Numerical Modeling and Structural Analysis of a Modular Reinforced Concrete Shelter

This study presents numerical modelling and structural assessment of a modular prefabricated reinforced concrete shelter. The initial configuration with 160 mm walls was compared with a modernized design using 330 mm C25/30 concrete walls. Regulations in Ukraine and five European countries were reviewed to contextualize thickness requirements. Structural checks under equivalent quasi-static blast-wave loading were performed in accordance with Ukrainian standards and Eurocode 2 using IDEA StatiCa. The 160 mm design showed insufficient bearing capacity, whereas the 330 mm configuration satisfied the adopted strength criteria. Although increased thickness reduced the calculated reinforcement demand, minimum code-prescribed detailing must be maintained. Further verification is needed for precast joints, local penetration, concrete spalling and dynamic blast response.