Artículo
An Experimental Study on Static and Dynamic Strain Sensitivity of Embeddable Smart Concrete Sensors Doped with Carbon Nanotubes for SHM of Large Structures
Autor/es | Meoni, Andrea
D’Alessandro, Antonella Downey, Austin García-Macías, Enrique Rallini, Marco Materazzi, A. Luigi Torre, Luigi Laflamme, Simon Castro-Triguero, Rafael Ubertini, Filippo |
Departamento | Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras |
Fecha de publicación | 2018 |
Fecha de depósito | 2018-03-21 |
Publicado en |
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Resumen | The availability of new self-sensing cement-based strain sensors allows the development
of dense sensor networks for Structural Health Monitoring (SHM) of reinforced concrete structures.
These sensors are fabricated by ... The availability of new self-sensing cement-based strain sensors allows the development of dense sensor networks for Structural Health Monitoring (SHM) of reinforced concrete structures. These sensors are fabricated by doping cement-matrix mterials with conductive fillers, such as Multi Walled Carbon Nanotubes (MWCNTs), and can be embedded into structural elements made of reinforced concrete prior to casting. The strain sensing principle is based on the multifunctional composites outputting a measurable change in their electrical properties when subjected to a deformation. Previous work by the authors was devoted to material fabrication, modeling and applications in SHM. In this paper, we investigate the behavior of several sensors fabricated with and without aggregates and with different MWCNT contents. The strain sensitivity of the sensors, in terms of fractional change in electrical resistivity for unit strain, as well as their linearity are investigated through experimental testing under both quasi-static and sine-sweep dynamic uni-axial compressive loadings. Moreover, the responses of the sensors when subjected to destructive compressive tests are evaluated. Overall, the presented results contribute to improving the scientific knowledge on the behavior of smart concrete sensors and to furthering their understanding for SHM applications. |
Agencias financiadoras | Ministerio de Educación. España |
Identificador del proyecto | FPU13/04892 |
Cita | Meoni, A., D’Alessandro, A., Downey, A., García-Macías, E., Rallini, M., Materazzi, A.L.,...,Ubertini, F. (2018). An Experimental Study on Static and Dynamic Strain Sensitivity of Embeddable Smart Concrete Sensors Doped with Carbon Nanotubes for SHM of Large Structures. Sensors, 18 (3), 831-. |
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