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Three-dimensional numerical modeling of single
geocell-reinforced sand |
| Xiaoming YANG1,Jie HAN1,Robert L. PARSONS1,Dov LESHCHINSKY2, |
| 1.Department of Civil,
Environmental, and Architectural Engineering, the University of Kansas,
Lawrence, KS 55045, USA; 2.Department of Civil and
Environmental Engineering, the University of Delaware, Newark, DE
19719, USA; |
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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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| Keywords
geosynthetic reinforcement
geocell
numerical model
FLAC3D
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Issue Date: 05 June 2010
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