Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on the Statistical Distribution of Ultrasonic Velocities for the Condition Evaluation of Concrete Wide Beam

콘크리트 넓은 보의 상태평가를 위한 초음파 속도의 통계학적 분포에 대한 연구

  • Yoon, Young-Geun (Department of Safety and Environmental Systems Engineering, Incheon National University) ;
  • Lee, In-Bok (Department of Safety and Environmental Systems Engineering, Incheon National University) ;
  • Sa, Min-Hyung (Department of Safety and Environmental Systems Engineering, Incheon National University) ;
  • Oh, Tae Keun (Department of Safety and Environmental Systems Engineering, Incheon National University)
  • Received : 2017.02.22
  • Accepted : 2017.03.22
  • Published : 2017.04.30
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Abstract

The ultrasonic pulse velocities of pressure, shear, and Rayleigh waves ( P-, S-, and R- waves) have been used for the condition evaluation of various concrete structures, but the statistical distribution according to the wave type has not been studied clearly in view of data reliability and validity. Therefore, this study analyzed the statistical distribution of P-, S-, R-wave velocities in concrete wide beams of $800{\times}3100mm$ (width ${\times}$ length) with a thickness of 300 mm. In addition, we investigated an experimental consistency by the Kolmogorov-Smirnov goodness-of-fit test. The experimental data showed that the R-, S- and P- wave velocities in order have better statistical stability and reliability for in situ evaluation because R- and S-waves are less sensitive to confinement and boundary conditions. Also, good correlations between wave velocities and strength and modulus of elasticity were found, which indicate them as appropriate techniques for estimating the mechanical properties.

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References

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