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http://dx.doi.org/10.7734/COSEIK.2014.27.5.385

Seismic Responses of Seismically-Isolated Nuclear Power Plants considering Aging of High Damping Rubber Bearing in Different Temperature Environments  

Park, Junhee (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute)
Choun, Young-Sun (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute)
Choi, In-Kil (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.27, no.5, 2014 , pp. 385-392 More about this Journal
Abstract
The isolators have been generally used to reduce a seismic force. If the isolators apply to the nuclear power plants(NPPs), the durability and capacity for the structures and equipments should be ensured during the life time. In this study, the long-term behavior of isolated NPPs was analyzed for ensuring the seismic safety. The properties of isolator due to the age-related degradation were analyzed. And the seismic behavior of isolated buildings was analyzed by considering the aging of rubber bearings in different temperature environments. According to the analysis results, the natural frequency of structures was increased with time. But the maximum acceleration and maximum displacement of isolated structures have not changed significantly. Although the damaged of structure did not occurred by aging of isolators, it was presented that the spectral acceleration at the target frequency of isolated structure increased with the temperature. Therefore the isolators in the isolated buildings should be carefully designed and manufactured considering the temperature-dependancy of rubber material.
Keywords
high damping rubber bearing; aging; temperature; seismic response;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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