Experimental study of BFRP-RC beams exposed to elevated temperatures
Nour GHAZAL ASWAD, Mohammed AL DAWOOD, Farid ABED, Ahmed EL REFAI
Abstract. Fiber-reinforced polymer (FRP) reinforcement has been widely adopted due to its superior mechanical properties and durability compared to conventional steel reinforcement. However, the fire performance of FRP-Reinforced Concrete (RC) members remains uncertain due to a lack of consistency in the limited available experimental results on concrete structural members with FRP subjected to elevated temperatures. This study consequently presents the flexural test results of eight steel and Basalt FRP (BFRP) RC prismatic beams exposed to elevated temperatures. The beams were subjected to target temperatures of 200, 400, and 700ºC before undergoing flexural testing. The experimental results revealed that the load-carrying capacity of steel RC beams decreased by a maximum of 35.5% at 400°C, while BFRP RC beams showed a 66.1% reduction at 700°C compared to those at room temperature. Overall, steel RC prismatic beams demonstrated a load-carrying capacity up to 60.5% higher than that of BFRP RC prismatic beams at all temperatures. Hence, beams with steel reinforcement can better withstand elevated temperatures compared to those with BFRP reinforcement, while BFRP RC beams still demonstrate acceptable performance.
Keywords
BFRP, Elevated Temperatures, Fire, Flexure, Prisms
Published online 2/25/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Nour GHAZAL ASWAD, Mohammed AL DAWOOD, Farid ABED, Ahmed EL REFAI, Experimental study of BFRP-RC beams exposed to elevated temperatures, Materials Research Proceedings, Vol. 48, pp 86-92, 2025
DOI: https://doi.org/10.21741/9781644903414-10
The article was published as article 10 of the book Civil and Environmental Engineering for Resilient, Smart and Sustainable Solutions
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] F. Abed, N. Ghazal Aswad, and K. Obeidat, “Effect of BFRP ties on the axial performance of RC columns reinforced with BFRP and GFRP rebars,” Compos Struct, vol. 340, p. 118184, Jul. 2024. https://doi.org/10.1016/j.compstruct.2024.118184
[2] T. Morgado, J. R. Correia, N. Silvestre, and F. A. Branco, “Experimental study on the fire resistance of GFRP pultruded tubular beams,” Compos B Eng, vol. 139, pp. 106–116, Apr. 2018. https://doi.org/10.1016/J.COMPOSITESB.2017.11.036
[3] K. H. Tan and Y. Zhou, “Performance of FRP-Strengthened Beams Subjected to Elevated Temperatures,” Journal of Composites for Construction, vol. 15, no. 3, pp. 304–311, Jul. 2010. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000154
[4] Y. Alhoubi, Z. Mahaini, and F. Abed, “The Flexural Performance of BFRP-Reinforced UHPC Beams Compared to Steel and GFRP-Reinforced Beams,” Sustainability 2022, Vol. 14, Page 15139, vol. 14, no. 22, p. 15139, Nov. 2022. https://doi.org/10.3390/SU142215139
[5] J. Prokeš, I. Rozsypalová, F. Girgle, P. Daněk, and P. Štěpánek, “Effects of elevated temperature on the behaviour of concrete beams reinforced with fiber reinforced polymers,” IOP Conf Ser Mater Sci Eng, vol. 1039, no. 1, p. 012008, Jan. 2021. https://doi.org/10.1088/1757-899X/1039/1/012008
[6] H. Hajiloo, M. F. Green, and J. Gales, “Mechanical properties of GFRP reinforcing bars at high temperatures,” Constr Build Mater, vol. 162, pp. 142–154, Feb. 2018. https://doi.org/10.1016/J.CONBUILDMAT.2017.12.025
[7] C. Li, D. Gao, Y. Wang, and J. Tang, “Effect of high temperature on the bond performance between basalt fibre reinforced polymer (BFRP) bars and concrete,” Constr Build Mater, vol. 141, pp. 44–51, Jun. 2017. https://doi.org/10.1016/J.CONBUILDMAT.2017.02.125
[8] F. Abed, Z. Elnassar, W. Abuzaid, and Y. Alhoubi, “Response of GFRP bars at different temperatures,” in Materials Research Proceedings, Association of American Publishers, 2023, pp. 1–6. https://doi.org/10.21741/9781644902592-1
[9] F. Abed, Z. Elnassar, W. Abuzaid, and Y. Alhoubi, “Compressive response of GFRP and BFRP bars at different temperatures and quasi-static rates,” Mechanics of Advanced Materials and Structures, 2023. https://doi.org/10.1080/15376494.2023.2280856
[10] ASTM, Standard specification for deformed and plain carbon-steel bars for concrete reinforcement. West Conshohocken, PA: ASTM A615/A615M-18e1, 2018.
[11] ASTM, Standard test method for tensile properties of fiber reinforced polymer matrix composite bars. West Conshohocken, PA: ASTM D7205/D7205M-06, 2016.
[12] ASTM (American Society for Testing and Materials) Committee, Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (Using Beam With Third-Point Loading) (ASTM C1609/C1609M), no. C 1609/C 1609M-07. Pennsylvania, 2007. https://doi.org/10.1520/C1609
