Response of Thin Reinforced Concrete Slab under Elevated Temperature against Large Mass Impactor ABSTRACTThe response of reinforced concrete slab against large mass impact is being attention for the industry as well as commercial applications for a long time. It was observed that many industrial problems require the vulnerability assessment since large mass of hard objects traveling with low velocities on relatively thin concrete slabs. Therefore, this manuscript focuses on the penetration and perforation of thin concrete plates impacted normally by cylindrical impactor with flat nose. The numerical investigations have been carried out on thin reinforced concrete plates using ABAQUS/Explicit finite element program. The thickness of reinforced concrete plate was varied as 20 and 40 mm and the mass of impactor was 4 and 32 kg and impacted by 8.14 m/s velocity. The reinforcement of 6 mm diameter of single layer placed 90 mm spacing at both the directions. The span of the target is 400 mm and their boundaries were clamped tightly. The inelastic behavior of concrete and steel reinforcement bar has been incorporated through JohnsonHolmquist damage (JH2) model and Johnson-cook (JC) models available in ABAQUS, respectively were considered in the present study. The temperatures of target was varied as 293, 500, 900 and 1300 K. The results were predicted and discussed in terms of reaction force, residual velocity, damage intensity and von-Mises stresses on target. The study thus presents a detailed numerical investigations of the material behavior under large masses and leads to some important conclusions pertaining to the mechanics during the interaction of penetrator and target. KEYWORDS: Thin reinforced concrete slab, Deformation and Damages, Impactor mass, Elevated temperature.
