EFFECT OF DAMPER ON SEISMIC RESPONSE OF CABLE-STAYED BRIDGE USING ENERGYBASED METHOD

Bridges are a vital element of transportation networks. As any disorder in the maintenance or utilization of bridges may cause irrecoverable incidents, the vulnerability of bridges to earthquakes must be seriously considered. Dampers are extensively used in the handling of earthquake forces; however, their optimization and optimal location have not been clarified. Considering the unjustified use of forcedisplacement design methods in the seismic design of important structures, such as bridges, the use of an energy-based approach with nonlinearly behaving materials and the concept of hysteretic energy are more rational and practical. Therefore, in this study, the effect of dampers and their location on the seismic response of cablestayed bridges is investigated by an energy-based method. For this purpose, a case study is examined via a numerical study. The results indicate that, to reduce the bridge's seismic response to earthquake forces, a damper installed between the deck and pylon is more effective than a damper installed on the cables