Salameh, R. Hawileh, M. Assad, and J. Abdallah, “Bond Slip Behavior for CFRP-to-Concrete Joints at Room Temperature,” Key Eng. Mater., vol. 1004, no. December, pp. 3–12, 2024, doi: 10.4028/p-CiE4bW.
  13. A. U. Rehman, Z. A. Siddiqi, M. Yasin, H. M. S. Aslam, S. Noshin, and H. M. U. Aslam, “Experimental study on the behavior of damaged CFRP and steel rebars RC columns retrofitted with externally bonded composite material,” Adv. Compos. Mater., vol. 34, no. 1, pp. 93–139, 2025, doi: 10.1080/09243046.2024.2358262.
  14. A. Akhtar, S. Saleem, M. Salman, M. Noman, M. Zulqarnain, and T. Jirawattanasomkul, “Performance of square masonry columns retrofitted with NSM steel and GFRP reinforcement under axial compression,” Constr. Build. Mater., vol. 458, Aug. 2024, doi: 10.1016/j.conbuildmat.2024.139534.
  15. M. Yaqub and C. G. Bailey, “Cross sectional shape effects on the performance of post-heated reinforced concrete columns wrapped with FRP composites,” Compos. Struct., vol. 93, no. 3, pp. 1103–1117, 2011, doi: https://doi.org/10.1016/j.compstruct.2010.09.012.
  16. J. Liu, P. Gao, X. Lin, X. Wang, X. Zhou, and Y. F. Chen, “Experimental assessment on the size effects of circular concrete-filled steel tubular columns under axial compression,” Eng. Struct., vol. 275, p. 115247, 2023, doi: https://doi.org/10.1016/j.engstruct.2022.115247.
  17. B. Chen and Z. Yang, “Axial compressive behavior of CFRP reinforced concrete filled steel tube short columns with a circumferential gap,” E3S Web Conf., vol. 490, 2024, doi: 10.1051/e3sconf/202449001013.
  18. Z. Tao and L.-H. Han, “Behaviour of fire-exposed concrete-filled steel tubular beam columns repaired with CFRP wraps,” Thin-Walled Struct., vol. 45, no. 1, pp. 63–76, 2007, doi: https://doi.org/10.1016/j.tws.2006.11.004.
  19. C. Jing, L. Zhao, S. Chen, T. Wu, Z. Chen, and B. Liu, “Experimental and numerical simulation of reinforced concrete-filled GFRP pultruded tubular columns under axial compression,” Constr. Build. Mater., vol. 462, 2025, doi: 10.1016/j.conbuildmat.2025.139914.
  20. G. Y. Y. K. Y. L. Lingying, “High-Temperature Mechanical Properties of Carbon Fiber Reinforced Polyimide Resin Composites MT300/KH420 (I)—Tensile and Interlaminar Shear Properties,” J. Compos. Mater., vol. 06, 2016, doi: http://dx.doi.org/10.13801/j.cnki.fhclxb.20160122.001.
  21. C. Zhang, Y. Li, and J. Wu, “Mechanical Properties of Fiber-Reinforced Polymer (FRP) Composites at Elevated Temperatures,” Buildings, vol. 13, no. 1, pp. 1–17, 2023, doi: 10.3390/buildings13010067.
  22. C. E. U., B. L. A., G. M. F., and K. V K., “Residual Behavior of Fire-Exposed Reinforced Concrete Beams Prestrengthened in Flexure with Fiber-Reinforced Polymer Sheets,” J. Compos. Constr., vol. 12, no. 1, pp. 61–68, Feb. 2008, doi: 10.1061/(ASCE)1090-0268(2008)12:1(61).
  23. V. K. R. Kodur, L. A. Bisby, and M. F. Green, “Experimental evaluation of the fire behaviour of insulated fibre-reinforced-polymer-strengthened reinforced concrete columns,” Fire Saf. J., vol. 41, no. 7, pp. 547–557, 2006, doi: https://doi.org/10.1016/j.firesaf.2006.05.004.
