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Unified Model for Small-Strain Shear Modulus of Variably Saturated Soil

Dong, Yi / Lu, Ning / McCartney, John S.

The small-strain shear modulus $G_{0}$ is a property fundamental to the deformation response of soils to dynamic loading. It depends on soil mineralogy, particle characteristics, void ratio, effective stress, and the degree of saturation. Some theories have been established to predict $G_{0}$ of soils under variably saturated conditions. Accordingly, a new unified model was developed for $G_{0}$ of different soils under variably saturated conditions. The model is based on two conceptual mechanisms: material hardening/softening, which is considered using the degree of saturation as a variable, and interparticle contact forces carried by the soil skeleton, which is considered using the effective stress as a variable. By utilizing suction stress theory, it is demonstrated that $G_{0}$ can be correlated to the parameters of the soil-water retention curve. Results from the literature for 22 soils along with new results for 7 soils were used to validate the model under variably saturated conditions and a range of total stresses.

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Unified Model for Small-Strain Shear Modulus of Variably Saturated Soil

Dong, Yi / Lu, Ning / McCartney, John S.

The small-strain shear modulus $G_{0}$ is a property fundamental to the deformation response of soils to dynamic loading. It depends on soil mineralogy, particle characteristics, void ratio, effective stress, and the degree of saturation. Some theories have been established to predict $G_{0}$ of soils under variably saturated conditions. Accordingly, a new unified model was developed for $G_{0}$ of different soils under variably saturated conditions. The model is based on two conceptual mechanisms: material hardening/softening, which is considered using the degree of saturation as a variable, and interparticle contact forces carried by the soil skeleton, which is considered using the effective stress as a variable. By utilizing suction stress theory, it is demonstrated that $G_{0}$ can be correlated to the parameters of the soil-water retention curve. Results from the literature for 22 soils along with new results for 7 soils were used to validate the model under variably saturated conditions and a range of total stresses.

Unified Model for Small-Strain Shear Modulus of Variably Saturated Soil

Dong, Yi / Lu, Ning / McCartney, John S.

The small-strain shear modulus $G_{0}$ is a property fundamental to the deformation response of soils to dynamic loading. It depends on soil mineralogy, particle characteristics, void ratio, effective stress, and the degree of saturation. Some theories have been established to predict $G_{0}$ of soils under variably saturated conditions. Accordingly, a new unified model was developed for $G_{0}$ of different soils under variably saturated conditions. The model is based on two conceptual mechanisms: material hardening/softening, which is considered using the degree of saturation as a variable, and interparticle contact forces carried by the soil skeleton, which is considered using the effective stress as a variable. By utilizing suction stress theory, it is demonstrated that $G_{0}$ can be correlated to the parameters of the soil-water retention curve. Results from the literature for 22 soils along with new results for 7 soils were used to validate the model under variably saturated conditions and a range of total stresses.

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Title:

Unified Model for Small-Strain Shear Modulus of Variably Saturated Soil

Contributors:

Dong, Yi (author) / Lu, Ning (author) / McCartney, John S. (author)

Published in:

Journal of Geotechnical and Geoenvironmental Engineering ; 142

Publication date:

2016-04-26

ISSN:

1090-0241 , 1943-5606

DOI:

https://doi.org/10.1061/(ASCE)GT.1943-5606.0001506

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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