Integrating CFRP U-Wrapping and Spike Anchors in the Applications of Flexural Strengthening of RC Beams
References
- Ababneh, A. N., Al-Rousan, R. Z., & Ghaith, I. M. N. (2020). Experimental study on anchoring of FRP-strengthened concrete beams. Structures, 23, 26–33.
https://doi.org/10.1016/j.istruc.2019.09.018 . - Abdallah, M., Al Mahmoud, F., Khalil, N., & Khelil, A. (2023). Effect of the strengthening patterns on the flexural performance of RC continuous beams using FRP reinforcements. Engineering Structures, 280, 115657.
https://doi.org/10.1016/j.engstruct.2023.115657 . - Abed, R. J., Mashrei, M. A., & Sultan, A. A. (2021). Evaluating Flexural Strength of RC Beams Strengthened by CFRP using Different Analytical Models. Civil and Environmental Engineering, 17(2), 465–475.
https://doi.org/10.2478/cee-2021-0049 . - Abed, R. J., Mashrei, M. A., & Sultan, A. A. (2022). Flexural behavior of reinforced concrete beams strengthened by carbon fiber reinforced polymer using different strengthening techniques. Advances in Structural Engineering, 25(2), 355–373.
https://doi.org/10.1177/13694332211049992 - ACI Committee 318. (2025). ACI CODE-318-25: Building Code for Structural Concrete—Code Requirements and Commentary (ACI CODE-318-25) [Technical Documents].
https://www.concrete.org/store/productdetail.aspx?ItemID=318U25&Language=English&Units=US_Units . - ACI PRC 440.2. (2023). ACI PRC-440.2-23: Design and Construction of Externally Bonded Fiber-Reinforced Polymer (FRP) Systems for Strengthening Concrete Structures—Guide.
https://www.concrete.org/publications/internationalconcreteabstractsportal/m/details/id/51740286 . - Akbarzadeh Bengar, H., & Shahmansouri, A. A. (2020). A new anchorage system for CFRP strips in externally strengthened RC continuous beams. Journal of Building Engineering, 30, 101230.
https://doi.org/10.1016/j.jobe.2020.101230 . - Alhelal, A., Kalfat, R., & Al-Mahaidi, R. (2026). Mitigation of intermediate crack induced debonding of FRP strengthened RC members using FRP spike anchors. Materials and Structures, 59(2), 68.
https://doi.org/10.1617/s11527-026-02972-2 . - Alkhateeb, M. Y., & Hejazi, F. (2022). Reinforced concrete beams externally strengthened by CFRP rods with steel plate, anchorage bolts, and concrete jacketing. Structures, 46, 1994–2013.
https://doi.org/10.1016/j.istruc.2022.11.024 . - Al-Mamory, Z. K., & Al-Ahmed, A. H. A. (2022). Behavior of steel fiber reinforced concrete beams with CFRP wrapped lap splice bars. Structures, 44, 1995–2011.
- Assad, M., Hawileh, R. A., & Abdalla, J. A. (2024). Flexural strengthening of reinforced concrete beams with CFRP laminates and spike anchors. Composites Part C: Open Access, 13, 100443.
https://doi.org/10.1016/j.jcomc.2024.100443 . - Aykac, S., Kalkan, I., Aykac, B., Karahan, S., & Kayar, S. (2013). Strengthening and Repair of Reinforced Concrete Beams Using External Steel Plates.
https://ascelibrary.org/doi/10.1061/%28ASCE%29ST.1943-541X.0000714 . - Bai, Y.-L., Niu, W.-Q., Mei, S.-J., & Gao, W.-Y. (2025). Flexural behavior of hybrid C-PET FRP-strengthened RC beams with U-strip anchorages. Engineering Structures, 322, 119164.
https://doi.org/10.1016/j.engstruct.2024.119164 . - BS 4449:2005+A3. (2016). Steel for the reinforcement of concrete. Weldable reinforcing steel. Bar, coil and decoiled product. Specification.
https://www.en-standard.eu/bs-4449-2005-a3-2016-steel-for-the-reinforcement-of-concrete-weldable-reinforcing-steel-bar-coil-and-decoiled-product-specification/ . - BS EN 12390-3: (2019). Testing hardened concrete: Compressive strength of test specimens. Bing.
https://www.bing.com/search?q=BS+EN+12390-3%3A+Testing+hardened+concrete%3A+Compressive+strength+of+test+specimens.&FORM=SSQNT1&adppc=EDGEDBB&PC=EDGEDB . - Cui, J., Xing, G., Miao, P., Zhang, Y., Chang, Z., & Khan, A. Q. (2024). Flexural behavior of RC beams strengthened with BFRP bars and CFRP U-jackets: Experimental and numerical analysis. Journal of Building Engineering, 97, 110932.
https://doi.org/10.1016/j.jobe.2024.110932 . - Del Rey Castillo, E., Dizhur, D., Griffith, M., & Ingham, J. (2019). Strengthening RC structures using FRP spike anchors in combination with EBR systems. Composite Structures, 209, 668–685.
https://doi.org/10.1016/j.compstruct.2018.10.093 . - Del Rey Castillo, 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.
https://doi.org/10.1016/j.compstruct.2019.01.100 . - Fu, B., Chen, G. M., & Teng, J. G. (2017). Mitigation of intermediate crack debonding in FRP-plated RC beams using FRP U-jackets. Composite Structures, 176, 883–897.
https://doi.org/10.1016/j.compstruct.2017.05.049 . - Gu, W., Liu, H., & Dong, Y. (2022). Experimental Study on the Flexural Properties of Concrete Beams Reinforced with Hybrid Steel/Fiber-Belt-Bars. Materials, 15(10), 3505.
