Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Comparative Study on Cross-anisotrupic Elasticity of Granular Soils Based on Lab-scale Triaxial Experiment and Discrete Element Analysis

실내 삼축시험과 개별요소법(DEM)을 이용한 사질토 직교 이방 탄성 특성의 미시역학적 비교 분석

  • Jung, Young-Hoon (Dept. of Civil and Environmental Engrg., Northwestern Univ.) ;
  • Lee, Jae-Hoon (School of Civil, Urban and Geosystem, Seoul National Univ.) ;
  • Chung, Choong-Ki (School of Civil, Urban and Geosystem, Seoul National Univ.)
  • 정영훈 (노스웨스턴대학교 토목공학과) ;
  • 이재훈 (서울대학교 지구환경시스템공학부) ;
  • 정충기 (서울대학교 지구환경시스템공학부)
  • Published : 2007.08.31
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Abstract

The comparative study using the lab-scale experiment and the discrete element analysis is attempted to analyze the cross-anisotropic elasticity of granular soils. The lab-scale experiment consists of the small stress-controlled triaxial cyclic tests and the bender element tests. In the discrete element analysis the simulations of lab-scale cyclic tests are conducted in the various directions. Good agreement between the experimental data and the simulation on the elastic properties in the axial and shear directions confirms the usefulness of the discrete element method. The comparative analysis of the difference in the experimental data and the simulation of radial cyclic tests shows that the discrete element method can successfully be used to check the reasonable magnitude of each measurement in the experiments.

사질토의 직교 이방 탄성계수를 실험적 방법과 개별 요소법을 이용하여 측정하고 결과를 정량적으로 비교-분석하였다. 실내 시험에서는 미소 응력 제어 반복재하시험과 벤더 엘리먼트의 측정 결과를 조합하여 탄성 특성을 구하였으며, 개별 요소법에서는 실내 시험 방법과 상응하는 반복재하시험을 모사하였다. 축 방향 및 전단방향에 관련된 탄성 특성의 비교 결과는 제한된 조건에서도 개별 요소법이 복잡한 실내 시험 과정을 모사할 수 있음을 보여주었다. 방사 방향 재하시험 결과에서 나타난 두 방법 간 차이의 비교 분석 결과는 개별 요소법이 실내 시험으로 구한 개별 측정치의 정량적 타당성을 확인하는데 충분히 활용될 수 있음을 보여준다.

Keywords

References

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