Development and metrological characterization of cement-based elements with self-sensing capabilities for structural health monitoring purposes
نویسندگان
چکیده
Mortar specimens containing conductive additions (i.e., biochar and recycled carbon fibres – both alone together, graphene nanoplatelets) were characterized from a metrological point of view. Their piezoresistive capability was evaluated, exploiting the 4-electrode Wenner’s method to measure electrical impedance in alternating current (AC); this way, material electrode-material polarization issues avoided. The selected mix-design used manufacture scaled concrete beams serving as demonstrators. Additionally, FEM-based models realized for preliminary analysis modal parameters that will be investigated through impact tests conducted after different loading tests, simulating potential seismic effects. results show combined use fibers provide best performance terms piezoresistivity (with sensitivity 0.109 (µm/m)-1 vs 0.003 reference mortar). Conductive improve Signal-to-Noise Ratio (SNR) increase conductivity, providing suitable tools develop distributed sensor network Structural Health Monitoring (SHM). Such monitoring system could exploited enhance resilience strategic structures infrastructures towards natural hazards. A homogeneous distribution during casting is fundamental measurement repeatability. In fact, intrinsic properties curing effect (hydration phenomena, increasing impedance) cause high variability.
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ژورنال
عنوان ژورنال: Acta IMEKO
سال: 2023
ISSN: ['0237-028X', '2221-870X']
DOI: https://doi.org/10.21014/actaimeko.v12i2.1420