DOI QR코드

DOI QR Code

Evaluation of Heating and Buckling Effects on Inelastic Displacement Responses of Lead-Rubber Bearing Subject to Strong Ground Motions

강진 시 납-고무 면진장치의 비탄성 변위응답에 대한 온도상승 및 좌굴효과의 분석

  • Yun, Su-Jeong (Department of Civil Engineering, Kangwon National University) ;
  • Hong, Ji-Yeong (Department of Civil Engineering, Kangwon National University) ;
  • Moon, Jiho (Department of Civil Engineering, Kangwon National University) ;
  • Song, Jong-Keol (Department of Civil Engineering, Kangwon National University)
  • 윤수정 (강원대학교 건축.토목.환경공학부 토목공학과) ;
  • 홍지영 (강원대학교 건축.토목.환경공학부 토목공학과) ;
  • 문지호 (강원대학교 건축.토목.환경공학부 토목공학과) ;
  • 송종걸 (강원대학교 건축.토목.환경공학부 토목공학과)
  • Received : 2019.02.08
  • Accepted : 2019.10.02
  • Published : 2019.11.01

Abstract

The tendency to use a probabilistic design method rather than a deterministic design method for the design of nuclear power plants (NPPs) will increase because their safety should be considered and strictly controlled in relation to various causes of damage. The distance between a seismically isolated NPP structure and a moat wall is called the clearance to stop. The clearance to stop is obtained from the 90th percentile displacement response of a seismically isolated NPP subject to a beyond design basis earthquake (BDBE) in the probabilistic design method. The purpose of this study is to analyze the effects of heating and buckling effects on the 90th percentile displacement response of a lead-rubber bearing (LRB) subject to a BDBE. The analysis results show that considering the heating and buckling effects to estimate the clearance to stop is conservative in the evaluation of the 90th percentile displacement response. If these two effects are not taken into account in the calculation of the clearance to stop, the underestimation of the clearance to stop causes unexpected damage because of an increase in the collision probability between the moat wall and the seismically isolated NPP.

Keywords

References

  1. KEPIC-STC. Seismic Isolation System. Korea Electric Association. c2017.
  2. Kumar M, Whittaker AS, Constantinou MC. An advanced numerical model of elastomeric seismic isolation bearings. Earthquake Engineering and Structural Dynamics. 2014;43:1955-1974. https://doi.org/10.1002/eqe.2431
  3. Hancock J, Watson-Lamprey J, Abrahamson NA, Bommer JJ, Markatis A, McCoy E, Mendis R. An improved method of matching response spectra of recorded earthquake ground motion using wavelets. Journal of Earthquake Engineering. 2006;10(S1):67-89.
  4. Kim HJ, Song JK, Moon, JH. A probabilistic study on seismic response of seismically isolated nuclear power plant structures using lead rubber bearing. EESK J Earthquake Eng. 2018;22(2):45-54.
  5. 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.
  6. 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.
  7. Kalpakidis Y, Constantinou MC, Whittacker AS. Modeling strength degradation in lead-rubber bearing under earthquake shaking. Earthquake Engineering and Structural Dynamics. 2010;39:1533-1549. https://doi.org/10.1002/eqe.1039
  8. Kalpakidis Y, Constantinou MC. Effects of heating and load history on the behavior of lead-rubber bearings. Technical Report MCEER-08-0027. Multidisciplinary Center for Earthquake Engineering Research. University at Buffalo. State University of New York. Buffalo. NY. c2008.
  9. Constantinou MC, Whittacker AS, Kalpakidis Y, Fenz DM, Warn GP. Performance of seismic isolation hardware under service and seismic loading. Technical Report MCEER-07-0012. Multidisciplinary Center for Earthquake Engineering Research. University at Buffalo. State University of New York. Buffalo. NY. c2007.
  10. Yang KK, Song JK. Inelastic Response Evaluation of Lead-Rubber Bearing Considering Heating Effect of Lead Core. EESK J. Earthquake Eng. 2016;20(5):311-318.
  11. Timoshenko SP, Gere JM. Theory of Elastic Stability. McGraw-Hill. New York. c1961.