Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2005.03a
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- Pages.529-536
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- 2005
Prediction for degradation of strength and stiffness of fine grained soil using Direct Simple Shear Test (DSST)
직접단순전단시험을 통한 세립토의 강도와 강성저하 예측
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Song, Byung-Woong
(Geotechnical Eng. Dept. Dasan Consultants) ;
- Yasuhara, kazuya (Dept. of Urban and Civil Eng., Ibaraki University) ;
- Kim, Jeong-Ho (Geotechnical Eng. Dept. Dasan Consultants) ;
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Choi, In-Gul
(Geotechnical Eng. Division, Yooshin Eng. Corporation) ;
- Yang, Tae-Seon (Kimpo College)
-
송병웅
((주)다산컨설턴트 지반공학부) ;
- 안원일재 (자성대학 도시시스템공학과) ;
- 김정호 ((주)다산컨설턴트 지반공학부) ;
-
최인걸
((주)유신코퍼레이션 지반공학부) ;
- 양태선 (김포대학 환경토목과)
- Published : 2005.03.25
Abstract
Based on an estimating method for post-cyclic strength and stiffness with cyclic triaxial tests, Direct Simple Shear (DSS) tests were carried out to confirm whether the method can be adapted to DSS test on fine-grained soils: silty clay, plastic silt, and non-plastic silt. Results from post-cyclic DSS tests were interpreted by a modified method as adopted for post-cyclic triaxial tests. In particular, influence of plasticity index for fine-grained soils was emphasised. Findings obtained from the present study are: (i) the higher the plasticity index of fine-grained soils is, the less not stiffness ratio but strength ratio decreases with increment of a normalised excess pore water pressure; and (ii) post-cyclic strength and stiffness results from DSS tests agree well with those predicted by the method modified from a procedure used for triaxial test results.