한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2006년도 춘계 학술발표회 논문집
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- Pages.888-895
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- 2006
삼축압축시험을 통한 응력이력에 따른 전단거동의 변화
Effect of the stress history on the shear behavior using a Triaxial compression test
- Kim, Seung-Han (Dept. of Civil Engineering, Korea University) ;
- Choi, Sung-Keun (Dept. of Civil Engineering, Korea University) ;
- Lee, Moon-Joo (Dept. of Civil Engineering, Korea University) ;
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Lee, Woo-Jin
(Dept. of Civil Engineering, Korea University)
- 발행 : 2006.03.24
초록
In this study, anisotropically consolidated undrained shear(CAU) test was performed to examine the variation of the shear strength according to the stress history. The specimen having 30% relative density was homogeniously prepared, and 200KPa of back pressure was applied to increase the B value more than 0.95. To make NC specimens, the vertical stress was applied on the specimen by 100KPa, 200KPa and 400KPa, and to make OC specimens, the vertical stress was applied upto 400KPa and was reduced to 200KPa and 100KPa resulting in OCR 2 and 4 respectively. The test result indicates the shear strength for the OC specimens are slightly higher then that of the NC specimens at the same confining pressure. The elastic modulus varies according to the confining stress and considerably affected by preconsolidation stress.