2024-03-28T23:22:11Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02002010
2022-02-14T21:21:04Z
1642837622505:1642837855274:1642837861518
1642838403551:1642838406845
飽和砂の繰り返し一面セン断試験に関する実験的研究
An Experimental Study on Repetitional Direct Shear Test of Saturated Sand
許, 光瑞
加藤, 進
Kyo, Kozui
Kato, Susumu
Saturated Sand
Direct Shear Test
Repetitional Shearing
Experimental Study
Relative Density
Angle of Shearing Resistance
Damping Factor
The usual type of direct shear test apparatus was improved to be sheared repetitionally in order to obtain the approximate characteristics of repetitional shear of soils. The authors have reported formerly some results of dry sand using the above apparatus. Herein, some experimental results on saturated sand are shown using the same apparatus.\nThe experiment was conducted in three kind of relative densities (Loose state: D_r=25%, Medium state: Dr_=54%, and Dense state: D_r=78%), and Toyoura uniform sand was used. The shearing test are conducted in two cases, such as: 1) Single direction shearing, 2) Repetitional shearing under a given displacement.\nThe following results are obtained: 1) The shearing resistance τ_m increases as the repetitional cycles N increases during the displacement of repetition of cycles D_H (x 10^<-2> mm) smaller than ±150 in dense state, ±200 in medium state, and ±300 in loose state. 2) The hystorical damping factor h obtained here was in the range of h=26.0~31.5%. 3).The angle of shearing resistance φ obtained after repetitional shear test show a slight increase comparing with the single direction shearing when the repetitional displacement was conducted under D_H=±50~±100. The increasing of φ could be consider as the density increasing caused by the repetitional shearing.
紀要論文
http://purl.org/coar/resource_type/c_6501
琉球大学工学部
VoR
http://hdl.handle.net/20.500.12000/1988
0389-102X
AN0025048X
琉球大学工学部紀要
31
39
31
jpn
open access