VERTICAL RESONANCE PHENOMENON OF SIMPLY SUPPORTED GIRDER BRIDGES ON HIGH-SPEED RAILWAY

The vertical resonance phenomenon which may take place for many kinds of different simply supported girder bridges on high-speed railway is studied with a vehicle-bridge interaction system model. The train's critical velocities are obtained when the vertical resonant vibration occurs. The influence of different spans upon the peak value of the vertical resonant vibration of the bridges is investigated. The precautions against the vertical resonance phenomenon of the bridges are addressed.