Resonant Bridge Detection Method by On-board Measurement

Abstract

Large vibrations due to resonance is a major issue for high-speed railway bridges. In order to efficiently and frequently inspect bridge resonance, this study proposes a detection index, amplification factor, based on the vertical acceleration of the head and tail vehicles of a passing train. Field tests with actual trains and bridges revealed that the amplification factor tends to increase with bridge resonance and the impact factor. In addition, train-bridge dynamic interaction simulation clarified that the correlation of the amplification factor with the impact factor was over 0.9. It also revealed that the amplification factor of a train with short vehicles could be used to detect the potential resonance of bridges.