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강우량 및 지형정보 데이터를 이용한 한국형 토사재해 유발 강우량 산정 알고리즘 개발
최정렬(Jung-Ryel Choi),안성욱(Sung-Wook An),추경수(Kyung-Su Choo),김두희(Doo-Hye Kim),임형규(Hyoung-Kyu Lim),김병식(Byung-sik Kim) 한국방재학회 2022 한국방재학회논문집 Vol.22 No.6
기후변화에 의해 지속시간별 강우강도가 증가하였으며, 토사재해 발생 비율이 높아짐에 따라 인명 및 재산 피해가 빈번하게 발생하고 있다. 이는 한국에서 사회적 이슈가 되고 있으며, 토사재해를 발생시키는 한계강우량 관련 연구의 중요성이 높아지고 있다. 이에 본 논문에서는 한국 지역의 토사재해 유발 강우 기준 도출을 위하여 토사재해 유발 강우 임계값 자동 계산 알고리즘을 개발하였다. 이를 위해 강원도 지역의 토사재해 발생 이력을 수집하였으며, 토사재해 발생지점 인근의 기상대를 선정하여 강우량을 수집하였다. 토사재해 유발 강우 임계치 자동 계산 알고리즘은 R program 기반으로 작성되었다. 개발된 알고리즘을 이용하여 강원 지역에 적용한 결과 개별 토사재해 발생 지점 정보를 바탕으로 자동적으로 영향 기상대를 선정하였으며, 개별 토사재해 발생 지점 정보와 기상대 강우량 정보를 이용하여 유발강우량을 도출하고, 이를 통합하여 강원도 지역의 강우강도와 지속시간 간의 관계식을 자동으로 도출하였다. Climate change has increased the amount and intensity of rainfall, increasing debris flow risk. Debris flow damage has become a social issue in Korea, and the need for research related to rainfall thresholds for debris flow has increased. In this study, an automatic calculation algorithm was developed to derive criteria suitable for the Korean region for the rainfall thresholds of debris flow. The study area selected was Gangwon-do, where a significant amount of debris flow occurred recently, and information on rainfall and the occurrence of debris flow were collected. As a result of applying an algorithm based on the R programming language, an equation for the relationship between the rainfall intensity and duration in Gangwon-do was automatically derived using debris flow occurrence point information and meteorological rainfall information.
LHS-기반 신뢰성해석 기법을 이용한 안벽의 확률론적 구조안전성평가
정홍우(Hong-Woo Jung),허정원(Jungwon Huh),안성욱(Sung-Wook An),이정희(Jung-Hee Lee) 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
An efficient and practical reliability evaluation method is proposed for a caisson-type quay wall in this paper. It is capable of evaluating reliability of real complicated coastal structures considering uncertainties in various sources of design parameters, such as wave and current loads, resistance-related design variables including Young"s modulus and compressive strength of a reinforced concrete, soil parameters, and boundary conditions. It is developed by intelligently integrating the Latin hypercube sampling(LHS) method and the finite element method (FEM). The LHS is used to significantly reduce the computational effect by limiting the number of simulation cycles required for the reliability evaluation. The applicability and efficiency of the proposed method were verified using a caisson-type quay wall. in the numerical example.
LHS-기반 신뢰성해석 기법을 이용한 안벽의 확률론적 구조안전성평가
정홍우(Hong-Woo Jung),허정원(Jungwon Huh),안성욱(Sung-Wook An),이정희(Jung-Hee Lee) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
An efficient and practical reliability evaluation method is proposed for a caisson-type quay wall in this paper. It is capable of evaluating reliability of real complicated coastal structures considering uncertainties in various sources of design parameters, such as wave and current loads, resistance-related design variables including Young's modulus and compressive strength of a reinforced concrete, soil parameters, and boundary conditions. It is developed by intelligently integrating the Latin hypercube sampling (LHS) method and the finite element method (FEM). The LHS is used to significantly reduce the computational effort by limiting the number of simulation cycles required for the reliability evaluation. The applicability and efficiency of the proposed method were verified using a caisson-type quay wall. in the numerical example
응답면기법을 적용한 플로팅건축용 함체 구조물의 동요 신뢰성평가
서영훈(Yeong-Hun Seo),허정원(Jungwon Huh),안성욱(Sung-wook An) 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
A practical and efficient rediability analysis method for the quantitative estimation of probabilistic risk of a floating hull structure. It first uses the response surface method to develop a second order polynomial expressed in terms of input random variables for the implicit limit state function of algorithmic form such as the firite dlement method routinely used in everyday design practice. Then, the first order reliability method is applied to conduct very efficient and accurate reliability analysis, leading quantitative risk evaluation of the structure. Random variables and their statistical properties in the reliability analysis are selected based on the various literatures and an initial analysis. It is expected to be effectively applied in the reliability-based design and reliability analysis of read structures such as floating structures.
응답면기법을 적용한 플로팅건축용 함체 구조물의 동요 신뢰성평가
서영훈(Yeong-Hun Seo),허정원(Jungwon Huh),안성욱(Sung-wook An) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
A practical and efficient reliability analysis method for the quantitative estimation of probabilistic risk of a floating hull structure. It first uses the response surface method to develop a second order polynomial expressed in terms of input random variables for the implicit limit state function of algorithmic form such as the finite element method routinely used in everyday design practice. Then, the first order reliability method is applied to conduct very efficient and accurate reliability analysis, leading quantitative risk evaluation of the structure. Random variables and their statistical properties in the reliability analysis are selected based on the various literatures and an initial analysis. It is expected to be effectively applied in the reliability-based design and reliability analysis of real structures such as floating structures.