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Dynamic Deformation Characteristics of Sands Under Various Drainage Conditions  

Choo Yun-Wook (Dept. of Civil & Environmental Engrg., KAIST)
Kim Dong-Soo (Dept. of Civil & Environmental Engrg., KAIST)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.3, 2005 , pp. 27-42 More about this Journal
Abstract
In this study, dynamic deformation characteristics of sands under dry, saturated drained and undrained conditions were investigated at small to intermediate strains using the modified Stokoe-type torsional shear tests. The equipment was modified to saturate the specimen and to maintain the B-value above 0.99 during the test. On two types of sands, Geumgang sand from Korea and Toyoura sand from Japan, tests were carried out at various drainage conditions, void ratios, and effective confining pressures. Based on the test results, dynamic deformation characteristics, shear modulus (G) and damping ratio (D), and/or pore-water pressure were measured with strain amplitude and number of loading cycles. Variations of G and D at small ($\gamma_c<{10}^{-3}\%$) to medium (${10}^{-3}\%<\gamma_c<{10}^{-1}\%$) strains were measured under various drainage conditions, and test results were intensively compared considering drainage conditions.
Keywords
Damping ratio; Drainage conditions; Saturation; Shear modulus; Torsional shear tests;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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