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Vulnerability Curve Assessment of Low/Mid-Rise Buildings Subjected to Debris-Flow Hazards

저·중층 건축물에 대한 토석류 취약도 평가

  • 최승훈 (강원대학교 산업기술연구소) ;
  • 함희정 (강원대학교 건축.토목.환경공학부) ;
  • 이승수 (충북대학교 토목공학부)
  • Received : 2021.08.31
  • Accepted : 2021.11.08
  • Published : 2021.11.30

Abstract

In this study, a methodology is developed to evaluate vulnerability (mean damage probability) curves of debris-flow for low/mid-rise buildings based on the fragility (exceedance damage probability) curves and mean damage ratio (MDR). In order to evaluate fragility curves, First Order Second Moment (FOSM) method is applied in this study. In the FOSM method, the maximum horizontal displacement of the building caused by the static and dynamic loadings of debris-flow is estimated as the effect of the external force, and the median/log-standard deviation values of spectral displacement of earthquake fragility of buildings developed by National Emergency Management Agency (NEMA) are used as the resistance statistics. MDR of the building subjected to the load of debris-flow is established based on literatures of the post investigations of debris-flow and landslide disasters, and is applied to convert the fragility curve to vunerability curve. 32 different types of vulnerability curves for buildings are databased as the variables of log-normal cumulative distribution function (CDF) after calibration and correction with the available post-disaster data sets. The vulnerability curves developed in this study may be used for risk and loss assessment of buildings subjected to debris-flow hazards. The developed methodology can be also applied if information of the fragility is available and the vulnerability has to be estimated from the fragility.

Keywords

Acknowledgement

본 연구는 행정안전부 극한 재난대응 기반기술개발사업의 연구비 지원(2018-MOIS31-009)에 의해 수행되었음. 또한, 이 논문는 2021년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(NRF-2021R1A6A3A01086618).

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