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Estimation of vehicle-induced bridge dynamic responses using fiber Bragg grating strain gages
Feng Xiao1, Dejian Meng2, Yang Yu1
1Department of Civil Engineering, Nanjing University of Science and Technology, Nanjing, China.
Abstract:
Strain gage sensors have been used to evaluate the local behavior of structures; however, there are limited studies for its application in bridge dynamic feature identification. In this study, fiber Bragg grating strain gages were installed on the lower chord members of a bridge, and dynamic features were identified successfully using strain gage readings when vehicles passed over the bridge. The results were also verified using a finite element model. The innovation presented in this article is the use of fiber Bragg grating strain gage readings to identify the dynamic features of a long-span, steel-girder bridge. To clarify the effect of truck dynamic load, the load spectrum of the truck is characterized. This article introduces a new method for identifying the dynamic parameters of bridges.
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