Abstract: “With the growing construction of long-span bridges, the seismic response analysis of cable-stayed bridges have become a critical issue in engineering communities. Application of seismic isolation systems is a prominent way to improve the seismic performance of cable-stayed bridges. This paper investigates the performance of high damping rubber (HDR) bearings as seismic control systems for cable-stayed bridges. The design information of Tatara Bridge in Japan is considered for finite element (FE) modeling procedure. The time history method is applied for the seismic analysis. The seismic behavior of uncontrolled bridge is compared with the corresponding responses of isolated bridge to find out the efficiency of the control system. The results of investigations show that the addition of HDR bearings improve the seismic forces in cable-stayed bridges; however, the application of the isolation system increase the displacement response of the isolated bridge during the earthquake.”

Keywords: seismic response, cable-stayed bridge, isolation system , high damping rubber (HDR) bearing