Performance recovery of a repaired 4?storey reinforced concrete structure subjected to shake?table testing

Understanding the effects of repair on reinforced concrete (RC) structures is critical to evaluating their performance in future earthquakes. In this research, a system-level approach taken by repairing previously damaged ¼ scale 4-storey RC structure and subjecting it series dynamic excitations via shake table testing. The was undertaken using common construction materials with primary motivation restoring original performance. repaired compared that prior repairs. It found overall initial stiffness recovered 66% generally higher floors where more intensive works were undertaken. Damping capacity quantified equivalent viscous damping ratio three different methods. Regardless calculation method, recovery around 80% for low-moderate drifts 100% high drifts. While collapse not induced structure, drift demands over 5% could be achieved both before after repairs, suggesting full practical deformation capacity. Structural strength 17% than structure.