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You searched for +publisher:"University of New South Wales" +contributor:("Khoshghalb, Arman, Faculty of Engineering, UNSW"). One record found.

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University of New South Wales

1. Yousefnia Pasha, Amin. Study of water retention curve for deformable porous media.

Degree: Civil & Environmental Engineering, 2016, University of New South Wales

The water retention curve (WRC) is a fundamental property of porous media that has extensive applications in different science and engineering disciplines. Past experimental evidence has shown that the WRC evolves with structural changes in soil matrix. This study is aimed to address the shortcomings and ambiguity issues in the previous experimental and modelling works with respect to the WRC for deformable soils. In the experimental program of the study, in addition to the baseline experiments, true constant volume WRCs were obtained in laboratory for the first time in the literature. Based on this data, the evolution of the WRC and the embedded parameters with void ratio were analysed in detail. In addition, pitfalls in the common approaches to obtaining material parameters from WRC, particularly the air entry value (AEV), for deformable soils are discussed in this study, and a consistent graphical approach for the determination of AEV based on an understanding of the effects of stress history and volume change on gravimetric water retention behaviour is presented. This work also presents two modelling approaches to account for the volume change dependency of the WRC in a deformable soil. The first approach is based on energy considerations. The model does not require any additional material parameter apart from the parameters specifying the WRC for the reference volumetric strain and incorporates the effects of hydraulic hysteresis and volume change dependency of the scanning curve which is rarely addressed in the literature. A unique feature of the model is its ability to capture the change in the hydraulic path of the soil from scanning to main in a mechanical loading event.A fractal-based volume dependent WRC model has also been developed in this study. A feature of this model is that it relates the WRC parameters to easily quantifiable parameters. Moreover, the fractal dimension of pore size distribution varies with void ratio in the presented model, an aspect frequently neglected in the literature. The comparison of results from the two models that were developed independently in this study shows that the models generally lead to consistent predictions of the WRC evolution with void ratio. The models provide a basis for correlating the effective stress parameter to the soil textural properties. The application of the models presented in this study is also demonstrated through an extensive comparison between numerical predictions and experimental data from this study and other published works. Very good agreement between model predictions and experimental results is observed highlighting the ability of the proposed models in capturing the volume change dependency of the WRC. These contributions have to date resulted in publication of three journal papers and five conference papers. Advisors/Committee Members: Khalili, Nasser, Faculty of Engineering, UNSW, Khoshghalb, Arman, Faculty of Engineering, UNSW.

Subjects/Keywords: Soil water characteristic curve; Unsaturated soils; Water Retention Curve; Hydromechanical coupling; deformable porous media

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Yousefnia Pasha, A. (2016). Study of water retention curve for deformable porous media. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/56922 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42049/SOURCE02?view=true

Chicago Manual of Style (16th Edition):

Yousefnia Pasha, Amin. “Study of water retention curve for deformable porous media.” 2016. Doctoral Dissertation, University of New South Wales. Accessed July 16, 2019. http://handle.unsw.edu.au/1959.4/56922 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42049/SOURCE02?view=true.

MLA Handbook (7th Edition):

Yousefnia Pasha, Amin. “Study of water retention curve for deformable porous media.” 2016. Web. 16 Jul 2019.

Vancouver:

Yousefnia Pasha A. Study of water retention curve for deformable porous media. [Internet] [Doctoral dissertation]. University of New South Wales; 2016. [cited 2019 Jul 16]. Available from: http://handle.unsw.edu.au/1959.4/56922 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42049/SOURCE02?view=true.

Council of Science Editors:

Yousefnia Pasha A. Study of water retention curve for deformable porous media. [Doctoral Dissertation]. University of New South Wales; 2016. Available from: http://handle.unsw.edu.au/1959.4/56922 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42049/SOURCE02?view=true

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