Geometrical Shape and Orientation Effect of Equivalent TNT Dose on an RCC Slab with Clamped/Simple Supports Under Contact Explosion
Purpose: Explosions, historically associated with military engineering, are now pertinent to structural engineering due to increased subversive blasts, global conflicts, civil disturbances, geopolitical volatility, and industrial accidents. Despite numerous studies using various explosives, a compre...
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Springer
2025
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| Summary: | Purpose: Explosions, historically associated with military engineering, are now pertinent to structural engineering due to increased subversive blasts, global conflicts, civil disturbances, geopolitical volatility, and industrial accidents. Despite numerous studies using various explosives, a comprehensive comparative analysis of their geometric effects on structural damage is lacking. The rationale behind researchers' choices of geometric forms and orientations remains questionable.�The main purpose of this study is to investigate the effect of geometric shape and orientation of an equivalent TNT dose on a reinforced concrete (RC) square�slab under contact explosion, with specific focus on understanding the mechanism of damage�and cracks propagation. The research question addressed is whether the geometric characteristics and orientation of the explosive significantly influence the type and extent of damage on the slab, in comparison to the boundary conditions (BCs) imposed. Methods: The investigation employs computational simulations using the Abaqus software, considering twenty-six cases with five different geometric forms of the TNT dose: brick, simple cube, spherical, hemispherical, and cylindrical. Both clamped and simple boundary conditions are studied. The integration of the Eulerian-Lagrangian methodology, in conjunction with the finite element technique within the framework of Abaqus, has been employed�for the purpose of simulating explosive events.�Experimental data from relevant literature are utilized to validate the computational predictions. Results: The findings reveal that the type and extent of damage inflicted on the slab are predominantly influenced by the geometric form and orientation of the TNT dose, rather than the boundary conditions. The study elucidates that slab damage is contingent upon the geometric characteristics and alignment of the explosive relative to the BCs. The order of damage severity among the considered geometric forms and orientations is highlighted. Conclusion: The study underscores the significance of considering both the geometric form and orientation of the explosive in relation to the slab's geometry and boundary conditions. Perforation with prevailing flexure�mode of damage is observed under clamped BC, while a combination of flexure and shear occurs under simple BC. Slabs with simple BC exhibit higher damage with more cracks compared to those with clamped BC. ? Springer Nature Singapore Pte Ltd. 2024. |
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