Application Analysis of Seismic Isolation Devices on Longitudinal Seismic Response of Floating System Cable stayed Bridge

Abstract:

On the background of a double pylon cable stayed bridge of floating system, the aseismic characteristics of cable displacement restrainers and viscous dampers was compared. The effect of hybrid application of cable displacement restrainers and viscous dampers on the longitudinal seismic response of floating system cable stayed bridge was discussed. The results show that the cable displacement restrainer is able to control the displacement response effectively compared with the viscous damper, but the viscous damper has certain advantages in the internal force control. The hybrid application can achieve the goal that cable displacement restrainers control the displacement at beam ends and viscous dampers improve the force situation at the tower bottom, which is a more cost effective seismic measure and has an excellent earthquake mitigation effect under pulse ground motions.