A Study on the Integrity Assessment of Bare Concrete Bridge Deck based on the Attenuation of Radar Signals

레이더 신호의 감쇠특성을 고려한 일체식 콘크리트 교량 바닥판의 상태평가 방법 고찰

  • Received : 2016.03.15
  • Accepted : 2016.05.02
  • Published : 2016.07.01


The signal characteristic of radar wave on concrete decks is determined by the attenuation of the radar due to the conversion of EM(Electromagnetic) energy to thermal energy through electrical conduction, dielectric relaxation, scattering, and geometric spreading. In this study, it is found that the attenuation of radar signal received on top rebars in bare deck concrete with 2 way travel time shows a general decreasing linear trend because of its same relative permittivity and conductivity. The radar signal after depth-normalization, can then be interpreted as being principally influenced by the content of chlorides penetrating cover concrete, which caused corrosion of rebars in bridge decks.




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