Effects of Pylon-girder Connection on Seismic Response of Three-pylon Suspension Bridge
In order to optimize the design of the seismic absorption system of a three-pylon and four-span suspension bridge,taking an actual project as an example,a numerical model was established using SAP2000 software,and the seismic performance of structures with different middle tower-main beam connection methods was comparatively ana-lyzed,and based on the reasonable connection method,the design parameters of the viscous damper are further opti-mized.The research results show that by increasing the longitudinal restraint stiffness,the internal force and deforma-tion of the main tower can be effectively reduced,and the main span deflection can be reduced.In order to reduce the vibration amplitude of the main beam during the operation of the bridge,fixed bearings should be preferred for the con-nection between the middle tower and the main beam.Installing viscous dampers at the main beam and the lower beam of the side tower can further reduce the seismic response of the substructure of the lower beam of the main tower.It is recommended that the damping coefficient of the damper be 3500 and the velocity index be 0.3.
万方数据
维普
