A Study of Vulnerability of Structure by Debris Flow

Choi, Woo Il; Lee, Su Gon; Lee, Byok Kyu; Jang, Seung Jin

Journal of the Korean Society of Hazard Mitigation 2012;12(3):141-146.
Published online June 30, 2012.

토석류에 의한 구조물 취약성평가에 관한 연구

최우일, 이수곤, 이벽규, 장승진

A Study of Vulnerability of Structure by Debris Flow

Woo Il Choi, Su Gon Lee, Byok Kyu Lee, Seung Jin Jang

Abstract

The recent domestic research trend with regard to debris flows mainly focused on mapping of landslide hazard and its triggering mechanism. However, as the vulnerability of structure is very important as much as mapping of landslide hazard or its triggering mechanism, this paper is focused on vulnerability assessment of structures impacted by debris flow. The principles of dynamic response of structures to earthquake impact and damage functions proposed in HAZUS-MH were used as the assessment method for estimation of the structural vulnerability, and these methods were verified by applying it to two debris flow cases such as Umyeon-mountain landslide area and Chuncheon landslide area. As the result, it is considered that these methods are suitable for vulnerability assessment of structure impacted debris flows in Korea, but some cases are still limited with regard to practical applications due to the difference of the structure design codes and working behavior between Korea and America.

Key Words: Landslide; debris flow; HAZUS-MH; vulnerability; damage function

요지

이 논문에서는 토석류에 의한 구조물의 취약성을 평가방법을 제시하였다. 취약성을 평가하는 방법으로 지진에 따른 구조물의 동적응답이론과 HAZUS-MH에서 제시한 손상함수를 적용하였으며, 우면산 산사태 및 춘천 산사태에 통하여 국내에도 적용할 수 있는지를 검증하였다. 그 결과 위의 방법론은 국내의 토석류에 의한 구조물의 취약성평가에도 적용성이 높은 것으로 나타났으나, 한국과 미국의 구조물 설계기준 및 시공행태 등의 차이로 인하여 일부는 실제 적용성이 떨어지는 것으로 나타났다.

핵심용어: 산사태; 토석류; 취약성; 손상함수