AN INVESTIGATION INTO SEISMIC PERFORMANCE OF TUNED MASS DAMPERS

This paper investigates the effective parameters on seismic efficiency of tuned mass dampers, TMD, in dual systems of moment resisting frame and cross bracing with 15, 20 and 25 stories. TMDs with different mass ratio were located at different heights. Non-linear time history analyses were conducted under three earthquake records. The results showed that the reduction of base shear is significant at all the cases, and by increasing the number of stories, reduction of the base shear is increased. However, in terms of displacement and acceleration of the roof, TMD could be very sensitive to its parameters.