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Split Ring Resonator Network and Diffused Sensing Element Embedded in a Concrete Beam for Structural Health

Erika Pittella1, Raissa Schiavoni2, Giuseppina Monti2

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This study introduces two integrated sensors for concrete structural health monitoring. These sensors detect dielectric changes and cracks, enabling continuous monitoring of concrete beams throughout their lifecycle.

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Electrical Engineering

Background:

  • Concrete structures require continuous monitoring for safety and longevity.
  • Deterioration due to water ingress and cracking poses significant risks to infrastructure like dams and bridges.
  • Existing monitoring methods may lack comprehensive or continuous coverage.

Purpose of the Study:

  • To propose and integrate two novel sensor types for comprehensive structural health monitoring of concrete beams.
  • To enable diffuse monitoring of dielectric properties during curing and throughout the service life.
  • To provide punctual detection and localization of cracks and water presence.

Main Methods:

  • Development of a diffuse sensing element to monitor dielectric property variations along the entire beam length.
  • Implementation of a split ring resonator network for punctual permittivity evaluation.
  • Integration of both sensor types for complementary monitoring capabilities.

Main Results:

  • The diffuse sensor effectively monitors dielectric changes in concrete during curing and over time.
  • The resonator sensors accurately evaluate permittivity, detecting water presence and drying phases.
  • Punctual sensors successfully detect and localize cracks within the concrete structure.

Conclusions:

  • The integrated sensor system offers a robust solution for continuous structural health monitoring of concrete beams.
  • This technology enhances safety by detecting early signs of deterioration, such as water ingress and cracking.
  • The proposed sensors are suitable for critical infrastructure exposed to water and mechanical stress.