Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
권호 표지
DOI QR코드

DOI QR Code

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

고진동수 지진에 대한 기기 정착부의 비탄성 거동을 고려한 지진취약도 평가

  • 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)
  • 임승현 (경북대학교 융복합시스템공학과 플랜트시스템전공) ;
  • 곽신영 (한밭대학교 건설환경공학과) ;
  • 최인길 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 정재욱 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 김석철 (한국수력원자력 중앙연구원)
  • Received : 2021.06.29
  • Accepted : 2021.09.29
  • Published : 2021.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

Acknowledgement

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

References

  1. Eem S, Yang B, Jeon H. Earthquake Damage Assessment of Buildings Using Opendata in the Pohang and the Gyeongju Earthquakes. Journal of the Earthquake Engineering Society of Korea. 2018; 22(3):121-128. https://doi.org/10.5000/EESK.2018.22.3.121
  2. Korea Meteorological Administration. Earthquake Notification - 2016. 9.12 20:37. Official Notice. c2016.
  3. Central Disaster Safety Measures Headquarters. Press Releases: Recovery cost of Pohang Earthquake. c2017 Dec 6.
  4. Eem S, Choi IK. Shape of the Response Spectrum for Evaluation of the Ultimate Seismic Capacity of Structures and Equipment including High-frequency Earthquake Characteristics. Journal of the Earthquake Engineering Society of Korea. 2020;24(1): 1-8. https://doi.org/10.5000/EESK.2020.24.1.001
  5. Eem S, Choi IK. Seismic Response Analysis of Nuclear Power Plant Structures and Equipment due to the Pohang Earthquake. Journal of the Earthquake Engineering Society of Korea. 2018;22(3):113-119. https://doi.org/10.5000/EESK.2018.22.3.113
  6. US Nuclear Regulatory Commission. Regulatory Guide 1.60: Design Response Spectra for Seismic Design of Nuclear Power Plants. c2014.
  7. Kassawara B, Richards J. High Frequency Seismic Inelastic Effects on Equipment Anchorage. EPRI 3002010665. c2017.
  8. Reed JW, Kennedy RP. Methodology for Developing Seismic Fragilities, EPRI TR-103959. c1994.