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Proceedings Paper

Characterization of long-gauge fiber optic sensors for structural identification
Author(s): Suzhen Li; Zhishen Wu
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Paper Abstract

To monitor structural behavior of large-scale civil infrastructures such as long-span bridges, it requires direct and accurate measurement of "macroscopic" strains which are more representative of the deformation of entire structural element. On the other hand, quasi-distributed measurements are also supposed to serve the purpose to catch the characters of whole structure. In this regard, a novel packaging method for practical adaptation of long-gage FBG strain sensor in civil structures is proposed. After a series of tests including uniaxial tension and compression, bending, free-vibration and shaking table tests, the ability of the packaged FBG sensors fixed on different specimen for macro-strain measurements has been characterized by comparing with conventional foil strain gauges in both static and dynamic cases. Combined with the parametric identification method based on macro-stains, the applicability of quasi-distributed long-gage FBG sensors in structural parameter estimation and damage detection is discussed.

Paper Details

Date Published: 17 May 2005
PDF: 12 pages
Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); doi: 10.1117/12.606367
Show Author Affiliations
Suzhen Li, Ibaraki Univ. (Japan)
Zhishen Wu, Ibaraki Univ. (Japan)


Published in SPIE Proceedings Vol. 5765:
Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
Masayoshi Tomizuka, Editor(s)

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