Identification of span of Multi-span Simply Supported Girders by the Longitudinal Level Waveforms

  • Bo Zhang Infrastructure Inspection Research Institute, China Academy of Railway Sciences Corporation Limited, 100081 Beijing, China
  • Xiubo Liu Infrastructure Inspection Research Institute, China Academy of Railway Sciences Corporation Limited, 100081 Beijing, China
  • Jing Lin
Keywords: Span identification, multi-span simply supported girders, longitudinal level waveform, time-frequency analysis

Abstract

In high-speed railways, the periodic component of longitudinal level on the top surface of the track can be observed for multi-span simply supported girders. To monitor this component, the paper proposes a method to determine the locating position of simply supported girders using longitudinal level waveforms. The method first applies time-frequency analysis to determine the locating position of simply supported girder bridges in the longitudinal level
waveform. Then it adopts a local minimum detection strategy to identify the locating position of the girders. The method is evaluated using the longitudinal level data of a 100km high-speed railway in China; the results show good locating performance.

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Published
2019-08-27
Section
Articles