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Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams

The fire resistance of fiber-reinforced polymer reinforced concrete (FRP-RC) elements depends on the temperature performance of the original concrete member, the fire scenario, and FRP reinforcement behavior. In this study, fire resistance tests are described, along with the characteristics obtained...

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Autor principal: Protchenko, Kostiantyn
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875697/
https://www.ncbi.nlm.nih.gov/pubmed/35208047
http://dx.doi.org/10.3390/ma15041509
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author Protchenko, Kostiantyn
author_facet Protchenko, Kostiantyn
author_sort Protchenko, Kostiantyn
collection PubMed
description The fire resistance of fiber-reinforced polymer reinforced concrete (FRP-RC) elements depends on the temperature performance of the original concrete member, the fire scenario, and FRP reinforcement behavior. In this study, fire resistance tests are described, along with the characteristics obtained during and after applying elevated temperatures, simulating the effects of fire. The tested beams were reinforced with basalt (BFRP) bars and with a hybrid composite of carbon fibers and basalt fibers (HFRP) bars. Fire tests were performed on full-scale beams, in which the midsections of the beams were heated from below (tension zone) and from the sides for two hours, after which the beams were cooled and subjected to flexural testing. BFRP-RC beams failed before the heating time was completed; the best failure was associated with a BFRP reinforced beam that failed approximately 108 min after heating. Contrary to the BFRP-RC samples, HFRP-RC beams were capable of resisting exposure to elevated temperatures for two hours, but showed a 70% reduction in strength capacity when compared to non-heated reference beams. According to the author, the higher resistance of HFRP-RC beams was the result of the thermal expansion coefficient of carbon fibers employed in HFRP, which “prestresses” the beams and enables smaller deflections. The preliminary findings of this study can increase the feasibility of using FRP materials for engineering purposes.
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spelling pubmed-88756972022-02-26 Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams Protchenko, Kostiantyn Materials (Basel) Article The fire resistance of fiber-reinforced polymer reinforced concrete (FRP-RC) elements depends on the temperature performance of the original concrete member, the fire scenario, and FRP reinforcement behavior. In this study, fire resistance tests are described, along with the characteristics obtained during and after applying elevated temperatures, simulating the effects of fire. The tested beams were reinforced with basalt (BFRP) bars and with a hybrid composite of carbon fibers and basalt fibers (HFRP) bars. Fire tests were performed on full-scale beams, in which the midsections of the beams were heated from below (tension zone) and from the sides for two hours, after which the beams were cooled and subjected to flexural testing. BFRP-RC beams failed before the heating time was completed; the best failure was associated with a BFRP reinforced beam that failed approximately 108 min after heating. Contrary to the BFRP-RC samples, HFRP-RC beams were capable of resisting exposure to elevated temperatures for two hours, but showed a 70% reduction in strength capacity when compared to non-heated reference beams. According to the author, the higher resistance of HFRP-RC beams was the result of the thermal expansion coefficient of carbon fibers employed in HFRP, which “prestresses” the beams and enables smaller deflections. The preliminary findings of this study can increase the feasibility of using FRP materials for engineering purposes. MDPI 2022-02-17 /pmc/articles/PMC8875697/ /pubmed/35208047 http://dx.doi.org/10.3390/ma15041509 Text en © 2022 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Protchenko, Kostiantyn
Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title_full Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title_fullStr Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title_full_unstemmed Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title_short Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams
title_sort residual fire resistance testing of basalt- and hybrid-frp reinforced concrete beams
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875697/
https://www.ncbi.nlm.nih.gov/pubmed/35208047
http://dx.doi.org/10.3390/ma15041509
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