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11 April 2017 A large-scale adaptive magnetorheological elastomer-based bridge bearing
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This study presents the design, development, testing, and performance evaluation of a scaled bridge bearing utilizing magnetorheological elastomer (MRE) layers as adaptive elements, which allow for a varying stiffness under a magnetic field. The adaptive bridge bearing system incorporates a closed-loop magnetic circuit that results in an enhanced magnetic field in the MRE layers. A new design is introduced and optimized using structural and magnetic finite element analyses. Two bearings and a test setup for applying simultaneous variable shear, constant compression, and a variable magnetic field on the bearing are fabricated. The adaptive bridge bearing results demonstrate the stiffness change of the bearing under different strain levels and loading frequencies, as well as the ability of the bearing to change its stiffness under different applied electric currents, which can be correlated to the applied magnetic field.
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Siddaiah Yarra, Majid Behrooz, Gokhan Pekcan, Ahmad Itani, and Faramarz Gordaninejad "A large-scale adaptive magnetorheological elastomer-based bridge bearing", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016425 (11 April 2017);

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