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http://dx.doi.org/10.7843/kgs.2020.36.10.41

A Study on a Seismic Detection Technology for High-speed Railway Considering Site Response Characteristics  

Yoo, Mintaek (Railroad Structure Research Team, Korea Railroad Research Institute)
Moon, Jae Sang (Structural Dept., Yooshin Engrg. Corporation)
Park, Byoungsun (Construction Technology Research Center, Korea Conformity Laboratories)
Yoo, Byoung Soo (Dept. of Civil and Environmental Engrg., Seoul National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.10, 2020 , pp. 41-56 More about this Journal
Abstract
For the rapid and accurate warning, the system requires not only the sufficient number of seismometers but also the appropriate detection technique of sensor data. Instead of installing new seismometers, on-board accelerometers of the train could be utilized as alternatives. However, the data from on-board accelerometers includes train vibrations and the response of embankment site by earthquake, which are different from earthquakes measured from the seismometer. This study suggests signal analysis technique to detect earthquake from the on-board accelerometer data. The virtual on-board accelerometer data including the response of embankment site, obtained from site response analysis method, has been constructed. The constructed data has been analyzed using short time Fourier transform (STFT) and wavelet transform (WT). STFT method provides better performance to detect long-period earthquake whereas WT method is more available to detect short-period earthquake.
Keywords
Earthquake detection; High-speed railway; Short time fourier transform; Site response analysis; Wavelet transform;
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