Characterization of long-gauge fiber optic sensors for structural identification

Suzhen Li; Zhishen Wu

doi:10.1117/12.606367

17 May 2005 Characterization of long-gauge fiber optic sensors for structural identification

Suzhen Li, Zhishen Wu

Proceedings Volume 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2005) https://doi.org/10.1117/12.606367
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

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.

Citation Download Citation

Suzhen Li and Zhishen Wu "Characterization of long-gauge fiber optic sensors for structural identification", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); https://doi.org/10.1117/12.606367

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