Finite-Element Analysis of Reinforced Concrete Target Against Blast Loading

Civil and military infrastructure has been exposed to the potential of terrorist attacks using portable detonation devices and explosives; thus, the performance of common structural components and materials subjected to blast loading must be determined. To test the RCC slab’s resistance to damage, numerical research was performed on it while subjected to near-field blast loading. TNT explosive was used to create an explosion on a 1.3 m × 1.0 m × 0.1 m target. The explosive was detonated from various standoff distances equating to 0.079–0.135 kg/m1/3. In the modeling of concrete and steel, the concrete damage plasticity and Johnson–Cook plasticity models were utilized, respectively. The results demonstrated that the target slab’s one-way bending and splitting resulted in a crater with clear visibility. The explosion pressure grows as the weight of the explosives increases, transforming localized failure into globalized failure. The greatest crater is 391 mm in diameter and is measured for 0.4 kg explosive weight at 0.1 m standoff distance. The smallest crater is 100 mm in size for 6.6 kg explosive weight at 0.3 m standoff distance. The safe standoff distance for non-nuclear explosives, such as 1 kg of TNT, is 0.5 m.