비파괴충격파 시험법을 이용한 동탄성계수 평가 = Evaluation of the Dynamic Modulus by using the Impact Resonance Testing Method

다국어 초록 (Multilingual Abstract)

PURPOSES: The dynamic modulus for a specimen can be determined by using either the non-destructed or destructed testing method. TheImpact Resonance Testing (IRT) is the one of the non-destructed testing methods. The MTS has proved the source credibility and has thedisadvantages which indicate the expensive equipment to operate and need a lot of manpower to manufacture the specimens because of the lowrepeatability with an experiment. To overcome these shortcomings from MTS, the objective of this paper is to compare the dynamic modulusobtained from IRT with MTS result and prove the source credibility.
METHODS: The dynamic modulus obtained from IRT could be determined by using the Resonance Frequency (RF) from the FrequencyResponse Function (FRF) that derived from the Fourier Transform based on the Frequency Analysis of the Digital Signal Processing (DSP)(S.
O. Oyadigi; 1985). The RF values are verified from the Coherence Function (CF). To estimate the error, the Root Mean Squared Error (RMSE)method could be used.
RESULTS : The dynamic modulus data obtained from IRT have the maximum error of 8%, and RMSE of 2,000MPa compared to thedynamic modulus measured by the Dynamic Modulus Testing (DMT) of MTS testing machine..
CONCLUSIONS: The IRT testing method needs the prediction model of the dynamic modulus for a Linear Visco-Elastic (LVE) specimento improve the suitability.

참고문헌 (Reference)

1 장병관, "충격공진시험을 이용한 다양한 공극률을 가진 투수성 아스팔트 혼합물의 동탄성계수 변화 측정에 관한 연구" 한국도로학회 15 (15): 65-74, 2013

2 양성린, "중온아스팔트 혼합물의 현장 적용성 및 실내 공용성 평가" 한국도로학회 14 (14): 9-18, 2012

3 권기철, "아스팔트 콘크리트 탄성계수 결정을 위한 충격공진시험 영향요소 평가" 한국도로학회 9 (9): 89-99, 2007

4 이관호, "아스팔트 바인더의 노화특성을 고려한 동탄성계수 평가" 한국방재학회 8 (8): 51-58, 2008

5 장병관, "비파괴 충격파를 이용한 아스팔트 공시체의 수분민감도 평가" 한국도로학회 15 (15): 53-63, 2013

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