Design and validation of similarity model in bridge structural vibration tests

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 220-226.

WANG Zhen-guo LEI Xiao-yan LUO Kun ZENG Shao-hui

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Abstract

The similarity model of a simply supported box-girder bridge with span of 32 m was designed and made with the scale of 1:10. Based on the similarity law of elastic force, the similarity relation between the original bridge and the model bridge was derived. Taking the vibration of bridge structure as the study objective, the applicability of the similarity relation between the original bridge and the model bridge was discussed through the finite element (FE) numerical analysis and test study. The results showed that all physical quantities' scales between the original bridge and the model bridge obtained using the FE numerical analysis are basically consistent with those gained using theoretical deduction; there are differences between the measured data and those of the FE numerical analysis for the model bridge, but as a whole, both of them are roughly consistent; the similarity relation derived based on the similarity law of elastic force is applicable between the original bridge and the model bridge, however, it is needed to further verify if this relation is applicable for complex bridge structures.

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WANG Zhen-guo LEI Xiao-yan LUO Kun ZENG Shao-hui. Design and validation of similarity model in bridge structural vibration tests[J]. Journal of Vibration and Shock, 2018, 37(7): 220-226

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