The need for strengthening of existing structures has recently become topical. Composite materials due to their remarkable properties, possibility to adaptation to the design requirements and facilitation of restoration measures are widely used for strengthening. This article is focused on review of restoration approaches with the use of composite materials and specific features of their behavior under various impacts. Study includes analysis of recent studies in the area, identifying gaps of knowledge and perspectives for further research. The most relevant areas of research were distinguished including numerical finite element modelling for parametric analysis, deepening of understanding of composites` linearly elastic behavior, approaches to prevent delamination failure. Further thorough research in this area is strongly recommended to deepen the knowledge and maximize the efficiency of use of composite strengthening systems.
Abdalla J. A., Mhanna H. H., Hawileh R. A., Sharafi M., Al-Marzouqi A., Al-Teneiji S., Al-Ali K. (2022). Shear Strengthening of Reinforced Concrete T-Beams using Carbon Fiber Reinforced Polymer (CFRP) Anchored with CFRP Spikes. Procedia Structural Integrity, 42, 1223-1230. doi: 10.1016/j.prostr.2022.12.156
https://doi.org/10.1016/j.prostr.2022.12.156
Abdul Halim N. H. F., Alih S., Vafaei M. (2020). Efficiency of CFRP strips as a substitute for carbon steel stirrups in RC columns. Materials and Structures, 53(5), 1-12, doi: 10.1617/s11527-020-01566-w.
https://doi.org/10.1617/s11527-020-01566-w
Abed F., Al-Mimar M., Ahmed S. (2021) Performance of BFRP RC beams using high strength concrete. Composites Part C: Open Access, 4, 100107. doi:10.1016/j.jcomc.2021.100107
https://doi.org/10.1016/j.jcomc.2021.100107
Adhikary S. D., Li B., Fujikake K. (2015). Residual resistance of impact-damaged reinforced concrete beams. Magazine of Concrete Research, 67(7), 364-378. doi: 10.1680/macr.14.00312
https://doi.org/10.1680/macr.14.00312
Al-Bodour W., Murad Y., Imam R., Smadi Y. (2022) Shear strength investigation of the carbon fiber reinforced polymer-wrapped concrete beams using gene expression programming and finite element analysis. Journal of Structural Integrity and Maintenance, 7:1, 15-24, doi: 10.1080/24705314.2021.1971891
https://doi.org/10.1080/24705314.2021.1971891
Alyaseen A., Poddar A., Alissa J., Alahmad H. Almohammed F. (2022) Behavior of CFRP-strengthened RC beams with web openings in shear zones: Numerical simulation. Materials Today: Proceedings, 65, 3229-3239. doi: 10.1016/j.matpr.2022.05.378
https://doi.org/10.1016/j.matpr.2022.05.378
Blikharskyy Y., Selejdak J., Kopiika N. (2021). Specifics of corrosion processes in thermally strengthened rebar. Case Studies in Construction Materials, 15, e00646. doi:10.1016/j.cscm.2021.e00646. (a)
https://doi.org/10.1016/j.cscm.2021.e00646
Blikharskyy Y., Selejdak J., Vashkevych R., Kopiika N., Blikharskyy Z. (2023). Strengthening RC eccentrically loaded columns by CFRP at different levels of initial load. Engineering Structures, 280, 115694. doi: 10.1016/j.engstruct.2023.115694.
https://doi.org/10.1016/j.engstruct.2023.115694
Blikharskyy Y., Vashkevych R., Kopiika N., Bobalo T., Blikharskyy Z. (2021). Calculation residual strength of reinforced concrete beams with damages, which occurred during loading. In IOP Conference Series: Materials Science and Engineering, 1021, 1, 012012. doi: 10.1088/1757-899X/1021/1/012012 (b).
https://doi.org/10.1088/1757-899X/1021/1/012012
Borysiuk O., Karavan V., Sobczak-Piąstka J. (2019). Calculation of the normal section strength, rigidity and crack resistance of beams, strengthened by carbon-fiber materials. In AIP Conference Proceedings, AIP Publishing LLC. 2077(1), 020008, doi: 10.1063/1.5091869.
https://doi.org/10.1063/1.5091869
Castillo Del Rey E., Griffith M., Ingham J. (2016). Force-based model for straight FRP anchors exhibiting fibre rupture failure mode. In Proceedings of The 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, Hong Kong, 419-427.