  24. E. U. Chowdhury, L. A. Bisby, M. F. Green, and V. K. R. Kodur, “Investigation of insulated FRP-wrapped reinforced concrete columns in fire,” Fire Saf. J., vol. 42, no. 6, pp. 452–460, 2007, doi: https://doi.org/10.1016/j.firesaf.2006.10.007.
  25. J. P. Firmo, J. R. Correia, and L. A. Bisby, “Fire behaviour of FRP-strengthened reinforced concrete structural elements: A state-of-the-art review,” Compos. Part B Eng., vol. 80, pp. 198–216, 2015, doi: https://doi.org/10.1016/j.compositesb.2015.05.045.
  26. M. F. Green, L. A. Bisby, A. Z. Fam, and V. K. R. Kodur, “FRP confined concrete columns: Behaviour under extreme conditions,” Cem. Concr. Compos., vol. 28, no. 10, pp. 928–937, 2006, doi: https://doi.org/10.1016/j.cemconcomp.2006.07.008.
  27. V. Kodur, L. A. Bisby, M. F. Green, and E. C. Chowdhury, “Fire endurance of insulated FRP-strengthened square concrete columns,” Am. Concr. Institute, ACI Spec. Publ., vol. SP-230, no. January, pp. 1253–1267, 2005, doi: 10.14359/14892.
  28. R. T. Terms, “Fire endurance of FRP-strengthened reinforced concrete columns,” NRC Publ. Rec., pp. 1–15, 1963.
  29. E. U. Chowdhury, L. A. Bisby, M. F. Green, N. Bénichou, and V. K. R. Kodur, “Fire behaviour of FRP wrapped squarereinforced concrete columns,” Third Int. Conf. Durab. F. Appl. Fibre Reinf. Polym. Compos. Constr., no. June 2014, pp. 83–90.
  30. S. G. Wesnousky, “Earthquakes, quaternary faults, and seismic hazard in California,” J. Geophys. Res. Solid Earth, vol. 91, no. B12, pp. 12587–12631, Nov. 1986, doi: https://doi.org/10.1029/JB091iB12p12587.
  31. D. Vamvatsikos et al., “Structural vulnerability assessment under natural hazards: A review,” COST ACTION C26 Urban Habitat Constr. under Catastrophic Events - Proc. Final Conf., no. April 2018, pp. 711–723, 2010.
  32. V. Janssens, D. W. O’Dwyer, and M. K. Chryssanthopoulos, “Assessing the Consequences of Building Failures,” Struct. Eng. Int., vol. 22, no. 1, pp. 99–104, Feb. 2012, doi: 10.2749/101686612X13216060213473.
  33. Malalgoda, C., Amaratunga, D. and Haigh, R., “Challenges in creating a disaster resilient built environment.” Procedia Economics and Finance, 18, pp.736-744, 2014.
  34. Z. Wang, D. Wang, S. T. Smith, and D. Lu, “CFRP-Confined Square RC Columns. I: Experimental Investigation,” J. Compos. Constr., vol. 16, no. 2, pp. 150–160, 2012, doi: 10.1061/(asce)cc.1943-5614.0000245.
  35. R. Kotynia, H. Abdel Baky, K. W. Neale, and U. A. Ebead, “Flexural Strengthening of RC Beams with Externally Bonded CFRP Systems: Test Results and 3D Nonlinear FE Analysis,” J. Compos. Constr., vol. 12, no. 2, pp. 190–201, 2008, doi: 10.1061/(asce)1090-0268(2008)12:2(190).
  36. A. H. Al-Abdwais and A. K. Al-Tamimi, “Evaluation of Bonding Properties Between CFRP Laminate and Concrete Using Externally Bonded Reinforcement on Transverse Grooves (EBROTG) Method,” J. Compos. Sci., vol. 8, no. 12, 2024, doi: 10.3390/jcs8120488.
