Geomechanics and Engineering

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Earthquake risk assessment of underground railway station by fragility analysis based on numerical simulation

  • Kwon, Sun Yong (Division of Resources and Energy Assessment, Korea Environment Institute) ;
  • Yoo, Mintaek (Railroad Structure Research Team, Korea Railroad Research Institute) ;
  • Hong, Seongwon (Department of Safety Engineering, Korea National University of Transportation)
  • Received : 2019.12.11
  • Accepted : 2020.03.02
  • Published : 2020.04.25
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Abstract

Korean society experienced successive earthquakes exceeding 5.0 magnitude in the past three years resulting in an increasing concern about earthquake stability of urban infrastructures. This study focuses on the significant aspects of earthquake risk assessment for the cut-and-cover underground railway station based on two-dimensional dynamic numerical analysis. Presented are features from a case study performed for the railway station in Seoul, South Korea. The PLAXIS2D was employed for numerical simulation and input of the earthquake ground motion was chosen from Pohang earthquake records (M5.4). The paper shows key aspects of earthquake risk for soil-structure system varying important parameters including embedded depth, supported ground information, and applied seismicity level, and then draws several meaningful conclusions from the analysis results such as seismic risk assessment.

Keywords

Acknowledgement

Supported by : Korea Environment Institute, National Research Foundation of Korea(NRF)

This research was supported by a grant from the Review of Environmental Impact Assessment funded by Korea Environment Institute, the R&D Program (PK2002A4) of the Korea Railroad Research Institute, Republic of Korea, and the Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (No. 2018R1A4A1025953) and this was supported by Korea National University of Transportation in 2020.

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