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Open AccessArticle

Development of Self-Sensing Textile Strengthening System Based on High-Strength Carbon Fiber

Department of Structural Engineering, Silesian University of Technology, ul. Akademicka 5, 44-100 Gliwice, Poland
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Materials 2018, 11(10), 2062; https://doi.org/10.3390/ma11102062
Received: 26 September 2018 / Revised: 19 October 2018 / Accepted: 20 October 2018 / Published: 22 October 2018
(This article belongs to the Special Issue Recent Advances in Smart Materials for the Built Environment)
The monitoring of structures is one of the most difficult challenges of engineering in the 21st century. As a result of changes in conditions of use, as well as design errors, many building structures require strengthening. This article presents research on the development of an externally strengthening carbon-fiber textile with a self-sensing option, which is an idea is based on the pattern of resistive strain gauges, where thread is presented in the form of zig-zagging parallel lines. The first laboratory tests showed the system’s high efficiency in the measurement of strains, but also revealed its sensitivity to environmental conditions. This article also presents studies on the influence of temperature and humidity on the measurement, and to separate the two effects, resistance changes were tested on unloaded concrete and wooden samples. The models were then placed in a climatic chamber, and the daily cycle of temperature and humidity changes was simulated. The research results confirmed preliminary observations of resistivity growths along with temperature. This effect is more visible on concrete samples, presumably due to its greater amount of natural humidity. The strain measurement with carbon fibers is very sensitive to temperature changes, and applications of this method in practice require compensation. View Full-Text
Keywords: CFRP strengthening; textile sensor; strain gauge errors compensation CFRP strengthening; textile sensor; strain gauge errors compensation
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Górski, M.; Krzywoń, R.; Borodeńko, M. Development of Self-Sensing Textile Strengthening System Based on High-Strength Carbon Fiber. Materials 2018, 11, 2062.

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