Seismic Evaluation of Bridges with Multiple Tuned Mass Dampers in Parallel and Series Mode

Bridges have a special place in transportation infrastructure due to their direct connection with other places. These structures aim to carry highway traffic loads, pass any obstacle and establish effective communication between two destinations. Damages caused by earthquakes and human factors cause very serious damage to bridges, and if even the failure of a member does not cause the structure to collapse completely, the cost of retrofitting is very high. For this purpose, researchers and engineers suggested the use of structural control systems along with accurate seismic analysis to predict the behavior of the structure. The purpose of this study is to investigate the displacement in bridges using multiple tuned mass dampers in parallel and series mode. The effects of damper modeling on Meloland overpass bridge are investigated for the first time with the help of the proposed method in this article. In this research, the bridge structure presented by Vahid Shirgir et al. is used as a sample structure to investigate the issues raised with Opensees software. This bridge is designed by taking into account the regulations, gravity and dynamic loads, and its structural specifications include dimensions, type of materials used based on the article of Vahid Shirgir et al. Finally, it was found that the multiple tuned mass damper in parallel mode has a better performance in reducing the maximum displacement than other tuned mass dampers. Also, according to the results, the response of the structure equipped with multiple tuned mass dampers decreased by 21% and improved the seismic performance level of the bridge column.