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ENG: Articles of DMTS

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    Fundamentals of the Energy Approach to Explosive Effect Acting on the Constructions of Underground Structures
    (IOP Publishing Ltd, 2026) Tiutkin, Oleksii L.; Ostapenko, Igor; Hernych, Mykola
    ENG: This research analyzes current trends in calculating the construction of underground structures. It finds that, considering the objective situation, the extreme load combination (constant loads plus one extreme load) should be revised. This revision is related to an increase in cases of shock and explosive effects on the constructions of underground structures that may serve as shelters. The research aims to combine analytical foundations, which provide data on explosive effect, with a numerical analysis methodology that includes an energy approach. Solving this problem enables the analysis of the explosive effect on constructions of the underground structure, considering the overall stress-strain state within the "construction of the underground structure – surrounding massif" system. The authors present the analytical basis of the energy approach to the explosive effect acting on constructions of underground structures. Ways for implementing these foundations into the methodology of numerical analysis are described. A numerical analysis of the underground lobby construction for impulse impact, replacing the explosion, is performed, which is calculated in accordance with the given analytical formulas. A comparison is made between the deformation energy of the lobby construction – an integral parameter that includes stress and displacement – and the deterioration energy of the C25/30 concrete grade.