Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Fragility Analysis of Seismically Isolated Nuclear Power Plant Structures using Equivalent Linear- and Bilinear-Lead Rubber Bearing Model

등가선형 및 이선형 납-고무받침 모델을 적용한 면진된 원전구조물의 지진 취약도 해석

  • Lee, Jin-Hi (Department of Civil Engineering, Kangwon National University) ;
  • Song, Jong-Keol (Department of Civil Engineering, Kangwon National University)
  • Received : 2015.01.26
  • Accepted : 2015.07.08
  • Published : 2015.09.07
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Abstract

In order to increase seismic performance of nuclear power plant (NPP) in strong seismic zone, lead-rubber bearing (LRB) can be applied to seismic isolation system of NPP structures. Simple equivalent linear model as structural analysis model of LRB is more widely used in initial design process of LRB than a bilinear model. Seismic responses for seismically isolated NPP containment structures subjected to earthquakes categorized into 5 different soil-site classes are calculated by both of the equivalent linear- and bilinear- LRB models and compared each others. It can be observed that the maximum displacements of LRB and shear forces of containment in the case of the equivalent linear LRB model are larger than those in the case of bilinear LRB model. From the seismic fragility curves of NPP containment structures isolated by LRB, it can be observed that seismic fragility in the case of equivalent linear LRB model are about 5~30 % larger than those in the case of bilinear LRB model.

Keywords

References

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Cited by

  1. Seismic Response Evaluation of Seismically Isolated Nuclear Power Plant Structure Subjected to Gyeong-Ju Earthquake vol.20, pp.7 Special, 2016, https://doi.org/10.5000/EESK.2016.20.7.453
  2. Seismic Fragility of Base-Isolated Nuclear Power Plant Considering Effects of Near-Fault Ground Motions vol.18, pp.7, 2018, https://doi.org/10.9798/KOSHAM.2018.18.7.315