Simulating rate-dependent behavior of geogrid-reinforced sands by FEM
Conference proceedings article
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Author list: Li F.-L., Peng F.-L., Tan Y., Kongkitkul W.
Publication year: 2010
Issue number: 199
Start page: 2591
End page: 2600
Number of pages: 10
ISBN: 9780784410950
ISSN: 0895-0563
eISSN: 0895-0563
Languages: English-Great Britain (EN-GB)
Abstract
A nonlinear finite element method (FEM) analysis technique incorporating the non-linear three-component elasto-viscoplastic constitutive models for both sands and polymer geogrids is developed. The model can describe the viscous effects on the stress-strain or tensile load-strain behavior observed in a series of comprehensive laboratory tests on clean sands or geogrids. The dynamic relaxation technique combined with the return mapping algorithm is applied to the integration algorithms of viscoplastic constitutive relations, including the effects of loading rate, stress path and shear band. A series of plane strain compression (PSC) tests performed on geogrid-reinforced sands were simulated by the FEM. The simulated average stress ratio and vertical strain relations of geogrid-reinforced sands were compared with the measurements. It is shown that the developed FEM analysis method can simulate the test results very well, especially for loading rate effects, creep and stress relaxation. ฉ 2010 ASCE.
Keywords
Polymer, Sand, Soil type
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