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[2E11-15-03] Railway bridge deflection estimation method based on track irregularity measured on the vehicles
Keywords:On board measurement, Bridge, Deflection
The railway bridge deflection when a train passes is a typical index expressing the bridge performance. As an efficient estimation method, this study develops a method using track irregularity data measured on a traveling train. The method can estimate the maximum bridge deflection by multiplying the maximum difference between the track irregularities of the first and last vehicles by the conversion coefficient. The method is applied to the track irregularity data measured on actual railway, the estimated maximum deflections of two bridges agree well with the on-site bridge deflection measurement results within an error of 10 %.