Variation of Small-Strain Shear Modulus of Unsaturated Silt under Successive Cycles of Drying and Wetting

被引：16

作者：

Khosravi, Ali ^{[1
,2
]}

Hashemi, Amirhossein ^{[3
]}

Ghadirianniari, Sahar ^{[4
]}

Khosravi, Mohammad ^{[5
]}

机构：

[1] Oregon State Univ, Sch Civil & Construct Engn, Corvallis, OR 97331 USA

[2] Sharif Univ Technol, Dept Civil Engn, Tehran, Iran

[3] Heriot Watt Univ, Sch Energy Geosci Infrastruct & Soc, Inst Infrastruct & Environm, Edinburgh EH14 4AS, Midlothian, Scotland

[4] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V6T 1Z4, Canada

[5] Montana State Univ, Dept Civil Engn, Bozeman, MT 59717 USA

来源：

JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING | 2020年 / 146卷 / 07期

关键词：

Small-strain shear modulus; Unsaturated soil; Bender element tests; Scanning paths of SWRC; HYDRAULIC HYSTERESIS; RESONANT COLUMN; BENDER ELEMENTS; WAVE VELOCITY; STIFFNESS; STRESS; SOILS; SAND; BEHAVIOR; PRESSURE;

D O I：

10.1061/(ASCE)GT.1943-5606.0002275

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A new framework is developed to extend an existing small-strain shear modulus (Gmax) model to determine Gmax of unsaturated silty soils along different paths of the soil water retention curve (SWRC) including the scanning loops. The suitability of the proposed framework is validated against experimental results of a series of bender-element tests performed in this study and data reported in literature. Measured values of Gmax showed a slight hysteresis in the Gmax measurements along the scanning curves of the SWRC, with lower values along the wetting scanning paths. However, results indicated that the value of Gmax was recovered once the main drying path was reached. Results of this study also indicated that Gmax behavior of the silty specimen along the scanning curves was stress dependent. The model was observed to follow the experimental data along different paths of the SWRC including scanning curves.

引用

页数：13

共 44 条

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