  37. L. Wang, D. Cheng, and X. Wang, “Experimental Research on Mechanical Properties of Carbon Fiber-Reinforced Reactive Powder Concrete after Exposure to Cryogenic Temperatures.,” Mater. (Basel, Switzerland), vol. 15, no. 12, Jun. 2022, doi: 10.3390/ma15124240.
  38. C. Wu, Y. Su, P. Zhang, H. Zhu, D. Gao, and S. A. Sheikh, “Experimental Study of GFRP Reinforced Concrete Beams With U-Shaped CFRP Grid-Reinforced ECC Stay-in-Place Formwork,” Front. Mater., vol. 9, no. March, pp. 1–15, 2022, doi: 10.3389/fmats.2022.872232.
  39. Qiang Wang, Hong Zhu, Bai Zhang, Yixuan Tong, Fei Teng, and Weiqiang Su, “Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review,” J. Reinf. Plast. Compos., vol. 39, no. 9–10, pp. 327–344, Mar. 2020, doi: 10.1177/0731684420905010.
  40. J. Zhou and L. Wang, “Repair of Fire-Damaged Reinforced Concrete Members with Axial Load: A Review,” Sustain., vol. 11, no. 4, pp. 1–16, 2019, doi: 10.3390/su11040963.
  41. B. J. Bett, R. E. Klingner, and J. O. Jirsa, “LATERAL LOAD RESPONSE OF STRENGTHENED AND REPAIRED REINFORCED CONCRETE COLUMNS,” Aci Struct. J., vol. 85, pp. 499–508, 1988, [Online]. Available: https://api.semanticscholar.org/CorpusID:137430349
  42. B. Hasan and S. Ullah, “a Review on Frp Repairing of Fire Damaged Rc Members,” no. September, pp. 0–8, 2021.
  43. Marina Alkess Kerllos Ibrahim and Khaled Farouk Omar El-Kashif, “‘‘Behavior of strengthened reinforced concrete columns after exposure to elevated temperature”,” Adv. Struct. Eng., p. 13694332251334838, Apr. 2025, doi: 10.1177/13694332251334838.
  44. A. Gholampour, R. Hassanli, J. E. Mills, T. Vincent, and M. Kunieda, “Experimental investigation of the performance of concrete columns strengthened with fiber reinforced concrete jacket,” Constr. Build. Mater., vol. 194, pp. 51–61, 2019, doi: https://doi.org/10.1016/j.conbuildmat.2018.10.236.
  45. L. Wang and R. K.-L. Su, “Repair of Fire-Exposed Preloaded Rectangular Concrete Columns by Postcompressed Steel Plates,” J. Struct. Eng., vol. 140, no. 3, 2014, doi: 10.1061/(asce)st.1943-541x.0000884.
  46. L. Wang and R. Kai-Leung Su, “Theoretical and Experimental Study of Plate-Strengthened Concrete Columns under Eccentric Compression Loading,” J. Struct. Eng., vol. 139, no. 3, pp. 350–359, 2013, doi: 10.1061/(asce)st.1943-541x.0000659.
  47. R. K. L. Su and L. Wang, “Axial strengthening of preloaded rectangular concrete columns by precambered steel plates,” Eng. Struct., vol. 38, pp. 42–52, 2012, doi: https://doi.org/10.1016/j.engstruct.2012.01.003.
  48. L. Wang and R.K.L. Su, “Experimental Investigation of Preloaded RC Columns Strengthened with Precambered Steel Plates under Eccentric Compression Loading,” Adv. Struct. Eng., vol. 15, no. 8, pp. 1253–1264, Aug. 2012, doi: 10.1260/1369-4332.15.8.1253.
  49. R. K. L. Su and L. Wang, “Flexural and axial strengthening of preloaded concrete columns under large eccentric loads by flat and precambered steel plates,” Struct. Infrastruct. Eng., vol. 11, no. 8, pp. 1083–1101, Aug. 2015, doi: 10.1080/15732479.2014.936879.
