期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 29, 期 20, 页码 3890-3901出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X18799493
关键词
Magnetorheological elastomer; adaptive bridge bearing isolator; vibration control; magnetorheological effect
资金
- Federal Highway Administration [DTFH61-13-C-00020]
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.
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