17 May 2005 Distributed coaxial cable crack sensors for crack mapping in RC
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Abstract
New type of distributed coaxial cable sensors for health monitoring of large-scale civil infrastructure was recently proposed and developed by the authors. This paper shows the results and performance of such sensors mounted on near surface of two flexural beams and a large scale reinforced concrete box girder that was subjected to twenty cycles of combined shear and torsion. The main objectives of this health monitoring study was to correlate the sensor's response to strain in the member, and show that magnitude of the signal's reflection coefficient is related to increases in applied load, repeated cycles, cracking, crack mapping, and yielding. The effect of multiple adjacent cracks, and signal loss was also investigated.
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Gary G. Greene, Abdeldjelil Belarbi, Genda Chen, Ryan McDaniel, "Distributed coaxial cable crack sensors for crack mapping in RC", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); doi: 10.1117/12.600143; https://doi.org/10.1117/12.600143
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KEYWORDS
Sensors

Signal attenuation

Actuators

Reflection

Dielectrics

Chromium

Sensor performance

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