USING A DISCRETE ELEMENT/FINITE ELEMENT APPROACH TO MODEL IMPACT OF A RIGID PROJECTILE ON CONCRETE AND REINFORCED CONCRETE TARGETS

摘要

This paper presents a mixed numerical modelling able to predict the response of reinforced concrete (RC) structures under extreme loadings such as missile impacts. Concrete is modelled using cohesive rigid spherical discrete elements (DE), while steel reinforcement is represented by beam-like finite elements (FE). Concrete-steel DEM/FEM bond model calibrated on pull-out tests is used, which ensures forces transmitting between steel and concrete. This approach is validated through the simulation of two experiments (edge-on-impact test and drop-weight impact) involving hard impacts on plain concrete and a large RC beam. The numerical results are presented and their comparison with the experimental data is discussed.