Nonlinear Response of RC Columns Subjected to Equal Energy-Double Impact Loads

Defining the damage and deflection from impact by using only energy could be misleading due to effect of momentum. In addition, reinforced concrete columns might subjected repeated loading. Hence, this study presents numerical simulation 16 RC with identical sizing reinforcement details, equal energy-double loadings a free-falling mass at midspan. The was kept constant for both impacts. For each analysis, momentum varied varying velocity impactor. axial load ratios are between 0.0 0.3 compressive strength cross-section. results clearly addressed on responses. level affected specimens’ behavior under same input energy. A high yielded more global flexural large deflection, low produced local slight deflection. helps maintain resistance capacity. However, failure determined pattern first changed when second shear mode presence load. Further, colliding index considering used in prediction equation. proposed equation improved calculation accuracy beams but different impact.