Oscillator Experiment of Simple Girder Bridge coupled with Vehicle

This study presents experimental investigations on dynamic characteristics of bridges coupled with vehicles in order to clarify the vehicle-bridge interaction under earthquakes. Oscillator experiment is carried out at a one-box girder bridge coupled with a vehicle. Both acceleration responses of the bridge and those of the vehicle are measured in horizontal and vertical directions. The dynamic responses of the bridge loaded with the vehicle are compared with those responses of the bridge without the vehicle, and the effect of vehicle loading on the seismic response of bridge is discussed. Observations demonstrate that the presence of the vehicle may affect the dynamic characteristic of bridges.