A proposal for verification method of flexural-failure type RC beams under impact loading following performance-based design concept

In order to establish a verification method for performance-based impact resistant design method for flexural-failure type RC beams, experimental data of total thirty-six RC beams under single impact loading whose dimensions of cross-section, main rebar ratio and clear span were varied and bending-shear capacity ratio is more than 1.5, were accumulated. In order to verify the load-carrying capacity of the RC beams from service limit sate to ultimate limit state, data for wide range of each parameter were considered as: 2.4 to 14.7 kJ input impact energy; 300 to 500 kg mass of heavy weight for falling-weight impact loading; and 4 to 7.7 m/s impact velocity. From this study, it is confirmed that: input impact energy is proportional to residual displacement of RC beams; and static load-carrying capacity for verifying impact resistant capacity of the RC beam for required limit state can be evaluated using that relationship