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http://dx.doi.org/10.12652/Ksce.2010.30.5A.417

Effects of Accelerated Thermal Aging on Dynamic Properties of Laminated Rubber Bearings  

Oh, Ju (서울시립대학교 토목공학과)
Jung, Hie-Young (서울시립대학교 토목공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.5A, 2010 , pp. 417-424 More about this Journal
Abstract
The dynamic properties of laminated rubber bearings used as isolators in structures could be significantly deteriorated because of the change of microstructure in rubber caused by thermal aging. As a result, a catastrophic failure of bridges and buildings unexpectedly occurs when they are subjected to earthquake attack. Here, the dynamic properties of laminated rubber bearings before and after different of compression-shear loading and repeated cycles loadings, ultimated failure test with thermal aging were first measured and compared to each other. The experimental results, the effects of thermal aging on the shear stiffness, energy absorption, and equivalent damping coefficient of laminated rubber bearings are investigated. It is found that the deterioration of dynamic properties of laminated rubber bearings caused by thermal aging is significant and should be taken into account in designing rubber bearings.
Keywords
laminated rubber bearing; isolator; thermal aging; dynamic properties;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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