Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of particle shape on cyclic liquefaction resistance of granular materials
https://orcid.org/http://orcid.org/0000-0003-2067-8161
This study adopts three-dimensional discrete element method to examine how particle shape affects the cyclic liquefaction resistance of granular materials. A family of superquadric particles is employed to model different particle shapes by varying two shape parameters: aspect ratio (AR) and blockiness (B). Five smooth and convex particle shapes are considered in this study, with AR ranging from 0.5 to 1.5, and B varying from 2 to 8. These particles are used to create isotropically compressed samples at an initial confinement of 100 kPa and two relative densities (Dr) of 20% and 50%, resulting in ten samples. These samples are then subjected to constant-volume cyclic simple shearing with various levels of cyclic stress ratios until initial liquefaction occurs in 41 simulations. The results of these simulations reveal that at Dr=20%, the spherical particles exhibit the highest liquefaction resistance compared to the non-spherical particles. However, this trend is reversed for the samples with Dr=50%. By employing the overall regularity (OR) as a synthetic descriptor of particle shape, it is observed that liquefaction strength generally increases with higher OR at Dr=20%, while it demonstrates an approximately decreasing trend at Dr=50%. Furthermore, the initial coordination number and two critical state parameters based on the void ratio and the coordination number at the pre-shearing state of the samples, demonstrate a strong correlation with the cyclic liquefaction resistance within the ranges of particle shape and Dr considered in this study.
Effect of particle shape on cyclic liquefaction resistance of granular materials
https://orcid.org/http://orcid.org/0000-0003-2067-8161
This study adopts three-dimensional discrete element method to examine how particle shape affects the cyclic liquefaction resistance of granular materials. A family of superquadric particles is employed to model different particle shapes by varying two shape parameters: aspect ratio (AR) and blockiness (B). Five smooth and convex particle shapes are considered in this study, with AR ranging from 0.5 to 1.5, and B varying from 2 to 8. These particles are used to create isotropically compressed samples at an initial confinement of 100 kPa and two relative densities (Dr) of 20% and 50%, resulting in ten samples. These samples are then subjected to constant-volume cyclic simple shearing with various levels of cyclic stress ratios until initial liquefaction occurs in 41 simulations. The results of these simulations reveal that at Dr=20%, the spherical particles exhibit the highest liquefaction resistance compared to the non-spherical particles. However, this trend is reversed for the samples with Dr=50%. By employing the overall regularity (OR) as a synthetic descriptor of particle shape, it is observed that liquefaction strength generally increases with higher OR at Dr=20%, while it demonstrates an approximately decreasing trend at Dr=50%. Furthermore, the initial coordination number and two critical state parameters based on the void ratio and the coordination number at the pre-shearing state of the samples, demonstrate a strong correlation with the cyclic liquefaction resistance within the ranges of particle shape and Dr considered in this study.
Effect of particle shape on cyclic liquefaction resistance of granular materials
https://orcid.org/http://orcid.org/0000-0003-2067-8161
This study adopts three-dimensional discrete element method to examine how particle shape affects the cyclic liquefaction resistance of granular materials. A family of superquadric particles is employed to model different particle shapes by varying two shape parameters: aspect ratio (AR) and blockiness (B). Five smooth and convex particle shapes are considered in this study, with AR ranging from 0.5 to 1.5, and B varying from 2 to 8. These particles are used to create isotropically compressed samples at an initial confinement of 100 kPa and two relative densities (Dr) of 20% and 50%, resulting in ten samples. These samples are then subjected to constant-volume cyclic simple shearing with various levels of cyclic stress ratios until initial liquefaction occurs in 41 simulations. The results of these simulations reveal that at Dr=20%, the spherical particles exhibit the highest liquefaction resistance compared to the non-spherical particles. However, this trend is reversed for the samples with Dr=50%. By employing the overall regularity (OR) as a synthetic descriptor of particle shape, it is observed that liquefaction strength generally increases with higher OR at Dr=20%, while it demonstrates an approximately decreasing trend at Dr=50%. Furthermore, the initial coordination number and two critical state parameters based on the void ratio and the coordination number at the pre-shearing state of the samples, demonstrate a strong correlation with the cyclic liquefaction resistance within the ranges of particle shape and Dr considered in this study.
Effect of particle shape on cyclic liquefaction resistance of granular materials
Acta Geotech.
Banerjee, Sounik K. (Autor:in) / Yang, Ming (Autor:in) / Taiebat, Mahdi (Autor:in)
Acta Geotechnica ; 19 ; 4503-4518
01.07.2024
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Cyclic liquefaction , Discrete element method , Granular material , Particle shape , State parameter Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Effect of particle shape on cyclic liquefaction resistance of granular materials
| Springer Verlag | 2024