Mechanical behavior of reinforced concrete under dynamic loading

Based on the experimental results of a drop-weight impact test on reinforced concrete beams, the damage visco-elastic constitutive model has been proposed to describe the dynamic behavior of reinforced concrete. In view of the influence of the rebar and the damage characteristics of the beam, the reinforced multiplier and damage variable were introduced into the model to modify the constitutive model in such a way that it might be quantitatively described. Thus a constitutive model containing such control variables as strain, strain rate, damage and reinforcement ratio was obtained and then applied to the analysis of the fracture of the non-elastic bent beam. Numerical predictions were compared with the experimental deflection-time relationships, which shows a very good agreement with the experimental results.