Investigation of retrofitting RC moment resisting frames with ADAS yielding dampers

Many buildings require reinforcement for various reasons including earthquake damage, change in design regulations and occupancy, adding stories, and lack of proper construction. One of the retrofitting systems that, in addition to increasing the lateral strength, provide the structure with significant ductility is the ADAS yielding damper and is of great interest today. The main objective of this research is to numerically investigate the effects of ADAS plates and columns’ axial loads on the seismic parameters of reinforced concrete (RC) moment resisting frames. Therefore, based on 48 calibrated numerical models, the Pushover analysis was performed and the effects of axial force and number of ADAS plates on the seismic parameters of the frame such as effective stiffness, ultimate strength, energy dissipation, and ductility were investigated. In addition, analytical relationships were presented to determine the ultimate strength and stiffness of the reinforced frame. The results show that the number of ADAS plates should be determined in such a way so that the shear strength of the RC frame is at most about 3 times greater than that of the original concrete frame. © 2018, Springer Nature Switzerland AG.