Overview of fire research on concrete structural elements strengthened with fiber-reinforced polymer composites

openaccess, Vol. 640 (12) 2025 / poniedziałek, 29 grudnia, 2025

Przegląd badań ogniowych betonowych elementów konstrukcyjnych wzmacnianych kompozytami z polimerów zbrojonych włóknami

(Open Access)

DOI: 10.15199/33.2025.12.09

citation/cytuj: Wydra M., Fangrat J. Overview of fire research on concrete structural elements strengthened with fiber-reinforced polymer composites. Materiały Budowlane. 2025. Volume 640. Issue 12. Pages 75-86. DOI: 10.15199/33.2025.12.09

Investigations on Fibre Reinforced Polymers (FRPs) at ambient temperature have already proven their effectiveness for strengthening concrete structural elements because of their high mechanical strength and durability. However, their performance at elevated and high temperatures requires proper understanding to enable safe design methods, as the FRPs and adhesives used to mount them are highly vulnerable to even remotely elevated temperatures. In addition, aspects related to the thermal conductivity and combustibility should be carefully considered. This article aims to present up-to-date research on reduced-scale and full-scale investigations on Externally Bonded or Near Surface Mounted FRP-strengthened concrete structural elements and conclusions on the directions of further research. In terms of mechanical performance, post-heated tests and simultaneous thermo-mechanical loading (at transient and steady states) were analysed.

Badania nad polimerami wzmocnionymi włóknami FRP (ang. Fiber Reinforced Polymer) w temperaturze otoczenia dowiodły ich skuteczności we wzmacnianiu elementów konstrukcyjnych ze względu na wysoką wytrzymałość i trwałość. Zachowanie ich w podwyższonej i wysokiej temperaturze wymaga jednak dodatkowej analizy w celu zapewnienia prawidłowych metod projektowania, ponieważ FRP i kleje używane do ich montażu są bardzo podatne na nawet nieznacznie podwyższoną temperaturę. Ponadto analizy wymagają kwestie związane z przewodnością cieplną i palnością. Celem artykułu jest przedstawienie aktualnego stanu wiedzy na temat badań wykonanych w pełnej lub zredukowanej skali geometrycznej, których przedmiotem są betonowe elementy konstrukcyjne, wzmacniane FRP zewnętrznie lub przypowierzchniowo oraz wnioski dotyczące kierunków dalszych badań. Przeanalizowano wyniki testów elementów po ogrzewaniu oraz poddanych jednoczesnemu obciążeniu mechanicznemu i termicznemu w stanach nieustalonym i ustalonym.
concrete; construction elements; fibre reinforced polymer reinforcement; fire conditions; critical review.

beton; elementy konstrukcyjne; zbrojenie z polimeru wzmocnionego włóknem; podwyższona temperatura; przegląd badań.
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dr inż. Małgorzata Wydra, Politechnika Warszawska, Wydział Budownictwa, Mechaniki i Petrochemii
ORCID: 0000-0002-4629-9656
dr hab. inż. Jadwiga Fangrat, prof. ITB, Instytut Techniki Budowlanej, Zakład Badań Ogniowych
ORCID: 0000-0002-7871-0032

dr inż. Małgorzata Wydra, Politechnika Warszawska, Wydział Budownictwa, Mechaniki i Petrochemii
ORCID: 0000-0002-4629-9656

Correspondence address: malgorzata.wydra@pw.edu.pl

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DOI: 10.15199/33.2025.12.09

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Received: 22.07.2025 / Artykuł wpłynął do redakcji: 22.07.2025 r.
Revised: 15.09.2025 / Otrzymano poprawiony po recenzjach: 15.09.2025 r.
Published: 23.12.2025 / Opublikowano: 23.12.2025 r.