Three-dimensional numerical modeling of single geocell-reinforced sand |
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Authors: | Xiaoming Yang Jie Han Robert L Parsons and Dov Leshchinsky |
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Affiliation: | (1) Department of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India;(2) Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India;(3) Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, 600036, India |
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Abstract: | This paper summarizes the development of a three-dimensional numerical model for analyzing single geocell-reinforced soil.
In this model, the infill soil was modeled using the Duncan-Chang model, which can simulate non-linearity and stress-dependency
of soil. Geocell was modeled using linearly elastic plate elements, which can carry both bending and membrane stresses. A
linear interface stress-strain relationship with a Mohr-Coulomb yield criterion was adopted to model the interface friction
between the geocell wall and the soil. By modeling the geocell and the soil separately, the interaction between the soil and
the geocell can be accurately simulated. To verify this model, a plate load test was conducted in the laboratory, in which
a 12-cm-thick sand layer reinforced by a single geocell was subjected to a vertical load from a circular steel plate. The
load-displacement curves and the horizontal tensile strain of the geocell were recorded during the test. A numerical model
was created according to the setup of the load test. The numerical results compared reasonably well with the test data. |
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