Abstract：Perforation damage effects of thin concrete slabs produced by impact of projectile at high velocity are studied. Model test，numerical simulation，and dimension theory are employed to analyze the damage effects and the results of the three methods are well consistent. Empirical formula is derived to calculate residual velocity of projectile perforating through the thin concrete slabs. The macroscopic damage image of reinforced concrete slabs under impact effect are obtained through model test，and the residual velocity of the projectile are gained from the tests. Three-dimensional nonlinear dynamic finite element program and the brittleness damage model of concrete are introduced. The numerical simulation of damage process of experimental target slabs is accomplished. The physical processes such as penetration perforation and impact perforation of reinforced concrete slabs subjected to projectile with high speed are displayed visually. The simulation results fit well with the experimental damage image. Through dimension analysis，the dimensionless relationship between all parameters that influence the impact damage effect of reinforced concrete slabs are achieved. Regressive analysis of test data are carried out to obtain the calculation formulae for projectile residual velocities under the condition of penetration perforation or impact perforation.
