Residual Strength of Reinforced Concrete Beams under Sequential Small Impact Loads

Sequential small impact loads may not collapse structures directly but could weaken the strength of structures. This study aimed to investigate these sequential on reinforced concrete beams. First, six were applied test specimens. Then, residual static capacity impacted specimens was determined by ultimate load test, compared with those undamaged The experiment composed 12 having identical dimensions. variable parameters magnitude axial and shear reinforcement. Under impacts, improves performance. It reduces tensile strain longitudinal Hence, flexural crack propagation is limited. In addition, local damage at location minimized plug induced diagonal prevented. force also able diminish adverse effect large spacing stirrups. Large alter failure a designed critical beam without failure. Although response, Residual Resistance Index (RRI) decreases load. For damaged load, lower than calculated more severe cracks found. can be obviously said that prior capacity.