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Prediction of Long Term Performance and Creep of Laminated Natural Rubber Bearings(NRB)

적층 천연고무 면진장치의 장기성능과 크리프에 대한 예측

  • Received : 2012.12.12
  • Accepted : 2013.03.11
  • Published : 2013.05.02

Abstract

Seismic isolation has been considered and utilized in various industries as a way to prevent huge damage on to structures by large earthquakes in various industries. The laminated Laminated rubber bearings is are most frequently used in seismic isolation systems. The structural Structural safety could not be assured unless the performance of the rubber bearing is not guaranteed for the life time of the structure under the consideration that the bearing is a critical structural member to sustain vertical loads in the seismically isolated structure. However, there are few studies on the deterioration problems of rubber bearings during their service life. The long term performance of the rubber bearings was not considered in past designs of seismically isolated structures. This study evaluates the long term performance and creep characteristics of laminated natural rubber bearings that are used in seismically isolated buildings. For the this study, a set of accelerated thermal aging tests and creep tests are were performed on real specimens. The experimental results show that the natural rubber bearings would have a stable change rate of change for durability under severe environmental conditions for a long time.

Keywords

Laminated natural rubber bearing;seismic isolation system;accelerated aging;long term performance;creep

Acknowledgement

Supported by : 한국에너지기술 평가원

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Cited by

  1. Seismic Responses of Seismically-Isolated Nuclear Power Plants considering Aging of High Damping Rubber Bearing in Different Temperature Environments vol.27, pp.5, 2014, https://doi.org/10.7734/COSEIK.2014.27.5.385