  50. R. K. L. Wang. L,Su, “Strengthening of preloaded RC columns by post compressed plates-a review,” Struct. Eng. Mech., vol. 65, no. 4, pp. 477–490, 2018, doi: https://doi.org/10.12989/sem.2018.65.4.477.
  51. L. Wang, R. K. L. Su, B. Cheng, L. Z. Li, L. Wan, and Z. W. Shan, “Seismic behavior of preloaded rectangular RC columns strengthened with precambered steel plates under high axial load ratios,” Eng. Struct., vol. 152, pp. 683–697, 2017, doi: https://doi.org/10.1016/j.engstruct.2017.09.048.
  52. A. P. Michael, H. R. Hamilton, and M. H. Ansley, “Concrete confinement using carbon fiber reinforced polymer grid,” Am. Concr. Institute, ACI Spec. Publ., vol. SP-230, pp. 991–1009, 2005, doi: 10.14359/14877.
  53. T. Turgay, Z. Polat, H. O. Koksal, B. Doran, and C. Karakoç, “Compressive behavior of large-scale square reinforced concrete columns confined with carbon fiber reinforced polymer jackets,” Mater. Des., vol. 31, no. 1, pp. 357–364, 2010, doi: https://doi.org/10.1016/j.matdes.2009.06.008.
  54. B. Doran, H. O. Koksal, and T. Turgay, “Nonlinear finite element modeling of rectangular/square concrete columns confined with FRP,” Mater. Des., vol. 30, no. 8, pp. 3066–3075, 2009, doi: 10.1016/j.matdes.2008.12.007.
  55. M. N. S. Hadi, “Behaviour of eccentric loading of FRP confined fibre steel reinforced concrete columns,” Constr. Build. Mater., vol. 23, no. 2, pp. 1102–1108, 2009, doi: https://doi.org/10.1016/j.conbuildmat.2008.05.024.
  56. S. Rocca, N. Galati, and A. Nanni, “Interaction diagram methodology for design of FRP-confined reinforced concrete columns,” Constr. Build. Mater., vol. 23, no. 4, pp. 1508–1520, 2009, doi: https://doi.org/10.1016/j.conbuildmat.2008.06.010.
  57. G. Promis, E. Ferrier, and P. Hamelin, “Effect of external FRP retrofitting on reinforced concrete short columns for seismic strengthening,” Compos. Struct., vol. 88, no. 3, pp. 367–379, 2009, doi: https://doi.org/10.1016/j.compstruct.2008.04.019.
  58. T. El Maaddawy, “Strengthening of Eccentrically Loaded Reinforced Concrete Columns with Fiber-Reinforced Polymer Wrapping System: Experimental Investigation and Analytical Modeling,” J. Compos. Constr., vol. 13, no. 1, pp. 13–24, 2009, doi: 10.1061/(asce)1090-0268(2009)13:1(13).
  59. I. M. A., A. R. Z., and I. M. A., “Experimental and Parametric Study of Circular Short Columns Confined with CFRP Composites,” J. Compos. Constr., vol. 13, no. 2, pp. 135–147, Apr. 2009, doi: 10.1061/(ASCE)1090-0268(2009)13:2(135).
  60. Y.-C. Wang and K. Hsu, “Design of FRP-wrapped reinforced concrete columns for enhancing axial load carrying capacity,” Compos. Struct., vol. 82, no. 1, pp. 132–139, 2008, doi: https://doi.org/10.1016/j.compstruct.2007.04.002.
  61. R. Benzaid, N. E. Chikh, and H. Mesbah, “Behaviour of square concrete column confined with GFRP composite WARP,” J. Civ. Eng. Manag., vol. 14, no. 2, pp. 115–120, 2008, doi: 10.3846/1392-3730.2008.14.6.