Castillo del Rey E., Kanitkar R., Smith S. T., Griffith M. C., Ingham J. M. (2019). Design approach for FRP spike anchors in FRP-strengthened RC structures. Composite Structures, 214, 23-33. doi: 10.1016/j.compstruct.2019.01.100
https://doi.org/10.1016/j.compstruct.2019.01.100
Chen W., Pham T. M., Sichembe H., Chen L., Hao H. (2018) Experimental study of flexural behaviour of RC beams strengthened by longitudinal and U-shaped basalt FRP sheet. Composites Part B, 134, 114e126. doi: 10.1016/j.compositesb.2017.09.053
https://doi.org/10.1016/j.compositesb.2017.09.053
Colajanni P., Pagnotta S. (2021) Influence of the effectiveness factors in assessing the shear capacity of RC beams strengthened with FRP. COMPDYN 2021. 8th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.) Streamed from Athens, Greece, 27-30 June 2021. Eccomas Proceedia COMPDYN (2021), 1345-1367. doi:10.7712/120121.8565.19417
https://doi.org/10.7712/120121.8565.19417
D'Antino T., Focacci F., Sneed L. H., Pellegrino C. (2020) Shear Strength Model for RC Beams with U-Wrapped FRCM Composites. J. Compos. Constr., 24(1): 04019057. doi: 10.1061/(ASCE)CC.1943-5614.0000986.
https://doi.org/10.1061/(ASCE)CC.1943-5614.0000986
Džidić S., Mahmutović A. (2019) Analysis of the possibility for retrofit of rc beams by traditional and modern methods. The 18th International Symposium of MASE. Ohrid, Republic of North Macedonia. October 2019, 270-279.
Gideon D. A., Alagusundaramoorthy P. (2018). Flexural retrofit of RC beams using CFRP laminates. In IOP Conference Series: Materials Science and Engineering, 431, 7, 072006. doi: 10.1088/1757-899X/431/7/072006
https://doi.org/10.1088/1757-899X/431/7/072006
Haya H. M., Hawileh R. A., Al Rashed A., Abdalla J.A. (2022) Performance of RC beams externally strengthened with hybrid CFRP and PETFRP laminates. Procedia Structural Integrity, 42, 1190-1197. doi: 10.1016/j.prostr.2022.12.152
https://doi.org/10.1016/j.prostr.2022.12.152
Huang Z., Deng W., Li R., Chen J., Sui L., Zhou Y., Zhao D., Yang L., Ye J. (2022). Multi-impact performance of prestressed CFRP-strengthened RC beams using H-typed end anchors. Marine Structures, 85, 103264. doi: 10.1016/j.marstruc.2022.103264
https://doi.org/10.1016/j.marstruc.2022.103264
Islam S. M. Z., Ahmed B., Deb J., Shamim S. S., Himel O. F., Nisat M. N. H., Rahman M. M. (2021) Investigation on Flexural Behavior of Pre-cracked RC Beams Strengthened using CFRP. Proceedings of International Conference on Planning, Architecture & Civil Engineering, 114-119, 09 - 11 September 2021, Rajshahi University of Engineering & Technology, Rajshahi, Bangladesh
Jahami A., Temsah Y., Khatib J., Baalbaki O., Kenai S. (2021) The behavior of CFRP strengthened RC beams subjected to blast loading. Magazine of Civil Engineering, 103(3), 10309. doi: 10.34910/MCE.103.9
Kantarci M., Maras M.M., Ayaz Y. (2023) Experimental Performance of RC Beams Strengthened with Aluminum Honeycomb Sandwich Composites and CFRP U‑Jackets. Experimental Techniques, 47, 767-786 doi: 10.1007/s40799-022-00589-y
https://doi.org/10.1007/s40799-022-00589-y
Karpiuk V., Tselikova A., Khudobych A., Kostyuk A., Karpiuk I. (2020). Study of strength, deformability property and crack resistance of beams with BFRP. Eastern-European Journal of Enterprise Technologies, 4(7-106), 42-53. doi: 10.15587/1729-4061.2020.209378
https://doi.org/10.15587/1729-4061.2020.209378
Kopiika N., Blikharskyy Y. (2022). Effectiveness of strengthening of reinforced concrete beams with the use of composite materials. Scientific Journal "Theory and Building Practice", JTBP, 4, 2, 7-16. doi:10.23939/jtbp2022.02.007.
