Journal
SENSORS
Volume 17, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/s17102390
Keywords
fiber Bragg grating (FBG) tiltmeter; vibration monitoring; bridge health monitoring; dynamic identification; expansion bearing
Funding
- Alaska University Transportation Center [510015]
- Alaska Department of Transportation and Public Facilities, University of Alaska Fairbanks
- Chandler Monitoring System Inc.
- Micron Optic, Inc.
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In bridge health monitoring, tiltmeters have been used for measuring rotation and curvature; however, their application in dynamic parameter identification has been lacking. This study installed fiber Bragg grating (FBG) tiltmeters on the bearings of a bridge and monitored the dynamic rotational angle. The dynamic features, including natural frequencies and mode shapes, have been identified successfully. The innovation presented in this paper is the first-time use of FBG tiltmeter readings to identify the natural frequencies of a long-span steel girder bridge. The identified results have been verified using a bridge finite element model. This paper introduces a new method for the dynamic monitoring of a bridge using FBG tiltmeters. Limitations and future research directions are also discussed in the conclusion.
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