  62. T. El Maaddawy, “Behavior of corrosion-damaged RC columns wrapped with FRP under combined flexural and axial loading,” Cem. Concr. Compos., vol. 30, no. 6, pp. 524–534, 2008, doi: https://doi.org/10.1016/j.cemconcomp.2008.01.006.
  63. M. M. Mia, “Retrofit of slender square reinforced concrete columns with glass fiber-reinforced polymer for seismic resistance,” Iran. J. Sci. Technol. Trans. B Eng., vol. 32, no. 5, pp. 437–450, doi: 10.22099/ijstc.2013.723.
  64. Y. A. Al-Salloum, “Influence of edge sharpness on the strength of square concrete columns confined with FRP composite laminates,” Compos. Part B Eng., vol. 38, no. 5, pp. 640–650, 2007, doi: https://doi.org/10.1016/j.compositesb.2006.06.019.
  65. S. A. Sheikh and Y. Li, “Design of FRP confinement for square concrete columns,” Eng. Struct., vol. 29, no. 6, pp. 1074–1083, 2007, doi: https://doi.org/10.1016/j.engstruct.2006.07.016.
  66. M. F. Green, L. A. Bisby, A. Z. Fam, and V. K. R. Kodur, “FRP confined concrete columns: Behaviour under extreme conditions,” Cem. Concr. Compos., vol. 28, no. 10, pp. 928–937, 2006, doi: 10.1016/j.cemconcomp.2006.07.008.
  67. R. Kumutha and M. S Palanichamy, “Investigation of Reinforced Concrete Columns Confined using Glass Fiber-reinforced Polymers,” J. Reinf. Plast. Compos., vol. 25, no. 16, pp. 1669–1678, Nov. 2006, doi: 10.1177/0731684406068409.
  68. M. N. S. Hadi, “Behaviour of FRP wrapped normal strength concrete columns under eccentric loading,” Compos. Struct., vol. 72, no. 4, pp. 503–511, 2006, doi: https://doi.org/10.1016/j.compstruct.2005.01.018.
  69. K. Galal, A. Arafa, and A. Ghobarah, “Retrofit of RC square short columns,” Eng. Struct., vol. 27, no. 5, pp. 801–813, 2005, doi: https://doi.org/10.1016/j.engstruct.2005.01.003.
  70. A. P. Michael, H. R. Hamilton, and M. H. Ansley, “Concrete confinement using carbon fiber reinforced polymer grid,” Am. Concr. Institute, ACI Spec. Publ., vol. SP-230, no. January 2005, pp. 991–1009, 2005, doi: 10.14359/14877.
  71. Z. Yan, C. P. Pantelides, and L. D. Reaveley, “Shape modification with expansive cement concrete for confinement with FRP composites,” Am. Concr. Institute, ACI Spec. Publ., vol. SP-230, pp. 1047–1066, 2005, doi: 10.14359/14880.
  72. S. P. Tastani and S. J. Pantazopoulou, “Experimental evaluation of FRP jackets in upgrading RC corroded columns with substandard detailing,” Eng. Struct., vol. 26, no. 6, pp. 817–829, 2004, doi: https://doi.org/10.1016/j.engstruct.2004.02.003.
  73. K. A. Harries and S. A. Carey, “Shape and ‘gap’ effects on the behavior of variably confined concrete,” Cem. Concr. Res., vol. 33, no. 6, pp. 881–890, 2003, doi: https://doi.org/10.1016/S0008-8846(02)01085-2.
  74. K. A. Harries and G. Kharel, “Experimental investigation of the behavior of variably confined concrete,” Cem. Concr. Res., vol. 33, no. 6, pp. 873–880, 2003, doi: https://doi.org/10.1016/S0008-8846(02)01086-4.
  75. R. Realfonzo and A. Napoli, “Concrete confined by FRP systems: Confinement efficiency and design strength models,” Compos. Part B Eng., vol. 42, no. 4, pp. 736–755, 2011, doi: https://doi.org/10.1016/j.compositesb.2011.01.028.
