Discrete Element Modeling of Soil-Geogrid Interactions
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Date
2019-01-23
Authors
Irsainova, Alina
Journal Title
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Publisher
Nazarbayev University School of Engineering and Digital Sciences
Abstract
Geogrids are the geosynthetics of choice for soil reinforcement
applications. To evaluate the efficiency of geogrid reinforcement, several
methods are used including field tests, laboratory tests, and numerical modeling.
Field studies consume a long period of time and conducting these investigations
may become highly expensive because of the need for real-size structures.
Laboratory studies present also significant difficulties: large-size testing
machines are required to accommodate realistic geogrid designs. The discrete
element method (DEM) may be used as a complementary tool to extend physical
testing databases at a lower cost. Discrete element models do not require
complex constitutive formulations and may be fed with particle scale data (size,
strength, shape) thus reducing the number of free calibration parameters. The
thesis reviews the different approaches followed to model soil-geogrid
interaction in DEM and presents preliminary results from pull-out and triaxial
conditions. Moreover, a numerical model of triaxial test with or without geogrid
was developed and validated by laboratory test values that were provided by
other researchers.
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Citation
Irsainova, Alina (2019) Discrete Element Modeling of Soil-Geogrid Interactions. Nazarbayev University School of Engineering