Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6898
PIRA download icon_1.1View/Download Full Text
Title: Using fiber Bragg grating (FBG) sensors for vertical displacement measurement of bridges
Authors: Yau, MH
Chan, THT
Thambiratnam, DP
Tam, HY 
Issue Date: Dec-2011
Source: Dynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 1, p. 288-297
Abstract: In many bridges, vertical displacements are one of the most relevant parameters for structural health monitoring in both the short and long terms. Bridge managers around the globe are always looking for a simple way to measure vertical displacements of bridges. However, it is difficult to carry out such measurements. On the other hand, in recent years, with the advancement of fiber-optic technologies, fiber Bragg grating (FBG) sensors are more commonly used in structural health monitoring due to their outstanding advantages including multiplexing capability, immunity of electromagnetic interference as well as high resolution and accuracy. For these reasons, using FBG sensors is proposed to develop a simple, inexpensive and practical method to measure vertical displacements of bridges. A curvature approach for vertical displacement measurement using curvature measurements is proposed. In addition, with the successful development of a FBG tilt sensors, an inclination approach is also proposed using inclination measurements. A series of simulation tests of a full-scale bridge was conducted. It shows that both the approaches can be implemented to determine vertical displacements for bridges with various support conditions, varying stiffness (El) along the spans and without any prior known loading. These approaches can thus measure vertical displacements for most of slab-on-girder and box-girder bridges. Moreover, with the advantages of FBG sensors, they can be implemented to monitor bridge behavior remotely and in real time. Further recommendations of these approaches for developments will also be discussed at the end of the paper.
Keywords: Vertical displacement
Structural health monitoring (SHM)
Bridge
Fiber Bragg grating (FGB) sensors
Publisher: Department of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.
ISBN: 978-962-367-731-8
Rights: Copyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic University
Posted with permission of the publisher.
Appears in Collections:Conference Paper

Files in This Item:
File Description SizeFormat 
Yau_Using_Fiber_Bragg.pdf1.65 MBAdobe PDFView/Open
Open Access Information
Status open access
File Version Version of Record
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

58
Last Week
0
Last month
Citations as of May 22, 2022

Downloads

108
Citations as of May 22, 2022

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.