PROBLEM TO BE SOLVED: To provide a bridge dynamic response evaluation method capable of evaluating a dynamic response/evaluating soundness of a bridge, by determining an impact coefficient of the bridge, without executing deflection measurement work, by using an index based on a vertical acceleration response of a vehicle, by paying attention to a vehicle acceleration response of a train for traveling on the bridge.SOLUTION: An accelerometer for measuring vertical acceleration is respectively provided in the forefront vehicle and the rearmost vehicle of a train, and the vertical acceleration of the forefront vehicle and the rearmost vehicle in traveling is measured. Measurement data of the accelerometer when passing through a bridge is extracted, and an acceleration amplification factor is calculated by dividing a feature quantity of a waveform of the vertical acceleration measured by the accelerometer of the rearmost vehicle by a feature quantity of the vertical acceleration measured by the forefront vehicle. An impact coefficient of the bridge is calculated by applying an acceleration amplification coefficient to the relationship between the predetermined impact coefficient of the bridge and the acceleration amplification coefficient.SELECTED DRAWING: Figure 2
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