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Cleavage Dependent Indirect Tensile Strength of Pocheon Granite Based on Experiments and DEM Simulation

포천화강암의 결에 따른 간접인장강도 특성에 대한 실험 및 개별요소 수치해석

  • 장리 (한국건설기술연구원 지반연구소) ;
  • 멜빈 디아즈 (과학기술연합대학원대학교(UST) 지반신공간공학과) ;
  • 정성규 (과학기술연합대학원대학교(UST) 지반신공간공학과) ;
  • 김광염
  • Received : 2016.08.16
  • Accepted : 2016.08.26
  • Published : 2016.08.31

Abstract

The purpose of this study is to investigate the influence of cleavages on indirect tensile strength (ITS) of the granite. Brazilian disc tests and ring tests with three different hole sizes were performed. 2D DEM (Discrete Element Method) simulation was employed to further understand the failure process during the tests and the mechanism behind. Results show that ITS decreases across hardway, grain and rift cleavage. Measured average ITS from ring tests is about 2.5 ~ 6.4 times of those measured from Brazilian disc tests, and it decreases with increasing ratio of diameters of inner hole and specimen. Failure pattern in ring tests is influenced by both hole size and relative positions of cleavages parallel and perpendicular to the loading direction.

Keywords

Indirect tensile strength;Ring test;Cleavage anisotropy;DEM simulation

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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