https://doi.org/10.23939/jtbp2022.02.007
Kopiika N., Vegera P., Vashkevych R., Blikharskyy Z. (2021). Stress-strain state of damaged reinforced concrete bended elements at operational load level. Production Engineering Archives, 27(4), 242-247. doi:10.30657/pea.2021.27.32.
https://doi.org/10.30657/pea.2021.27.32
Kramarchuk A., Ilnytskyy B., Bobalo T., Lytvyniak O. (2021). A study of bearing capacity of reinforced masonry beams with GFRP reinforcement. In IOP Conference Series: Materials Science and Engineering, 1021(1), 012018. doi:10.1088/1757-899X/1021/1/012018
https://doi.org/10.1088/1757-899X/1021/1/012018
Maazoun A., Matthys S., Vantomme J. (2017). Literature review on blast protection by externally bonded FRP reinforcement. In Proceedings COST TU1207 End-of-Action Conference. Presented at the COST TU1207 End-of-Action Conference, Budapest, Hungary.
Manibalan P., Abirami G., Baskar R., Pannirselvam N. (2023) Ductile behavior of reinforced concrete beam incorporated with basalt fiber. Innovative Infrastructure Solutions, 8:65, 1-14. doi:10.1007/s41062-023-01033-9
https://doi.org/10.1007/s41062-023-01033-9
Mhanna H. H., Hawileh R. A., Abdalla J. A., Salama A. S. D., Alkhrdaji T. (2021). Shear Strengthening of Reinforced Concrete T-Beams with Anchored CFRP Laminates. Journal of Composites for Construction, 25(4), 04021030. doi: 10.1061/(ASCE)CC.1943-5614.0001141.
https://doi.org/10.1061/(ASCE)CC.1943-5614.0001141
Mhanna H., Hawileh R A., Abdalla J. A. (2022). Effect of FRP Anchor Inclination Angle on Shear Strengthening of Reinforced Concrete T-beams. In 10th International Conference on FRP Composites in Civil Engineering: Proceedings of CICE 2020/2021, 10, 2169-2179. Springer International Publishing. doi:10.1007/978-3-030-88166-5_187
https://doi.org/10.1007/978-3-030-88166-5_187
Murad Y. (2018) An experimental study on flexural strengthening of RC beams using CFRP sheets. International Journal of Engineering & Technology, 7(4), 2075-2080. doi: 10.14419/ijet.v7i4.16546 (a)
https://doi.org/10.14419/ijet.v7i4.16546
Murad Y. (2018) The Influence of CFRP Orientation Angle on the Shear Strength of RC Beams, The Open Construction and Building Technology Journal, 12, 269-281, doi: 10.2174/1874836801812010269 (b)
https://doi.org/10.2174/1874836801812010269
Nabi P., Petkova D., Donchev T. (2020) Behaviour of Columns Constructed with Internal FRP Reinforcement Under Axial Loading. 10th International Conference on FRP Composites in Civil Engineering (CICE 2020), Istanbul 1-3 July 2020. Proceedings of CICE 2020/2021, 10, 878-887. Springer International Publishing. doi: 10.1007/978-3-030-88166-5_76.
