Structural Monitoring and Maintenance

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A near and far-field monitoring technique for damage detection in concrete structures

  • Providakis, Costas (Applied Mechanics Lab, School of Architectural Engineering, Technical University of Crete) ;
  • Stefanaki, K. (Applied Mechanics Lab, School of Architectural Engineering, Technical University of Crete) ;
  • Voutetaki, M. (Applied Mechanics Lab, School of Architectural Engineering, Technical University of Crete) ;
  • Tsompanakis, J. (School of Environmental Engineering Technical University of Crete) ;
  • Stavroulaki, M. (Applied Mechanics Lab, School of Architectural Engineering, Technical University of Crete)
  • Received : 2014.04.12
  • Accepted : 2014.05.08
  • Published : 2014.06.25
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Abstract

Real-time near and far-field monitoring of concrete structural components gives enough information on the time and condition at which damage occurs, thereby facilitating damage detection while in the same time evaluate the cause of the damage. This paper experimentally investigates an integrated monitoring technique for near and far-field damage detection in concrete structures based on simultaneous use of electromechanical admittance technique in combination with guided wave propagation. The proposed sensing system does not measure the electromechanical admittance itself but detect time variations in output voltages of the response signal obtained across the electrodes of piezoelectric transducers bonded on surfaces of concrete structures. The damage identification is based on the spectral estimation MUSIC algorithm. Experimental results show the efficiency and performance of the proposed measuring technique.

Keywords

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