지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국지반공학회 International Journal of Geo-Engineering International Journal of Geo-Engineering 제3권 제4호
- 발행연도
- 2011.12
- 수록면
- 15 - 27 (13page)
이용수
초록· 키워드
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Granular soils, which are assemblies of discrete particles, may show spatially heterogeneous deformation behavior due to the local rearrangement and individual movement of particles under external loading condition. To understand the behavior of soils during a whole shearing process, the spatial distribution and evolution of deformation within the entire specimen need to be evaluated. In the present study, vertical compression tests under plane strain condition were performed on Jumunjin sand and artificially sieved coarse sand from the weathered soil, while capturing digital images of the specimen through the transparent side wall at regular interval. The displacements were continuously computed via an optimal digital image analysis with tracking determined grid points. The strains were then calculated from the field of accumulated displacement vectors. Finally, the spatial distribution of deformation was evaluated by analyzing the strain contours. It demonstrates that the strain localization is intensified as the specimen approaches to the peak stress state, and the shear band is then clearly formed just after the peak. Additionally, the evolution of mean and variation of the strains according to the global vertical strain was analyzed during the entire shearing process. As dividing the specimen into shear band zone and sliding wedge zone, it was found that different behaviors of two zones are not observed at the initial state. Meanwhile, after the peak stress state, the deformation is mostly concentrated into the shear band. At the final state, it was also observed that the void ratio is almost constant and attains to the critical state in spite of continuously generated shear deformation.
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UCI(KEPA) : I410-ECN-0101-2020-531-000198665