Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Combination Procedure for Seismic Correlation Coefficient in Fragility Curves of Multiple Components

다중기기 취약도곡선의 지진상관계수 조합 절차

  • Kim, Jung Han (Department of Civil Engineering, Pusan National University) ;
  • Kim, Si Young (Department of Civil Engineering, Pusan National University) ;
  • Choi, In-Kil (Structural Safety & Prognosis Research Division, Korea Atomic Energy Research Institute)
  • 김정한 (부산대학교 토목공학과) ;
  • 김시영 (부산대학교 토목공학과) ;
  • 최인길 (한국원자력연구원 기기구조예측진단연구부)
  • Received : 2020.03.16
  • Accepted : 2020.04.13
  • Published : 2020.05.01
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Abstract

For the important safety system, two or more units of identical equipment or redundant components with similar function were installed to prevent abnormal failure. If the failure probability of such equipment is independent, this redundancy could increase the system safety remarkably. However, if the failure of each component is highly correlated by installing in a structure or experiencing an earthquake event, the expected redundancy effect will decrease. Therefore, the seismic correlation of the equipment should be evaluated quantitatively for the seismic probabilistic safety assessment. The correlation effect can be explained in the procedure of constructing fragility curves. In this study, several methodologies to quantify the seismic correlation in the failure probability calculation for multiple components were reviewed and two possible ways considering the realistic situation were selected. Simple examples were tested to check the applicability of these methods. The conversion method between these two methods was suggested to render the evaluation using the advantages of each method possible.

Keywords

References

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