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Geomechanics and Engineering
  Volume 21, Number 2, April25 2020, pages 143-152
DOI: http://dx.doi.org/10.12989/gae.2020.21.2.143
 


Earthquake risk assessment of underground railway station by fragility analysis based on numerical simulation
Sun Yong Kwon, Mintaek Yoo and Seongwon Hong

 
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.
 
Key Words
    earthquake risk assessment; underground structure; railway station; damage index; numerical analysis
 
Address
Sun Yong Kwon: Division of Resources and Energy Assessment, Korea Environment Institute,370 Sicheong-daero, Sejong-si, Republic of Korea

Mintaek Yoo: Railroad Structure Research Team, Korea Railroad Research Institute, Euiwang,360-1 in Wolam-dong, Uiwang-si, Gyeonggi-do, Republic of Korea

Seongwon Hong: Department of Safety Engineering, Korea National University of Transportation,50 Daehak-ro, Chungju-si, ChungBuk 27469, Republic of Korea

 

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