Defining patterns in heating a reinforced concrete column under the effect of a standard fire temperature regime
DOI:
https://doi.org/10.15587/1729-4061.2026.352324Keywords:
fire, reinforced concrete, column, fire exposure, temperature, sensors, measurements, experiment, combustionAbstract
This study investigates the process of heating a fragment of a reinforced concrete column under standard fire temperature conditions. The task addressed relates to the lack of data on temperatures at characteristic points of the cross-section of reinforced concrete columns during their heating according to the standard temperature curve, which complicates the refinement of calculation models of heat transfer and assessment of fire resistance of structures.
This paper identifies the features of heating a fragment of a reinforced concrete column based on the results of experimental tests in a small-sized fire furnace without applying mechanical load. Temperatures were recorded at six characteristic points of the cross-section of the studied sample, in particular at the level of the reinforcement, in the center of the cross-section, at the control point of the semi-diagonal, and at points close to the concrete surface. It was established that the maximum temperatures at the surface points reached 528°C, and in the reinforcement zone – 506°C, while in the central part of the cross-section they were equal to 468–487°C.
The results showed the absence of local overheating in the planes of thermocouple placement, the formation of a regular temperature gradient in the concrete cross-section during standard fire exposure. A feature of the results is the experimental determination of temperatures at several characteristic points of the column cross-section, which allows a more accurate assessment of the real temperatures in the reinforcement and concrete during a fire.
The findings are associated with the radiation-convective heat exchange between the concrete surface and the flame, as well as with the relatively low thermal conductivity and thermal inertia of the concrete material. Statistical processing of the results showed that the relative deviation of temperature values does not exceed 6.7% while the values of the Cochrane Fisher and Student criteria are less than critical.
The obtained experimental data could be used to further determine the fire resistance limit of reinforced concrete columns and refine the calculation models of heat transfer
Supporting Agency
- Дослідження проводилося без фінансової підтримки.
References
- Nuianzin, O. (2022). Study of fire thermal effect on a reinforced concrete beam according to the results of experimental tests. Nadzvychaini sytuatsiyi: poperedzhennia ta likvidatsiya, 6 (1), 75–84. Available at: https://repositsc.nuczu.edu.ua/bitstream/123456789/21044/1/Nuianzin%2025.pdf
- Yanishevskyi, V., Perehin, A. (2024). Algorithm for application of improved experimental and calculation method for assessing fire resistance limits of load-bearing reinforced concrete walls. Emergency Situations: Prevention and Liquidation, 8 (2). https://doi.org/10.31731/2524.2636.2024.8.2.167.180
- Bai, L. L., Song, T. (2012). Failure Analysis of Reinforced Concrete Columns after High Temperature. Applied Mechanics and Materials, 157-158, 1578–1581. https://doi.org/10.4028/www.scientific.net/amm.157-158.1578
- Dmytrenko, Y., Donets, T., Odnolitok, K., Fesenko, O. (2021). Fire resistance assessment of RC columns with advanced calculation methods. Building Constructions. Theory and Practice, 8, 82–96. https://doi.org/10.32347/2522-4182.8.2021.82-96
- Yang, D., Liu, F., Huang, S.-S., Yang, H. (2020). ISO 834 standard fire test and mechanism analysis of square tubed-reinforced-concrete columns. Journal of Constructional Steel Research, 175, 106316. https://doi.org/10.1016/j.jcsr.2020.106316
- Krishna, D. A., Priyadarsini, R. S., Narayanan, S. (2019). Effect of Elevated Temperatures on the Mechanical Properties of Concrete. Procedia Structural Integrity, 14, 384–394. https://doi.org/10.1016/j.prostr.2019.05.047
- Al-Jadiri, M. S. F., Said, A. M. I. (2023). Reinforced Concrete Columns Insulated by Different Gypsum Layers Exposed to 900°C One Side Fire Flame. Engineering, Technology & Applied Science Research, 13 (5), 11586–11592. https://doi.org/10.48084/etasr.6083
- Cao, V. V., Ngo, S. T. (2024). Residual axial strength of reinforced concrete columns after exposure to standard and non-standard fires. Advances in Structural Engineering, 27 (5), 709–721. https://doi.org/10.1177/13694332241232048
- Prakash, R. S., Parthasarathi, N. (2025). Experimental and numerical study on FRP-rehabilitated RC beam-column joints at high temperature with artificial neural network. Scientific Reports, 15 (1). https://doi.org/10.1038/s41598-025-16055-9
- Perehin, A., Nuianzin, O., Borysova, A., Nuianzin, V. (2022). Results of Experimental Investigations of Reinforced Concrete Wall Elements According to the Standard Temperature Mode of Fire. Materials Science Forum, 1066, 206–215. https://doi.org/10.4028/p-18th69
- Perehin, A., Nuianzin, O., Shnal, T., Shchipets, S., Myroshnyk, O. (2023). Improvement of means for assessing fire resistance of fragments of reinforced concrete structures. Reliability and durability of railway transport engineering structure and buildings. https://doi.org/10.1063/5.0120061
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 Vadym Yanishevskyi, Alina Perehin, Serhii Gonchar, Oleksandr Nuianzin, Oleh Zemlianskyi, Oleksandr Olefirenko
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
