홍수 시 콘크리트 중력식댐의 위험도 분석을 위한 파괴확률 산정

• Published in: 한국안전학회지 Vol. 31; no. 6; pp. 58 - 66
• Main Authors: 조수진, Soo Jin Cho, 신성우, Sung Woo Shin, 심성한, Sung Han Sim, 임정열, Jeong Yeul Lim
• Format: Journal Article
• Language: Korean
• Published: 한국안전학회 31.12.2016
• Subjects: concrete gravity dam; failure probability analysis; flood; risk analysis; 안전공학; failure probability analysis; flood; concrete gravity dam; risk analysis
• ISSN: 1738-3803; 2383-9953

This study aims to estimate the failure probability of concrete gravity dams for their risk analysis under flood situation. To the end, failure modes of concrete gravity dams and their limit state functions are proposed based on numerous review of domestic and international literatures on the dam failure cases and design standards. Three failure modes are proposed: overturning, sliding, and overstress. Based on the failure modes the limit state functions, the failure probability is assessed for a weir section and a non-weir section of a dam in Korea. As water level is rising from operational condition to extreme flood condition, the failure probability is found to be raised up to the warning condition, especially for overturning mode at the non-weir section. The result can be used to reduce the risk of the dam by random environmental variables under possible flood situation.