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Title |
Shear Characteristics of Elastomeric Bearing Rubber Deteriorated by Accelerated Heat Aging(2): Chloroprene Rubber
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Authors |
선창호(Chang-Ho Sun) ; 김익현(Ick-Hyun Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.6.103 |
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Abstract |
Elastomeric bearings composed of flexible rubber materials and steel reinforcement plates are widely used for seismic retrofit of bridges due to their excellent vertical stiffness and flexible lateral stiffness. Especially, it has the advantages of simple construction and low cost. Chloroprene rubber, a type of rubber material, has greater resistance to aging than natural rubber, but its performance is also degraded due to various deterioration factors. Although these aging characteristics are not reflected in the seismic design standards and seismic performance evaluation guidelines, it is reasonable to reflect this when related studies are accumulated. For chloroprene rubber, accelerated heat aging test was performed with variables of heating temperatures and exposure time to analyze shear characteristics. As aging progresses the maximum shear stress and shear strain decrease. Also, the shear stiffness is greatly increased at the same shear strain.
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