Microdeformation measurement of concrete roadway slabs using fiber Bragg gratings

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Francisco Javier Vélez Hoyos
Claudia Milena Serpa Imbet
Nelson Darío Gómez Cardona


fiber optic sensors, optical fiber Bragg gratings, concrete roadway slabs, finite element method


This work shows a non–invasive method for micro–deformation measurements of concrete structures using Bragg grating sensors in optical fibers adhered to the surface. Measurements on roadway slabs under a 10 kN static load are made, finding an approximated ratio of 2 : 1 between the deformation registered by the sensors and the values from a computational simulation with the finite element method. We propose the use of these sensors for slab structural monitoring in a road network employing distributed and wavelength multiplexed sensors. This is a first report in Colombia of roadway slabs microdeformation measurement using fiber optic sensors.

PACS: 42.81.-i, 47.11.Fg, 42.79.Dj

MSC: 76M10


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