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Investigation on Impact-echo Testing Method for Rock Specimens  

Cho, Jung-Woo (서울대학교 에너지시스템공학부)
Lim, Bo-Sung (서울대학교 에너지시스템공학부)
Cho, Ho-Bum (서울대학교 에너지시스템공학부)
Jeon, Seok-Won (서울대학교 에너지시스템공학부)
Ha, Hee-Sang (지오맥스㈜)
Publication Information
Tunnel and Underground Space / v.17, no.2, 2007 , pp. 83-89 More about this Journal
Abstract
Impact-echo test is a non-destructive testing method to determine dynamic properties of a material. This presentation introduces the experimental set-up and procedure of the test for rock specimens. In addition, the test results of domestic rocks collected in 5 different areas, a cement mortar and aluminium alloy are presented. The test results include resonance frequencies of P- and S-wave as well as damping ratios of the described 7 different materials. The differences between dynamic and static values of elastic moduli are about 10%, while the dynamic Poisson's ratios are greater than the static Poisson's ratios by at least 0.07. The damping ratio is dependent on the joint density and degree of weathering of a rock specimen.
Keywords
Impact-echo method; Rock specimens; Dynamic physical properties; Resonance frequency; Damping ratio;
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  • Reference
1 Richard, F. E., Woods, R. D., Hall, J. R., 1970, Vibration of soils and foundations, Prentice-Hall Inc. pp. 5-80
2 목영진, 1999, 자유단 공진시험을 이용한 암석의 탄성계수 측정, 한국지진공학회 논문집, 제3권, 제4호, pp. 95-100
3 ASTM, 2003, Standard test method for Fundamental transverse, longitudinal, and torsional resonant frequencies of concrete specimens, designation: C215-02
4 Barton, N, 2006, Rock quality, seismic velocity, attenuation and anisotropy, Taylor & Francis, pp. 3-48
5 조미라, 김기봉, 조성호, 2000, 콘크리트 구조물 비파괴 평가를 위한 수정 충격반향 기법의 제안, 건설환경논문집, 제12권, 제1호, pp. 173-186
6 Lin, J., Sansalone, M., and Carino, N. J., 1990, Finite element studies of the Impact-Echo Response of plates containing thin layers and voids, Journal of Nondestructive Evaluation, Vol. 9, No.1, pp. 27-47   DOI
7 신종진, 전석원, 2000, 암석 내의 균열전파에 따른 유효탄성계수의 변화, 터널과 지하공간 (한국암반공학회지), 제10권, pp. 301-308