방어구조물 형상에 따른 토석류의 유입특성과 위험도 평가Inflow Characteristics of Debris flow and Risk Assessment for Different Shapes of Defensive Structure
- Other Titles
- Inflow Characteristics of Debris flow and Risk Assessment for Different Shapes of Defensive Structure
- Authors
- 오승명; 송창근; 이승오
- Issue Date
- 2016
- Publisher
- 한국안전학회
- Keywords
- debris flow disaster; risk assessment; shape of defensive structure; FII; FHR
- Citation
- 한국안전학회지, v.31, no.6, pp.93 - 98
- Journal Title
- 한국안전학회지
- Volume
- 31
- Number
- 6
- Start Page
- 93
- End Page
- 98
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/8280
- ISSN
- 1738-3803
- Abstract
- 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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Collections - College of Engineering > Department of Civil Engineering > 1. Journal Articles
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