In this study, an existing nonlinear concrete constitutive model was improved and applied to local damage analyses of concrete structures subjected to low to high velocity impacts. The yield surface and the tensile softening model were modified, and the parameters in the model were determined through numerical analyses of compression tests. Dynamic strength, wave propagation, and local damage were also considered with the improved model. Finally impact test simulations from low to high velocities were conducted, and it was confirmed that the improved model can reproduce the time history response of the concrete slab and local damage such as penetration, scabbing, perforation, and deep penetration. The effect of the numerical erosion criteria proposed in the past was also discussed.
