Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
권호 표지

A Study on the Measurement of Acoustic Emission and Deformation Behaviors of Rock and Concrete under Compression

암석 및 콘크리트의 압축변형거동과 미소파괴음 측정에 관한 연구

  • 심현진 ((주)덕천엔지니어링 부설연구소 연구원) ;
  • 이정인 (서울대학교 지구환경시스템공학부)
  • Published : 2000.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Acoustic emission is n burst of microseismic waves generated by microscopic failure due to deformation in materials. The study on the detection of initiation and propagation of microcracks from acoustic emission measurement is very important for the evaluation of the stability of underground rock structures by the nondestructive letting method. In this study, acoustic emission was measured under uniaxial stiffness loading test used to obtain the complete stress-strain curves of marble and concrete used as reinforced materials of rock structures. The analysis of acoustic emission parameters and source location were performed to discuss the characteristics of the deformation and failure behavior of rock and concrete. And acoustic emission was measured under cyclic loading test to verify the Kaiser effect associated with the damage of materials, in situ stress of rock, and stress history of concrete structure.

암석 재료의 변형에 따른 미시적 파괴 현상으로부터 발생하는 미소파괴음(Acoustic Emission, AE)을 측정하여 암석 구조물 내의 미세균열의 생성과 전파를 탐지하는 연구는 지하 암반 구조물의 안정성을 비파괴검사로 평가하는데 대단히 중요하다. 본 연구에서는 암반 구조물의 보강재로 사용되는 콘크리트와 대리석 암석 시험관에 대하여 전과정 응력-변형률 곡선을 얻기 위한 강성압축시험을 실시하였고, 시험 중에 미소파괴음 발생을 측정하여 미소파괴음 파라미터 분석 및 음원추적을 수행하여 대리석과 콘크리트의 변형 및 파괴거동 특성을 살펴보았다. 또한 시험편에 계단식 반복재하시험을 수행하여 그 변형거동을 고찰하였으며, 미소파괴음 측정을 통하여 재료의 손상, 암반의 현지응력 및 콘크리트 구조물의 응력이력 등과 관련된 카이저효과를 검증하였다

Keywords

References

  1. Overview of Acoustic Emission Monitoring of Rock Structures Koerner, R.M.;McCabe, W.M.;Lord, Jr., A.E.
  2. Rock Mech. Rock Eng. v.27 no.3 Acoustic Emission from Failing Rock Behaviour Mansurov, V.A.
  3. ISRM proceedings v.1 A study on the uniaxial compression behaviors and acoustic emission characteristics of rock in Taiwan Shi, L.P.;Huang, T.H.(etc.)
  4. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.34 no.3;4 Changes in Acoustic Event Properties with Progressive Fracture Damage Eberhardt, E.;Stead, D.;Stimpson, B.;Read, R.S.
  5. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.35 no.2 Experimental Procedures to Measure Volumetric Changes and Microseismic Activity During Triaxial Compression Tests Butt, S.D.;Calder, P.N.
  6. Doctoral Thesis, Technische Hochshule Munchen A study of acoustic phenomena in tensile test Kaiser, E.J.
  7. Proc. 8th Japan Symp. on Rock Mechanics Estimation of geostress from AE characteristics in cyclic loading of rock(in Japanese) Seto, M.;Utagawa, M.;Katsuyama, K.
  8. Environmental and Safety Concerns in Underground Construction v.2 Application of acoustic emission technique to determination of in situ stress Seto, M.;Utagawa, M.;Katsuyama, K.
  9. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.35 no.4;5 In situ stress determination using AE and DRA techniques Seto, M.;Utagawa, M.;Katsuyama, K.;Kiyama, T.
  10. Geophys. Res. Lett. v.20 Observations of the Kaiser effect under multiaxial stress state: Implications for its use in determining in situ stress Holcomb, D.J.
  11. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.30 no.7 Assessment of Damage in Rock Using the Kaiser Effect of Acoustic Emission Li, C.;Nordlund, E.
  12. Rock Fragmentation by Blasting Evaluation of rock mass damage using acoustic emission technique Seto, M.;Nag, D.K.;Vutukuri, V.S.
  13. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.33 no.6 An Acoustic Emission Study of Damage Development and Stress-Memory Effects in Sandstone Pestman, B.J.;Van Munster, J.G.
  14. J. of Korean Inst. of Min. and Mining Engineers v.14 no.4 A study on post-failure deformations of coal measure rocks under the stiff loading compression Lee, C.I.
  15. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.16 Crack-crack and crack-pore interactions in stressed granite Kranz, R.L.
  16. Int. J. Rock. Mech. Min. Sci. & Geomech. Abstr. v.30 no.3 Crack Development and Acoustic Emission in Potash Rock Mlakar, V.;Hassani, F.P.;Momayez, M.