Identifying the evolution of through cracks in iron-reinforced hollow slabs under the influence of a standard fire temperature mode
DOI:
https://doi.org/10.15587/1729-4061.2024.310520Keywords:
fire resistance, integrity, hollow slab, combustion products, through cracks, finite element modelAbstract
The object of this study is the fire resistance of reinforced concrete hollow slabs at the onset of the limit state of loss of integrity. The problem of accurate modeling of the formation and development of cracks in concrete was investigated.
The paper reports an analysis of the results of the stress-strain state of a reinforced concrete hollow slab during fire exposure for devising a method for evaluating the fire resistance of such structures upon the onset of the limit state of loss of integrity.
According to EN 1992-1-2, the determination of fire resistance of structures is provided by calculation methods, however, there is no such procedure for reinforced concrete hollow slabs. Many scientific works offer refined methods for evaluating only the loss of load-bearing and heat-insulating capabilities, leaving aside the issue of loss of integrity. Thus, this can lead to a biased evaluation of reinforced concrete hollow floor slabs according to the criterion of the limit state of loss of integrity, which in turn can put under a threat to the fire safety of buildings, which threatens the life and health of people.
According to the results of the calculation, a parameter has been determined, according to which the onset of the limit state of fire resistance, in particular, the loss of integrity, was established. Summarizing the damage distributions, it was assumed that in the case of reaching the critical plastic deformation of 2.5e-3 in concrete finite elements, they are excluded from the general set of finite elements. Thus, in the case of the formation of through cracks, the removal of finite elements is taken as a parameter to identify the onset of the limit state of loss of integrity. According to the results of the computational experiment, it was established that through cracks in a fragment of a reinforced concrete hollow slab are formed in 44 min. According to the results of the research, the method of evaluating the fire resistance of such structures based on the onset of the limit state of loss of integrity has been substantiated. Such a method could be applied during design, which provides an opportunity to determine the limit of fire resistance in reinforced concrete hollow slabs
References
- Eisa, A. S., Aboul-Nour, L. A., El-Ghamry, A., Zeleňáková, M., Katunský, D. (2024). Flexural behavior of two-layer reinforced concrete slab with hollow cores. Advances in Mechanical Engineering, 16 (2). https://doi.org/10.1177/16878132231224940
- Kátai-Urbán, L., Cimer, Z., Lublóy, É. E. (2023). Examination of the Fire Resistance of Construction Materials from Beams in Chemical Warehouses Dealing with Flammable Dangerous Substances. Fire, 6 (8), 293. https://doi.org/10.3390/fire6080293
- Nuianzin, O., Pozdieiev, S., Sidnei, S., Kostenko, T., Borysova, A., Samchenko, T. (2023). Increasing the Efficiency and Environmental Friendliness of Fire Resistance Assessment Tools for Load-Bearing Reinforced Concrete Building Structures. Ecological Engineering & Environmental Technology, 24 (4), 138–146. https://doi.org/10.12912/27197050/161923
- Wang, Y., Bisby, L. A., Wang, T., Yuan, G., Baharudin, E. (2018). Fire behaviour of reinforced concrete slabs under combined biaxial in-plane and out-of-plane loads. Fire Safety Journal, 96, 27–45. https://doi.org/10.1016/j.firesaf.2017.12.004
- Nuianzin, O., Pozdieiev, S., Hora, V., Shvydenko, A.Samchenko, T. (2018). Experimental study of temperature mode of a fire in a cable tunnel. Eastern-European Journal of Enterprise Technologies, 3 (10 (93)), 21–27. https://doi.org/10.15587/1729-4061.2018.131792
- Kildashti, K., Katwal, U., Tao, Z., Tam, V. (2024). Numerical simulation of steel-concrete composite beams and slabs at elevated temperatures. Engineering Structures, 315, 118297. https://doi.org/10.1016/j.engstruct.2024.118297
- Drury, M. M., Quiel, S. E. (2023). Standard versus natural fire resistance for partially restrained composite floor beams: 2-Analysis. Journal of Constructional Steel Research, 202, 107767. https://doi.org/10.1016/j.jcsr.2022.107767
- Kassem, A. T. (2018). Deformations of R.C.Circular Slabs in Fire Condition. Civil Engineering Journal, 4 (4), 712. https://doi.org/10.28991/cej-0309126
- Wang, Y., Yuan, G., Huang, Z., Lyu, J., Li, Q., Long, B. (2018). Modelling of reinforced concrete slabs in fire. Fire Safety Journal, 100, 171–185. https://doi.org/10.1016/j.firesaf.2018.08.005
- Pozdieiev, S., Sidnei, S., Nekora, O., Subota, A., Kulitsa, O. (2023). Study of the Destruction Mechanism of Reinforced Concrete Hollow Slabs Under Fire Conditions. Smart Technologies in Urban Engineering, 447–457. https://doi.org/10.1007/978-3-031-46877-3_40
- World Fire Statistics. Available at: https://www.ctif.org/world-fire-statistics
- Sidnei, S., Nuianzin, V., Kostenko, T., Berezovskyi, A., Wąsik, W. (2023). A Method of Evaluating the Destruction of a Reinforced Concrete Hollow Core Slab for Ensuring Fire Resistance. Journal of Engineering Sciences, 10 (2), D1–D7. https://doi.org/10.21272/jes.2023.10(2).d1
- Walls, R. S., Viljoen, C., de Clercq, H. (2018). Analysis of Structures in Fire as Simplified Skeletal Frames Using a Customised Beam Finite Element. Fire Technology, 54 (6), 1655–1682. https://doi.org/10.1007/s10694-018-0762-7
- Meschke, G, Macht, J, Lackner, R. (1998). A damage-plasticity model for concrete accounting for fracture-induced anisotropy. Computational modelling of concrete structures: Proceedings of the EURO-C 1998 Conference on Computational Modelling of Concrete Structures. Badgastein.
- Klemczak, B. (2007). Adapting of the willam-warnke failure criteria for young concrete. Archives of Civil Engineering, 53, 323–339.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 Stanislav Sidnei, Oleh Myroshnyk, Andrii Kovalov, Roman Veselivskyi, Kostiantyn Hryhorenko, Taras Shnal, Ihor Matsyk
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.
