Fiber optic corrosion sensing for bridges and roadway surfaces

Peter L. Fuhr; Timothy P. Ambrose; Dryver R. Huston; Adam P. McPadden

doi:10.1117/12.207716

20 April 1995 Fiber optic corrosion sensing for bridges and roadway surfaces

Peter L. Fuhr, Timothy P. Ambrose, Dryver R. Huston, Adam P. McPadden

Proceedings Volume 2446, Smart Structures and Materials 1995: Smart Systems for Bridges, Structures, and Highways; (1995) https://doi.org/10.1117/12.207716
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

In this paper we report the development of a fiber optic corrosion sensing system that complements and/or surpasses the capabilities of conventional corrosion sensing techniques. The sensing system is based on evanescent wave phenomena and in the configured sensor allows for the detection of general corrosion on and within materials. Based on the authors' experience installing may kilometers of fiberoptic sensors into large civil structures such as multistory buildings, hydroelectric dams, and railway/roadway bridges, we are (currently) embedding these sensors into bridge test members -- limited structures that are being subjected to accelerated corrosion testing conditions. Three Vermont Agency of Transportation bridges, one in a low salt use region, one in a medium salt use region, and the third in a high salt use region, are being selected and will be instrumented with these embedded fiber optic corrosion sensors. Monitoring of chloride penetration and rebar corrosion status will be measured during the course of a longitudinal study. The specific sensing mechanism and design for robustness (to allow survival of the embedding process during repaving of the bridges) are discussed and laboratory and initial field results are presented.

Citation Download Citation

Peter L. Fuhr, Timothy P. Ambrose, Dryver R. Huston, and Adam P. McPadden "Fiber optic corrosion sensing for bridges and roadway surfaces", Proc. SPIE 2446, Smart Structures and Materials 1995: Smart Systems for Bridges, Structures, and Highways, (20 April 1995); https://doi.org/10.1117/12.207716

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