PSI - Issue 72

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ScienceDirect

Procedia Structural Integrity 72 (2025) 210–215

12th Annual Conference of Society for Structural Integrity and Life (DIVK12) Work of steel fiber reinforced concrete beams under the action of repeated loads: an experimental study Serhii Drobyshynets a , Pavlo Sunak a , Igor Melnyk b, *, Andriy Pelekh b , Vasyl Rizak c , Oksana Mykaylo c , Mykhailo Nesukh c , Oleh Kukhniuk d

a Lutsk National Technical University, Lvivska 75, 43018 Lutsk, Ukraine b Lviv Polytechnic National University, S. Bandery 12, 79013, Lviv, Ukraine c Uzhhorod National University, 14 University Str., 88000 Uzhgorod, Ukraine d National University of Water and Environmental Engineering, Soborna 11, 33000 Rivne, Ukraine

Abstract The features of the behaviour of steel fiber reinforced concrete beams under short-term and low-cycle loading are presented. The failure of the beams occurred along normal cross-sections gradually due to the attainment of ultimate deformations in the reinforcement. The stabilization of compression deformations in steel fiber-reinforced concrete, tensile deformations in the reinforcement, and beam deflections at   0,75 occurs within 5 – 7 loading-unloading cycles. The load-bearing capacity of steel fiber reinforced concrete beams has been determined. The characteristics of crack formation in the studied beams have been analyzed. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia

Keywords: beam, bending element; stress-strain state; steel fiber reinforced concrete; deformation; carrying capacity; strength

1. Introduction Materials based on concrete (Konkol (2019); Dvorkin et al. (2021); Iskhakov et al. (2023); Dovbenko et al. (2024); Protsiuk et al. (2023)), metal (Kovalchuk et al. (2017)), wood (Homon et al. (2024); Aleksiievets et al. (2024); Pavluk

* Corresponding author. Tel.: +38-067-855-71-71. E-mail address: melnyk_igor2024@ukr.net

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.094