  76. M. Demers and K. W. Neale, “Confinement of reinforced concrete columns with fibre-reinforced composite sheets - an experimental study,” Can. J. Civ. Eng., vol. 26, no. 2, pp. 226–241, Apr. 1999, doi: 10.1139/l98-067.
  77. M. Amir, S. Mohsen, S. Michel, E. H. El, M. J. Carlos, and P. Odell, “Effect of Column Parameters on FRP-Confined Concrete,” J. Compos. Constr., vol. 2, no. 4, pp. 175–185, Nov. 1998, doi: 10.1061/(ASCE)1090-0268(1998)2:4(175).
  78. H. Saadatmanesh, M. R. Ehsani, and M. W. Li, “Strength and ductility of concrete columns externally reinforced with fiber composite straps,” ACI Struct. J., vol. 91, no. 4, pp. 434–447, 1994, doi: 10.14359/4151.
  79. M. Yaqub and C. G. Bailey, “Repair of fire damaged circular reinforced concrete columns with FRP composites,” Constr. Build. Mater., vol. 25, no. 1, pp. 359–370, 2011, doi: https://doi.org/10.1016/j.conbuildmat.2010.06.017.
  80. Y. S. S. Al-Kamaki, “Strengthening of fire-damaged RC columns using CFRP fabrics,” Swinburne University of Technology, 2015. doi: 10.25916/sut.26286337.v1.
  81. I. Hussain, M. Yaqub, M. Mortazavi, M. A. Ehsan, and M. Hussain, “Study of fire-damaged circular RC columns repaired using composite confinement techniques,” Proc. Inst. Civ. Eng. - Struct. Build., vol. 177, no. 3, pp. 222–234, Jun. 2022, doi: 10.1680/jstbu.21.00017.
  82. J. Xu, “Circular reinforced concrete columns damaged by fire and retrofitted with CFRP and Steel Jacketing,” Syracuse University, 2022. [Online]. Available: https://surface.syr.edu/etd/1573
  83. H. S. Al-Nimry and A. M. Ghanem, “FRP Confinement of Heat-Damaged Circular RC Columns,” Int. J. Concr. Struct. Mater., vol. 11, no. 1, pp. 115–133, 2017, doi: 10.1007/s40069-016-0181-4.
  84. M. Yaqub, C. G. Bailey, and P. Nedwell, “Axial capacity of post-heated square columns wrapped with FRP composites,” Cem. Concr. Compos., vol. 33, no. 6, pp. 694–701, 2011, doi: https://doi.org/10.1016/j.cemconcomp.2011.03.011.
  85. N. Moghtadernejad, M. Jamshidi, M. R. Maheri, and C. K. Keong, “Repair of post-heated short rectangular reinforced concrete columns with FRP jackets,” Structures, vol. 34, pp. 4269–4283, 2021, doi: https://doi.org/10.1016/j.istruc.2021.10.038.
  86. H. Al-Nimry, R. Haddad, S. Afram, and M. Abdel-Halim, “Effectiveness of advanced composites in repairing heat-damaged RC columns,” Mater. Struct. Constr., vol. 46, no. 11, pp. 1843–1860, 2013, doi: 10.1617/s11527-013-0022-8.
  87. A. A. Abadel, M. I. Khan, and R. Masmoudi, “Axial capacity and stiffness of post-heated circular and square columns strengthened with carbon fiber reinforced polymer jackets,” Structures, vol. 33, pp. 2599–2610, 2021, doi: https://doi.org/10.1016/j.istruc.2021.05.081.
  88. A. T. Obaidat, A. M. Ashteyat, S. Hanandeh, and A. Y. Al-Btoush, “Behavior of heat damaged circular reinforced concrete columns repaired using Carbon Fiber Reinforced Polymer rope,” J. Build. Eng., vol. 31, p. 101424, 2020, doi: https://doi.org/10.1016/j.jobe.2020.101424.