Study on Damp in Impact Coefficient of Continuous Girder of Bridge

Based on simple vehicle model and simple continuous girder bridge model the vehicle-bridge interaction model is make.Under moving vehicle loads the histories of bending moment at different sections and mode curves of continuous girder bridge are given.The investigations show that the main mode are different for different section of continuous girder bridge fordifferent Therefore,according to the modes the moment impact and distance aimpact at different sections with damping radio are analysed,which reveals that the value of impact is releated with the position with the position of section for continuous girder bridge.