[HTML][HTML] Review of expansive and collapsible soil volume change models within a unified elastoplastic framework

SL Houston, X Zhang - Soils and Rocks, 2021 - SciELO Brasil
Numerous laboratory tests on unsaturated soils revealed complex volume-change response
to reduction of soil suction, resulting in early development of state surface approaches that …

Characterizing and modeling the coupled hydro-mechanical cyclic behavior of unsaturated soils using constant water content oedometer and direct shear tests

B Riad, X Zhang - Transportation Research Record, 2022 - journals.sagepub.com
Most transportation infrastructures are constructed on compacted soils that are typically
unsaturated above the groundwater table. The soils are subjected to cyclic traffic loadings …

Indefinability of Effective Stress for Unsaturated Soils

X Zhang, S Houston - Journal of Geotechnical and …, 2024 - ascelibrary.org
For decades, researchers have searched for an unsaturated soil effective stress that
performs analogously to effective stress for saturated soils and provides some simplifications …

Calibration of BBM parameters using the modified state surface approach

X Zhang, B Riad, EE Alonso - 2023 - scholarsmine.mst.edu
Abstract The Barcelona Basic Model (BBM) developed by Alonso et al.[1] is the first and the
mostwidely used elasto-plastic model for unsaturated soils. The BBM successfully explained …

Consistent Three-Dimensional Elasto-Plastic Model to Study Unsaturated Soil Behavior with Considerations of Coupled Hydro-Mechanical Hysteresis

B Riad, X Zhang - Transportation Research Record, 2021 - journals.sagepub.com
This paper presents a consistent three-dimensional elasto-plastic model to study
unsaturated soil behavior with consideration of coupled hydro-mechanical hysteresis. The …

Using the Modified State Surface Approach to Explain and Simplify the CASM

B Riad, X Zhang - Geo-Congress 2022 - ascelibrary.org
The unified state parameter model for clay and sand (CASM), proposed in 1998, showed
powerful capabilities in representing the behavior of both clayey and sandy soils. However …

Using a 3D Hydro-Mechanical Model to Study the Cyclic Behavior of Unsaturated Soils

B Riad, X Zhang - Geo-Congress 2022, 2022 - ascelibrary.org
Recently, a consistent three-dimensional elasto-plastic model was proposed to study
unsaturated soil behavior with consideration of coupled hydro-mechanical hysteresis …