BLAST LOADING ON REINFORCED CONCRETE STRUCTURAL ELEMENTS

Abstract

In present study, finite element modelling of reinforced concrete slab have been done using concrete damage plasticity model in ABAQUS/EXPLICIT. Comparison of modeling results and experimental results has been done. Deflection for varying standoff distance, varying charge weight, varying percentage reinforcement and slab thickness has been shown. Blast load is accidental force for the structures like factories or mines, or can be anti-social force like terrorism. Such loading exerts a high intensity pressure with much shorter distance. Hence important buildings or bunkers has to be designed for overall safety and to prevent fatal damage. Due to high stresses and strains, material behavior of concrete and steel is very complex to be predicted. Material modelling has discussed with the help of numerical simulation. The study carried out on a reinforced concrete slab having concrete of grade of M40. Two charge weights of 0.46kg and 0.31kg has been used at a standoff distance of 0.4m each. This problem is taken from the literature and after numerically validating the problem, effect of the variations have been seen. EOS JWL and Ideal gas have been used for Eulerian elements. ABAQUS/EXPLICIT have been used for the simulations. Analysis results are in the form of pressure and deflection. As the variation of pressure and deflection limits within 18% which represents adequacy of the consitutive models for blast loads