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고진동수 지진에 대한 기기 정착부의 비탄성 거동을 고려한 지진취약도 평가

Seismic Fragility Analysis Considering the Inelastic Behavior of Equipment Anchorages for High-Frequency Earthquakes

  • 임승현 (경북대학교 융복합시스템공학과 플랜트시스템전공) ;
  • 곽신영 (한밭대학교 건설환경공학과) ;
  • 최인길 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 정재욱 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 김석철 (한국수력원자력 중앙연구원)
  • Eem, Seunghyun (Major in Plant System Engineering, Department of Convergence & Fusion System Engineering, Kyungpook National University) ;
  • Kwag, Shinyoung (Department of Civil & Environmental Engineering, Hanbat National University) ;
  • Choi, In-Kil (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute) ;
  • Jung, Jae-Wook (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute) ;
  • Kim, Seokchul (Central Research Institute, Korea Hydro & Nuclear Power)
  • 투고 : 2021.06.29
  • 심사 : 2021.09.29
  • 발행 : 2021.11.01

초록

Nuclear power plants in Korea were designed and evaluated based on the NRC's Regulatory Guide 1.60, a design response spectrum for nuclear power plants. However, it can be seen that the seismic motion characteristics are different when analyzing the Gyeongju earthquake and the Pohang earthquake that has recently occurred in Korea. Compared to the design response spectrum, seismic motion characteristics in Korea have a larger spectral acceleration in the high-frequency region. Therefore, in the case of equipment with a high natural frequency installed in a nuclear power plant, seismic performance may be reduced by reflecting the characteristics of domestic seismic motions. The failure modes of the equipment are typically structural failure and functional failure, with an anchorage failure being a representative type of structural failure. In this study, comparative analyses were performed to decide whether to consider the inelastic behavior of the anchorage or not. As a result, it was confirmed that the seismic performance of the anchorages could be increased by considering the inelastic behavior of an anchorage.

키워드

과제정보

본 연구는 2020년도 한국연구재단의 지원과 2017년도 산업통상자원부의 재원으로 한국에너지기술평가원의 지원을 받아 수행한 연구과제입니다(No. 2020R1G1A1007570 &No. 201715101019 10).

참고문헌

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