Performance of a large-scale magnetorheological elastomer–based vibration isolator for highway bridges

Author:

Yarra Siddaiah1,Gordaninejad Faramarz2ORCID,Behrooz Majid2,Pekcan Gokhan1,Itani Ahmad M1,Publicover Nelson3

Affiliation:

1. Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV, USA

2. Department of Mechanical Engineering, University of Nevada, Reno, Reno, NV, USA

3. Department of Electrical and Biomedical Engineering, University of Nevada, Reno, Reno, NV, USA

Abstract

This study presents an experimental investigation on the magnetorheological effect of a new magnetorheological elastomer–based adaptive bridge isolation bearing system. Two identical magnetorheological elastomer–based adaptive bridge bearings (isolators) were designed and fabricated. Electromagnets were incorporated to create a closed-loop magnetic path in the magnetorheological elastomer layers. A double-lap shear and compression test setup was utilized to characterize the mechanical properties of the system subjected to scaled structural cyclic forces and strains. Experimental results demonstrated that the effective stiffness of adaptive bridge bearings increases with increased applied magnetic field and a compressive force resulted in larger apparent shear stiffness. Also, increasing loading frequency resulted in larger apparent shear stiffness and lower magnetorheological effect and similarly, however, a compressive force resulted in smaller magnetorheological effects.

Funder

Federal Highway Administration

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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