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Finite element modeling of a geosynthetic pullout test
Abstract Advanced numerical modes used for the description of performance of geosynthetic reinforced soil structures in terms of displacements corresponding to working loads well below collapse levels has created the need for material models for the geosynthetic and geosynthetic-soil interaction accounting for stiffness, yielding and strength properties. A direction dependent isotropic hardening, elastic-plastic-creep model for the geosynthetic, an elastic-perfectly plastic direction and normal stress dependent geosynthetic-soil interaction model, and a bounding surface plasticity model for soil material have been used in a finite element model of a geosynthetic pullout test. Predictions from the model have been compared to a series of pullout tests where it is seen that the model provides reasonable predictions of load-displacement pullout behavior. Systematic removal of material model components has shown that geosynthetic creep properties have a noticeable but minor impact on load-displacement predictions, while geosynthetic plasticity properties have a more significant role for load simulations where the material approaches rupture during pullout. Replacement of the bounding surface plasticity model for the soil material with a linear elastic model resulted in no significant differences in predictions.
Finite element modeling of a geosynthetic pullout test
Abstract Advanced numerical modes used for the description of performance of geosynthetic reinforced soil structures in terms of displacements corresponding to working loads well below collapse levels has created the need for material models for the geosynthetic and geosynthetic-soil interaction accounting for stiffness, yielding and strength properties. A direction dependent isotropic hardening, elastic-plastic-creep model for the geosynthetic, an elastic-perfectly plastic direction and normal stress dependent geosynthetic-soil interaction model, and a bounding surface plasticity model for soil material have been used in a finite element model of a geosynthetic pullout test. Predictions from the model have been compared to a series of pullout tests where it is seen that the model provides reasonable predictions of load-displacement pullout behavior. Systematic removal of material model components has shown that geosynthetic creep properties have a noticeable but minor impact on load-displacement predictions, while geosynthetic plasticity properties have a more significant role for load simulations where the material approaches rupture during pullout. Replacement of the bounding surface plasticity model for the soil material with a linear elastic model resulted in no significant differences in predictions.
Finite element modeling of a geosynthetic pullout test
Perkins, S. W. (author) / Edens, M. Q. (author)
2003
Article (Journal)
English
Finite element modeling of a geosynthetic pullout test
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