Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Evaluation of Seismic Fragility Curve of Seismically Isolated Nuclear Power Plant Structures for Artificial Synthetic Earthquakes Corresponding to Maximum-Minimum Spectrum

최대-최소 스펙트럼에 대응하는 인공합성지진에 대한 면진된 원전구조물의 지진취약도 곡선 평가

  • Kim, Hyeon-Jeong (Department of Civil Engineering, Kangwon National University) ;
  • Song, Jong-Keol (Department of Civil Engineering, Kangwon National University)
  • 김현정 (강원대학교 건축.토목.환경공학부 토목공학전공) ;
  • 송종걸 (강원대학교 건축.토목.환경공학부 토목공학전공)
  • Received : 2018.08.06
  • Accepted : 2018.12.27
  • Published : 2019.03.01
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Abstract

In order to increase the seismic safety of nuclear power plant (NPP) structures, a technique to reduce the seismic load transmitted to the NPP structure by using a seismic isolation device such as a lead-rubber bearing has recently been actively researched. In seismic design of NPP structures, three directional (two horizontal and one vertical directions) artificial synthetic earthquakes (G0 group) corresponding to the standard design spectrum are generally used. In this study, seismic analysis was performed by using three directional artificial synthetic earthquakes (M0 group) corresponding to the maximum-minimum spectrum reflecting uncertainty of incident direction of earthquake load. The design basis earthquake (DBE) and the beyond design basis earthquakes (BDBEs are equal to 150%, 167%, and 200% DBE) of G0 and M0 earthquake groups were respectively generated for 30 sets and used for the seismic analysis. The purpose of this study is to compare seismic responses and seismic fragility curves of seismically isolated NPP structures subjected to DBE and BDBE. From the seismic fragility curves, the probability of failure of the seismic isolation system when the peak ground acceleration (PGA) is 0.5 g is about 5% for the M0 earthquake group and about 3% for the G0 earthquake group.

Keywords

References

  1. Pacific Earthquake Engineering Research Center (PEER). PEER Ground Motion Database. Available from: https://peer.berkeley.edu/peer-strong-ground-motion-database.
  2. Mazzoni S, McKenna F, Scott MH, Fenves GL. OpenSees: Open System of Earthquake Engineering Simulation. Pacific Earthquake Engineering Center, Univ. of Calif., Berkeley. 2007. Available from: http://opensees.berkeley.edu.
  3. KEPIC-STC. Seismic isolation system. Korea Electric Association. c2017.
  4. Seok CG, Song JK. Seismic Performance Evaluation of Seismically Isolated Nuclear Power Plants Considering Various Velocity-Dependent Friction Coefficient of Friction Pendulum System. EESK J Earthquake Eng. 2016;20(2):125-134.
  5. Huang YN, Whittaker AS, Luco N. Maximum spectral demands in the near-fault region. Earthquake Spectra. 2008;24(1):319-341. https://doi.org/10.1193/1.2830435
  6. Huang YN, Whittaker AS, Kennedy RP, Mayes RL. Assessment of Base-Isolated Nuclear Structures for Design and Beyond-Design Basis Earthquake Shaking. Technical Report MCEER0-09-0008. c2009.
  7. Shinozuka M, Feng MQ, Kim HK, Ueda T. Statistical Analysis of Fragility Curves. Technical Report at Multidisciplinary Center for Earthquake Engineering Research., New York. c2002.
  8. Shinozuka M, Feng MQ, Lee JH. Statistical analysis of fragility curves. Journal of Engineering Mechanics. 2000;126(12):1224-1231. https://doi.org/10.1061/(ASCE)0733-9399(2000)126:12(1224)
  9. Zhang J, Huo Y. Optimum isolation design for highway bridges using fragility function method. Proceedings of the 14 WCEE; 2008 Oct 12-17; Beijing, China. c2008.
  10. Lee JH, Song JK. Seismic Fragility Analysis of Seismically Isolated Nuclear Power Plant Structures using Equivalent Linear- and Bilinear- Lead Rubber Bearing Model. Journal of the Earthquake Engineering Society of Korea. 2015;19(5):207-217. https://doi.org/10.5000/EESK.2015.19.5.207