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Modeling Geogrid Pullout Behavior in Sand Using Discrete-Element Method and Effect of Tensile Stiffness
Wei-Bin Chen1; Wan-Huan Zhou1,2,3; Xue-Ying Jing1
Source PublicationInternational Journal of Geomechanics

In this study, a series of numerical pullout tests was performed using the discrete-element method (DEM) to investigate the micromechanical behavior of geogrid pullout and the effect of geogrid tensile stiffness. Geogrid-soil interaction during pullout was investigated not only through displacement fields and force chains inside the soil but also via the quantitative displacement and force distributions along the geogrid. The active and inactive zones were defined based on the displacement fields in the soil, and the displacement corresponding to the boundary between the active and inactive zones was found to be 1.25 mm in this study. The higher the geogrid stiffness, the larger was the thickness and length of the active zone mobilized in the soil under the same pullout displacements. The thickness and length for the geogrid with largest tensile stiffness were 150 and 500 mm (full length of geogrid), respectively. Reorientations of contacts and forces within both the inactive and active zones were further visualized based on the Fourier-series approximation. The part of the geogrid that experienced displacement of more than 1.25 mm (used for the definition of the active zone) is defined as the affected part, and its corresponding length is defined as the affected length. The stiffer geogrid was found to activate the affected length into the full range more rapidly than the less stiff one prior to failure. The tensile forces at the load ends of stiff geogrids were larger than those at the load ends of extensible geogrids at all given pullout displacements.

KeywordSoil-structure Interaction Geogrid Tensile Stiffness Discrete-element Method Pullout Behavior
URLView the original
Indexed BySCIE
WOS Research AreaEngineering
WOS SubjectEngineering, Geological
WOS IDWOS:000462449600023
Scopus ID2-s2.0-85061150856
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Cited Times [WOS]:21   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
Corresponding AuthorWan-Huan Zhou
Affiliation1.Dept. of Civil and Environmental Engineering,Univ. of Macau,999078,Macao
2.Univ. of Macau Research Institute,Zhuhai, Guangdong,519080,China
3.State Key Laboratory of Internet of Things for Smart City,Univ. of Macau,999078,Macao
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Wei-Bin Chen,Wan-Huan Zhou,Xue-Ying Jing. Modeling Geogrid Pullout Behavior in Sand Using Discrete-Element Method and Effect of Tensile Stiffness[J]. International Journal of Geomechanics,2019,19(5).
APA Wei-Bin Chen,Wan-Huan Zhou,&Xue-Ying Jing.(2019).Modeling Geogrid Pullout Behavior in Sand Using Discrete-Element Method and Effect of Tensile Stiffness.International Journal of Geomechanics,19(5).
MLA Wei-Bin Chen,et al."Modeling Geogrid Pullout Behavior in Sand Using Discrete-Element Method and Effect of Tensile Stiffness".International Journal of Geomechanics 19.5(2019).
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