- Hajighasemali, S., Ramezanianpour, A., & Kashefizadeh, M. (2014). The effect of alkali–silica reaction on strength and ductility analyses of RC beams. Magazine of Concrete Research, 66(15), 751–760.
https://doi.org/10.1680/macr.13.00282 . - Hussein, M., Kunieda, M., & Nakamura, H. (2012). Strength and ductility of RC beams strengthened with steel-reinforced strain hardening cementitious composites. Cement and Concrete Composites, 34(9), 1061–1066.
https://doi.org/10.1016/j.cemconcomp.2012.06.004 . - Kaur, M., Chawla, H., & Kwatra, N. (2025). Bonding techniques for CFRP-concrete interfaces: A comparative study of epoxy anchors and grooves with GO-modified epoxy. Structures, 75, 108719.
https://doi.org/10.1016/j.istruc.2025.108719 . - Liu, Y.-L., Hong, J.-Q., Deng, J., Guo, D., & Dai, J.-G. (2024). Structural performance of RC beams strengthened with hybrid bonded CFRP. Journal of Building Engineering, 88, 109178.
https://doi.org/10.1016/j.jobe.2024.109178 . - Mashrei, Mohammed. A., Makki, Jamal. S., & Sultan, A. A. (2019). Flexural Strengthening of Reinforced Concrete Beams Using Carbon Fiber Reinforced Polymer (CFRP) Sheets with Grooves. Latin American Journal of Solids and Structures, 16(4), e176.
https://doi.org/10.1590/1679-78255514 . - Mcguirk, G. N. (n.d.). Development of Anchorage System for Frp Strengthening Applications Using Integrated Frp Composite Anchors. Retrieved January 15, 2026, from
https://scholarworks.umass.edu/entities/publication/829a1658-5beb-4e51-a359-4e0ebfd9259a . - Mirmiran, A., Shahawy, M., & Samaan, M. (1999). Strength and Ductility of Hybrid FRP-Concrete Beam-Columns. Journal of Structural Engineering-Asce - J STRUCT ENG-ASCE, 125.
https://doi.org/10.1061/(ASCE)0733-9445(1999)125:10(1085) . - Mostofinejad, D., & Mahmoudabadi, E. (2010). Grooving as Alternative Method of Surface Preparation to Postpone Debonding of FRP Laminates in Concrete Beams.
https://ascelibrary.org/doi/10.1061/%28ASCE%29CC.1943-5614.0000117 . - Pam, H. J., Kwan, A. K. H., & Islam, M. S. (2001). Flexural strength and ductility of reinforced normal- and high-strength concrete beams. Proceedings of the Institution of Civil Engineers - Structures and Buildings, 146(4), 381–389.
https://doi.org/10.1680/stbu.2001.146.4.381 . - R. Park. (1988). Ductility evaluation from laboratory and analytical testing (p. VIII 605-VIII 616).
- Rasheed, H. A., Zaki, M. A., & Raheem, M. M. (2024). Effectiveness of Fiber Anchors in CFRP Flexural Strengthening of RC Girders. Journal of Composites for Construction, 28(4), 04024028.
https://doi.org/10.1061/JCCOF2.CCENG-4367 . - Saeed, F. H., Hejazi, F., & Rashid, R. S. M. (2025). Mechanical anchorage system in retrofitting of RC slabs using CFRP rods and concrete jacket. Archives of Civil and Mechanical Engineering, 25(2), 72.
https://doi.org/10.1007/s43452-025-01127-4 . - Sanginabadi, K., Yazdani, A., Mostofinejad, D., & Czaderski, C. (2022). RC members externally strengthened with FRP composites by grooving methods including EBROG and EBRIG: A state-of-the-art review. Construction and Building Materials, 324, 126662.
https://doi.org/10.1016/j.conbuildmat.2022.126662 . - Spadea, G., Bencardino, F., & Swamy, R. N. (1998). Structural Behavior of Composite RC Beams with Externally Bonded CFRP. Journal of Composites for Construction, 2(3), 132–137.
https://doi.org/10.1061/(ASCE)1090-0268(1998)2:3(132) . - Sun, W., Liu, S., & Zhang, C. (2020). An effective improvement for enhancing the strength and feasibility of FRP spike anchors. Composite Structures, 247, 112449.
https://doi.org/10.1016/j.compstruct.2020.112449 . - Wang, Y., Zheng, H., Chen, H., Chen, Z., & Zhuang, N. (2024). Experimental and numerical study on the flexural properties of RC beams with different CFRP-strengthened schemes. Journal of Building Engineering, 97, 110734.
https://doi.org/10.1016/j.jobe.2024.110734 . - Zhou, C., Guo, Y., Wang, Y., He, X., & Xiong, Z. (2020). Flexural Behaviour of Narrow RC Beams Strengthened with Hybrid Anchored CFRP Sheets. Journal of Advanced Concrete Technology, 18(3), 54–66.
https://doi.org/10.3151/jact.18.54 .
DOI: https://doi.org/10.2478/cee-2027-0024 | Journal eISSN: 2199-6512 (formerly 1336-5835) | Journal ISSN: 1336-5835
Language: English
Submitted on: Jul 24, 2026
Accepted on: Aug 24, 2026
Published on: Oct 16, 2026
Published by: University of Žilina
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
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© 2026 Ali A. Sultan, Mohammed A. Mashrei, Shifaa N. A. Hussain, Raed Abdul Hassan Ali, published by University of Žilina
This work is licensed under the Creative Commons Attribution 4.0 License.