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http://dx.doi.org/10.7843/kgs.2012.28.3.15

Effect of Specimen Size on Undrained and Drained Shear Characteristics of Granular Soils  

Park, Sung-Sik (Dept. of Civil Engineering, Kyungpook National Univ.)
Choi, Sun-Gyu (Dept. of Civil Engineering, Kyungpook National Univ.)
Kim, Dong-Rak (Dept. of Civil Engineering, Kyungpook National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.3, 2012 , pp. 15-23 More about this Journal
Abstract
An internal friction angle, which is one of strength parameters of granular soils, can be obtained from direct shear tests or triaxial tests. The result of traixial tests can be influenced by various experimental conditions such as confining pressure, shearing rate, specimen diameter and height, and end constraint. In this study, undrained and drained shearing behaviors of Nakdong River sand were investigated for loose (Dr = 40%) and dense (Dr = 80%) specimens with 5, 7, and 10 cm in diameter. Friction angles such as undrained total stress friction angle, undrained effective stress friction angle, and drained friction angle obtained from Mohr's stress circle slightly increased and then decreased as a diameter of a specimen increased from 5, 7 to 10 cm, regardless of relative densities. The difference between friction angles caused by different specimen size was at maximum 4.5 degrees for undrained total stress friction angle of dense specimen. In most cases, there was little difference between friction angles of large and small specimens, which was less than 2 degrees. The difference between an effective friction angle from undrained tests and a drained friction angle from drained tests was at maximum 7 degrees for loose samples but negligible for dense samples.
Keywords
Diameter; Drainage condition; Friction angle; Sand;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Baldi, G. and Nova, R. (1984), "Membrane penetration effects in traixial testing", Journal of Geotechnical Engineering, Vol.110, pp.403-420.   DOI
2 Cerato, A. B. and Lutenegger, A. J. (2006), "Specimen size and scale effects of direct shear box tests of sands", Geotechnical Testing Journal, Vol.29, No.6, pp.1-10.
3 Chen, C.W. (2006), "Drained and undrained behavior of fiber-reinforced sand", Transportation Scholars Conference, Iowa State University, November 15, 2006.
4 Goto, S. and Tatsuoka, F. (1988), "Influence of several testing conditions in triaxial compression tests on sands and gravels", Tsuchi-to-Kiso, JGS, Vol.36, No.9, pp.13-18.
5 Ikemi, M., Tani, K., Okada, T., and Tanaka, Y. (1998), "Triaxial compression tests of soft rock specimen of 35-500 mm", Proc. of 10th Domestic Symp. on Rock Mechanics, pp.13-18.
6 Kodaka, T., Itabashi, K., Nakasima, K., Makita, Y., and Lee, K.-T. (2010), "Evaluation of deformation and strength characteristics of sandy gravel in rive embankments (in Japanese)", Geotechnical Engineering Journal, Vol.5, No.2, pp.193-205.
7 Lade, P. V. and Hernandez, S. B. (1977), "Membrane Penetration Effects in Undrained Tests," Journal of the Geotechnical Engineering Division, Vol.103, No.GT2, pp.109-125.
8 Nabeshima, Y., Oda, K., and Matsui, T. (1999), "Performance of mini-triaxial test and its practical applications to soil investigation", International Journal of Offshore and Polar Engineering, Vol.9, No.2, pp.105-111.
9 Vaid, Y. P. and Sivathayalan, S. (2000), "Fundamental factors affecting liquefaction susceptibility of sands", Canadian Geotechnical Journal, Vol.37, pp.592-606.   DOI   ScienceOn
10 Vaid, Y.P., Uthayakumar, M., Sivathayalan, S., Robertson, P.K., and Hofmann, B. (1995), "Laboratory testing of Syncrude sand", Proceedings of the 48th Canadian Geotechnical Conference, Vancouver, Vol.1, pp.223-232.
11 박성식, 김영수 (2011), 모래 지반 내에 포함된 자갈의 크기가 전단 거동에 미치는 영향, 대한토목학회논문집, 제31권 1C호, pp.39-51.