Advances in Civil Engineering / 2020 / Article / Tab 1

Research Article

Discrete Element Analysis of the Load Transfer Mechanism of Geogrid-Ballast Interface under Pull-Out Load

Table 1

Micromechanical parameter of the DEM model [15].

CategoryMicromechanical parameterBallastGeogrid

ParticleDensity, ρ (kg/m3)2700800
Porosity0.45
Linear bondNormal stiffness, kn (N/m)0.52 × 1081.77 × 107
Shear stiffness, ks (N/m)0.52 × 1080.88 × 107
Coefficient of friction, u0.80.5
Parallel bondNormal stiffness, knp (N/m3)5.68 × 1011
Shear stiffness, ksp (N/m3)5.68 × 1011
Normal strength, snp (N/m2)4.56 × 108
Shear strength, ssp (N/m2)4.56 × 108
Radius multiplier, rp0.5

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