한국전산구조공학회:학술대회논문집 (Proceedings of the Computational Structural Engineering Institute Conference)
- 한국전산구조공학회 2006년도 정기 학술대회 논문집
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- Pages.97-103
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- 2006
초기 재령 콘크리트의 모니터링을 위한 개선된 레일리파 속도 측정 기법
Improved Rayleigh Wave Velocity Measurement Technique for Early-age Concrete Monitoring
- Shin Sung-Woo ;
-
Yun Chung-Bang
;
- Popovics John S. ;
- Song Won-Joon
- 발행 : 2006.04.01
초록
A modified one-sided measurement technique is proposed for Rayleigh wave (R-wave) velocity measurement in concrete. The scattering from heterogeneity may affect the waveforms of R-waves in concrete, which may make the R-waves dispersive. Conventional one-sided techniques do not consider the scattering dispersion of R-waves in concrete. In this study, the maximum energy arrival concept is adopted to determine the wave velocity by employing its continuous wavelet transform. Experimental study was performed to show the effectiveness of the proposed method. The present method is applied to monitor the strength development of early-age concrete. A series of experiments were performed on early-age concrete specimens with various curing conditions. Results reveal that the proposed method can be effectively used to measure the R-wave velocity in concrete structures and to monitor the strength development of early-age concrete.
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