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- W4311761944 endingPage "105182" @default.
- W4311761944 startingPage "105182" @default.
- W4311761944 abstract "The reinforcement mechanism of geogrids has not been fully revealed. Using the discrete element method (DEM), this study conducts a series of numerical direct shear tests on the interface between the geogrid and the non-spherical aggregate for optimization strategies of the aperture ratios considering the initial interlocking states. The micromechanical parameters of the geogrid and the sphere-clump are calibrated using existing experimental data. The reinforcement mechanism of the geogrid is revealed by monitoring the passive resistance of the transverse ribs, the percentage of slipping contact in the shear band, and volumetric responses. Results show that the optimal reinforcement performance can be achieved when A/D50 = 2.53 along with full-level initial interlocking and high flexural rigidity. The evolution of particle contacts in the apertures is introduced to evaluate the interlock losses in the post-peak stage, which explain the strain-softening characteristic of the geogrid–aggregate interface. The passive resistance of the transverse ribs is the dominant factor of improving the reinforcement performance in the direct shear mode. The tension-to-compression mode of a rigid geogrid can substantially enhance the passive resistance. The results provide a better insight into the geosynthetic optimization in the analysis and design of related engineering projects." @default.
- W4311761944 created "2022-12-28" @default.
- W4311761944 creator A5011281136 @default.
- W4311761944 creator A5087563808 @default.
- W4311761944 date "2023-02-01" @default.
- W4311761944 modified "2023-10-14" @default.
- W4311761944 title "DEM simulation of geogrid–aggregate interface shear behavior: Optimization of the aperture ratio considering the initial interlocking states" @default.
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- W4311761944 doi "https://doi.org/10.1016/j.compgeo.2022.105182" @default.
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