Ground Vibration Measures for the Rocking Vibration of the Piers with Two-Box Girders Bridge

Vibration caused by running vehicles on a highway bridge is spread to the superstructure, substructure s and ground. The ground vibrates both in horizontal and vertical direction. When vehicles load at the tip of the cross beam in the T -shape d pier , rocking vibration of the pier occurs. Its ground vibration in transverse direction is the biggest. In the two -box gi rders bridge, which bearings are installed at the tip of the cross beam of the T -shape d pier , the ground vibration has greatly occurred due to the rocking vibration of the pier. Two measures to mitigate the vibration are propose d in t his study. The evaluat ion the change of the vibration characteristics and effects of the measures to mitigate the vibration are also discussed in the study .