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Analysis for the Crack Characteristics of Rock and Concrete using Strain and Elastic Wave

변형률과 탄성파를 이용한 암석 및 콘크리트 균열특성분석

  • 최영철 ;
  • 김진섭 (한국원자력연구원 방사성폐기물처분연구부) ;
  • 박태진 (한국원자력연구원 방사성폐기물처분연구부) ;
  • 김건영 (한국원자력연구원 방사성폐기물처분연구부)
  • Received : 2017.08.16
  • Accepted : 2017.08.26
  • Published : 2017.10.31

Abstract

The purpose of this paper is to analyze the crack characteristics by performing the compression test of the rock and concrete specimens. The experiments are carried out by using strain sensors which can measure length change and the AE sensor which can detect the elastic wave from the crack. The crack volumetric strain calculated from measured strain is shown in different shape on the rock and the concrete specimens. This is because the specimens have a different degree of brittleness. However, the crack volumetric strain associated with the fracture and damage was similar to accumulated AE energy of the two specimens. This means that the AE sensor can assess damage in real time without damaging the structure.

Keywords

Rock;Concrete;Crack;Damage degree;AE sensor

Acknowledgement

Supported by : 한국연구재단

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