https://doi.org/10.1007/978-3-030-88166-5_76
Naser M.Z., Hawileh R.A., Abdalla J.A. (2018). State-of-the-Art Review on the use of Fiber-Reinforced Polymer Composites in Civil Constructions. Engineering Structures. 198, 109542. doi: 10.1016/j.engstruct.2019.109542.
https://doi.org/10.1016/j.engstruct.2019.109542
Naser M.Z.; Hawileh R.A.; Abdalla J.A. (2021) Modeling Strategies of Finite Element Simulation of Reinforced Concrete Beams Strengthened with FRP: A Review. J. Compos. Sci., 5, 19. doi:10.3390/jcs5010019
https://doi.org/10.3390/jcs5010019
Pang M., Shi S., Hu H., Lou T. (2021) Flexural Behavior of Two-Span Continuous CFRP RC Beams. Materials, 14, 6746. doi: 10.3390/ma14226746
https://doi.org/10.3390/ma14226746
Pohoryles D.A., Melo J., Rossetto T. (2021) Combined Flexural and Shear Strengthening of RC T-Beams with FRP and TRM: Experimental Study and Parametric Finite Element Analyses. Buildings, 11, 520. doi:10.3390/buildings11110520
https://doi.org/10.3390/buildings11110520
Saljoughian A, Mostofinejad D. (2020) Behavior of RC columns confined with CFRP using CSB method under cyclic axial compression. Constr Build Mater, 235:117786. doi: 10.1016/j.conbuildmat.2019.117786.
https://doi.org/10.1016/j.conbuildmat.2019.117786
Task Group 9.3 (2001) FRP (Fibre Reinforced Polymer) reinforcement for concrete structures. Technical report on the Design and use of externally bonded fibre reinforced polymer reinforcement (FRP EBR) for reinforced concrete structures. Sprint-Digital-Druck Stuttgart, Lausanne, Switzerland, 138 p. Retrieved from: https://afzir.com/wp-content/uploads/2017/11/Externally-bonded-FRP-Reinf...
Xu Y., Huang J. (2020) Cyclic performance of corroded reinforced concrete short columns strengthened using carbon fiber-reinforced polymer. Constr Build Mater, 247, 118548. doi: 10.1016/j.conbuildmat.2020.118548
https://doi.org/10.1016/j.conbuildmat.2020.118548
Yang J. Q., Smith S. T., Wang Z., Lim Y. Y. (2018). Numerical simulation of FRP-strengthened RC slabs anchored with FRP anchors. Construction and Building Materials, 172, 735-750. doi: 10.1016/j.conbuildmat.2018.03.133
https://doi.org/10.1016/j.conbuildmat.2018.03.133
Yang J., Johansson M., Al-Emrani M., Haghani R. (2021) Innovative flexural strengthening of RC beams using self-anchored prestressed CFRP plates: Experimental and numerical investigations. Engineering Structures, 243, 112687. doi: 10.1016/j.engstruct.2021.112687
https://doi.org/10.1016/j.engstruct.2021.112687
Zhang Y., Li N., Wang Q., Li Z., Qin X. (2022) Shear Behavior of T-Shaped Concrete Beams Reinforced with FRP. Buildings, 12, 2062. doi:10.3390/buildings12122062
https://doi.org/10.3390/buildings12122062
Zhu M., Ueda T., Zhu, J. H. (2020). Generalized evaluation of bond behavior of the externally bonded FRP reinforcement to concrete. Journal of Composites for Construction, 24(6), 04020066. doi: 10.1061/(ASCE
https://doi.org/10.1061/(ASCE)CC.1943-5614.0001081
Žmindák M., Novák P., Dekýš V. (2017). Analysis of bond behaviour in strengthened reinforced concrete beam with carbon fiber reinforced polymer lamella. In MATEC Web of Conferences, 107, 00045. doi: 10.1051/matecconf/201710700045
https://doi.org/10.1051/matecconf/201710700045