PSI - Issue 81

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ScienceDirect

Procedia Structural Integrity 81 (2026) 310–315

© 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers Keywords: Reinforced Concrete; Bending Elements; Dynamic Loads; Strain Rate; Strength Abstract The article is devoted to predicting the strength of reinforced concrete elements and structures under dynamic loads of varying intensity. A simplified express method for calculating the strength of flexural reinforced concrete elements and structures in a wide range of their loading is proposed: from standard static to instantaneous dynamic. The basis of this method is a generally recognized system of equations, which is formed using certain static, geometric and physical ratios of the parameters of the stress-strain state of reinforced concrete elements and structures at the moment of their loss of strength. Using the dynamic increase factors of concrete and reinforcement, the influence of the strain rate (load) of flexural reinforced concrete elements on their strength is estimated. 1. Introduction In today's wars and military conflicts, the probability of massive use of missiles and unmanned aerial vehicles with different warheads and different ranges of action is sharply increasing. Under such circumstances, almost all buildings and structures (residential, public and even industrial) must be completely designed as defensive, which is practically impossible. A real alternative to this is the design and construction of separate capital defensive structures on the territory of residential, public complexes or industrial enterprises. And even with such an approach to the specified problem, it is necessary to be able to assess the capabilities of other buildings and structures to resist means of destruction (shells, blast waves or individual fragments). Modern methods for calculating reinforced concrete elements and structures for the resistance of reinforced concrete elements and structures to shock and explosive loads are extremely cumbersome, and therefore can be implemented only with the help of complex software packages. Simplified express methods for calculating reinforced concrete elements and structures for the action of dynamic loads practically do not exist. The availability of such methods would allow, albeit approximately, but very quickly, to predict the zones and scales of destruction and critical damage of reinforced concrete elements and structures in buildings and structures. Such methods should be analytically justified and methodologically universal (cover the most different classes of concrete and types of loads) and be implemented using the simplest engineering programs. VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Predicting the strength of bending reinforced concrete elements under dynamic loads OlenaRomashko-Maistruk, Vasyl Romashko* a National University of Water Management and Environmental Engineering, Soborna 11, Rivne 33028, Ukraine

* Corresponding author. Tel.: +380-97-595-75-91. E-mail address: romashkovasyl@gmail.com

2452-3216 © 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers 10.1016/j.prostr.2026.03.054