Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/89526
Title: | Modelling effects of recent suction history on small-strain stiffness of unsaturated soil | Authors: | Kaewsong, R Zhou, C Ng, CWW |
Issue Date: | Apr-2019 | Source: | Canadian geotechnical journal, Apr. 2019, v. 56, no. 4, p. 600-610 | Abstract: | Recent suction history has been found to affect shear modulus of unsaturated soil at small strains (i.e., from 0.001% to 1%). In this study, a bubble model for unsaturated soil is developed within the framework of kinematic hardening and bounding surface plasticity. An elliptical elastic bubble is defined inside a modified Cam-clay bounding surface. Being a key feature of the proposed model, the size of the elastic bubble is modelled as a function of suction, degree of saturation, and plastic volumetric strain. Translation of the elastic bubble is governed by suction, degree of saturation, and stress increments. Moreover, hardening modulus depends on not only stress and void ratio, but also suction, degree of saturation, and relative position of the elastic bubble and the bounding surface. The proposed model is evaluated using suction-controlled constant-p shear tests on completely decomposed tuff (silt). It is evident that the new model is capable of capturing well the effects of recent suction history on nonlinear stress–strain relation and shear modulus degradation at small strains. | Keywords: | Constitutive model Small-strain modulus Unsaturated soil |
Publisher: | NRC Research Press | Journal: | Canadian geotechnical journal | ISSN: | 0008-3674 | DOI: | 10.1139/cgj-2017-0343 | Rights: | Copyright remains with the author(s) or their institution(s). The following publication R. Kaewsong, C. Zhou, and C.W.W. Ng. Modelling effects of recent suction history on small-strain stiffness of unsaturated soil. Canadian Geotechnical Journal. 56(4): 600-610 is available at https://doi.org/10.1139/cgj-2017-0343. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
a0692-n14_979_Final_(12).pdf | Pre-Published version | 1.59 MB | Adobe PDF | View/Open |
Page views
50
Last Week
0
0
Last month
Citations as of Apr 28, 2024
Downloads
24
Citations as of Apr 28, 2024
SCOPUSTM
Citations
5
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
6
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.