Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Study on Shear Behavior of Geocell-reinforced Layer Based on Large-scale Direct Shear Tests
https://orcid.org/https://orcid.org/0000-0002-0521-0651
https://orcid.org/https://orcid.org/0000-0003-3226-6535
Although geocells have been extensively used to improve the performance of road embankments and slopes, their positive effect on shear strength under various shear failure scenarios has not been sufficiently emphasized. This paper attempts to fill this research gap through a series of numerical studies and presents ongoing research. First, FLAC3D is adopted to simulate two large-scale direct shear tests, and the outcomes are compared with laboratory test results reported in the literature. Then, the layout of the geocell in the shear box, the angle between the geocell layer and the shear plane, and the aspect ratio of the geocells are investigated to analyze the effects of each factor on the shear strength of the geocell-reinforced layer. The findings confirm that the geocell-reinforced layer exhibits substantial anisotropy, which is caused by variations in the shear failure plane. When the shear plane is near the center of the geocell, or the angle between the shear plane and the horizontal plane is less than 45 degrees, the geocells can provide higher shear strength. The shear strength of the geocell-reinforced layer can also be improved by increasing the aspect ratio or geocell height, where the apparent cohesiveness and friction angle are increased by 156% and 13%, respectively, over a range of aspect ratios from 0.394 to 1.575.
Numerical Study on Shear Behavior of Geocell-reinforced Layer Based on Large-scale Direct Shear Tests
https://orcid.org/https://orcid.org/0000-0002-0521-0651
https://orcid.org/https://orcid.org/0000-0003-3226-6535
Although geocells have been extensively used to improve the performance of road embankments and slopes, their positive effect on shear strength under various shear failure scenarios has not been sufficiently emphasized. This paper attempts to fill this research gap through a series of numerical studies and presents ongoing research. First, FLAC3D is adopted to simulate two large-scale direct shear tests, and the outcomes are compared with laboratory test results reported in the literature. Then, the layout of the geocell in the shear box, the angle between the geocell layer and the shear plane, and the aspect ratio of the geocells are investigated to analyze the effects of each factor on the shear strength of the geocell-reinforced layer. The findings confirm that the geocell-reinforced layer exhibits substantial anisotropy, which is caused by variations in the shear failure plane. When the shear plane is near the center of the geocell, or the angle between the shear plane and the horizontal plane is less than 45 degrees, the geocells can provide higher shear strength. The shear strength of the geocell-reinforced layer can also be improved by increasing the aspect ratio or geocell height, where the apparent cohesiveness and friction angle are increased by 156% and 13%, respectively, over a range of aspect ratios from 0.394 to 1.575.
Numerical Study on Shear Behavior of Geocell-reinforced Layer Based on Large-scale Direct Shear Tests
https://orcid.org/https://orcid.org/0000-0002-0521-0651
https://orcid.org/https://orcid.org/0000-0003-3226-6535
Although geocells have been extensively used to improve the performance of road embankments and slopes, their positive effect on shear strength under various shear failure scenarios has not been sufficiently emphasized. This paper attempts to fill this research gap through a series of numerical studies and presents ongoing research. First, FLAC3D is adopted to simulate two large-scale direct shear tests, and the outcomes are compared with laboratory test results reported in the literature. Then, the layout of the geocell in the shear box, the angle between the geocell layer and the shear plane, and the aspect ratio of the geocells are investigated to analyze the effects of each factor on the shear strength of the geocell-reinforced layer. The findings confirm that the geocell-reinforced layer exhibits substantial anisotropy, which is caused by variations in the shear failure plane. When the shear plane is near the center of the geocell, or the angle between the shear plane and the horizontal plane is less than 45 degrees, the geocells can provide higher shear strength. The shear strength of the geocell-reinforced layer can also be improved by increasing the aspect ratio or geocell height, where the apparent cohesiveness and friction angle are increased by 156% and 13%, respectively, over a range of aspect ratios from 0.394 to 1.575.
Numerical Study on Shear Behavior of Geocell-reinforced Layer Based on Large-scale Direct Shear Tests
KSCE J Civ Eng
Zhao, Yang (Autor:in) / Lu, Zheng (Autor:in) / Liu, Jie (Autor:in) / Yao, Hailin (Autor:in)
KSCE Journal of Civil Engineering ; 28 ; 2613-2624
01.07.2024
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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