Revealing the effect of explosion on the performance of reinforced concrete structures in protective shelters under air attacks
DOI:
https://doi.org/10.15587/1729-4061.2026.360862Keywords:
explosive load, explosion resistance, protective shelters, concrete structures, stressed-strained state, LS-DYNAAbstract
This study explores reinforced concrete structures at the UFS-1 and SHS VS-1-3 series block protective facilities under explosive conditions. The task addressed relates to the insufficiently studied patterns of their stressed-strained state taking into account contact interaction between structural elements and the soil base.
To solve the specified task, numerical modeling was performed using the finite element method. Calculations were carried out in the LS-DYNA software package (USA) taking into account physical and geometric nonlinearity and contact interaction of structural elements. The functional suitability of reinforced concrete structures at block protective facilities under explosive conditions was investigated.
The explosive impact scenarios provided for a TNT equivalent charge of 15 kg at distances to the structure of 0.55 m and 5 m. The calculation results showed that the maximum values of excess pressure reach 1.16 · 106 kPa and 1.01 · 103 kPa, respectively. It was found that the greatest stresses and displacements are localized in the junctions of blocks and near-surface areas of structures, which made it possible to identify the most vulnerable elements and justify directions for improving structural solutions.
It was found that at the assumed values of explosive effects, the facilities retain their functional suitability and stability while damage is localized in small areas and does not lead to progressive destruction of the shelter. This is explained by the spatial work of the structure and the redistribution of dynamic forces among individual blocks and the soil base.
The research results could prove useful for assessing explosion resistance and implementing engineering solutions in the design of civil defense structures with the aim of improving them
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Copyright (c) 2026 Serhii Pozdieiev, Volodymyr Bashynskyi, Andrii Shvydenko, Serhii Bisyk, Serhii Holets, Olga Nekora, Oleh Dmitriiev, Volodymyr Krivtsun, Viktor Nikitchenko, Ihor Chastokolenko
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