Analytical study of perforation damage in reinforced concrete slabs subjected to oblique impact by projectiles with different nose shapes

Abstract

Considerable research has been carried out to establish a rational assessment method for nuclear power plants against external projectile impact. Most of the empirical formulas have been proposed to quantitatively investigate local damage to reinforced concrete (RC) structures caused by rigid projectile impact. These formulas were derived based on impact tests performed normal to the target structure, while only a few impact tests oblique to the target structure were studied. This work aims to propose a new formula for evaluating local damage to RC structures caused by oblique impact based on experimental and simulation results. At present, we have validated an analytical method via comparison with experimental results and have conducted simulation analyses of oblique impact assessments on RC slabs using projectile with flat nose shape. In this study, the same analytical method will be used to investigate perforation damage to RC slabs subjected to oblique impact by projectiles with hemispherical nose shape. The effect of projectile nose shape on perforation damage to RC slabs, the residual velocity of projectiles and the time history of energy transmission will be discussed.

Keywords

• reinforced concrete (rc) structure
• oblique impact
• perforation damage
• ls-dyna
• residual velocity
• hemispherical nose shape