Monitoring Bridge Dynamic Responses Using Fiber Bragg Grating Tiltmeters

Sensors

Gang S. Chen¹  J. Leroy Hulsey²  Feng Xiao² 

[1] College of Information Technology and Engineering, Marshall University, Huntington, WV 25755, USA;Department of Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA;

关键词: fiber Bragg grating (FBG) tiltmeter;    vibration monitoring;    bridge health monitoring;    dynamic identification;    expansion bearing;   

DOI  :  10.3390/s17102390

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown