한국안전학회지 (Journal of the Korean Society of Safety)

  • 제31권6호
  • /
  • Pages.93-98
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  • 2016
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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방어구조물 형상에 따른 토석류의 유입특성과 위험도 평가

Inflow Characteristics of Debris Flow and Risk Assessment for Different Shapes of Defensive Structure

  • Oh, Seung Myeong (Department of Safety Engineering, Incheon National University) ;
  • Song, Chang Geun (Department of Safety Engineering, Incheon National University) ;
  • Lee, Seung Oh (School of Urban and Civil Engineering, Hongik University)
  • 투고 : 2016.03.14
  • 심사 : 2016.12.02
  • 발행 : 2016.12.31
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초록

This study analyzed the inflow characteristics of debris flow according to shape of defensive structure and computed risk index. In order to simulate debris flow, two shapes of defensive structure were considered. Initial mass distribution was set with a rectangular shape and defensive structures were set semi-circular shape and rectangular shape, respectively. It was found that a defensive structure with semicircular shape was more vulnerable to debris impact compared with rectangular shape because the flow mass became concentrated in quadrant part of the inner circle. If the velocity of the debris flow was less than 1 m/s, the risk assessment by FII (Flood Intensity Index) was much appropriate. However, when the movement of debris runout was faster than 1 m/s, the risk index of FHR (Flood Hazard Rating) provided improved classification due to its subdivided hazardous range.

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참고문헌

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