Reducing the Seismic Response of Nonlinear Hysteretic Structures Using Optimal Multiple Tuned Mass Dampers

In this research، the effectiveness of multiple tuned mass dampers (MTMDs) in mitigating the response of nonlinear hysteretic structures has been studied where the optimal parameters of MTMDs have been determined based on minimization of maximum relative displacement (drift) of structure. For solving the optimization problem the genetic algorithm (GA) has been used successfully. For numerical analysis، an eight-storey bilinear hysteretic shear frame subjected to a white noise excitation and optimal MTMDs have been designed. The results of numerical simulations have shown the effectiveness of the proposed method in designing optimal MTMDs for nonlinear structures. Also، it can be said that the damage of structure can be reduced using optimal MTMDs where the performance has been affected by earthquake characteristics and mass ratio.