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Open AccessArticle

Monitoring Bridge Dynamic Responses Using Fiber Bragg Grating Tiltmeters

1
Department of Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
2
College of Information Technology and Engineering, Marshall University, Huntington, WV 25755, USA
*
Author to whom correspondence should be addressed.
Sensors 2017, 17(10), 2390; https://doi.org/10.3390/s17102390
Received: 24 September 2017 / Revised: 15 October 2017 / Accepted: 18 October 2017 / Published: 20 October 2017
(This article belongs to the Special Issue Sensors and Sensor Networks for Structural Health Monitoring)
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. View Full-Text
Keywords: fiber Bragg grating (FBG) tiltmeter; vibration monitoring; bridge health monitoring; dynamic identification; expansion bearing fiber Bragg grating (FBG) tiltmeter; vibration monitoring; bridge health monitoring; dynamic identification; expansion bearing
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MDPI and ACS Style

Xiao, F.; Chen, G.S.; Hulsey, J.L. Monitoring Bridge Dynamic Responses Using Fiber Bragg Grating Tiltmeters. Sensors 2017, 17, 2390.

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