Effects of transverse members on geogrid pullout behavior considering rigid and flexible top boundaries |
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| Affiliation: | 1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;1. Cochin University of Science and Technology, Department of Civil Engineering, Kochi 682022, India;2. Carmel College of Engineering and Technology, Department of Civil Engineering, Alappuzha 688004, India;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, China;2. Centre for Ports and Maritime Safety, Dalian Maritime University, Dalian, China;1. Department of Civil Engineering, National Central University, Jhongli, Taiwan, ROC;2. Department of Mass Rapid Transit, Sinotech Engineering Consultant, Ltd, Taipei, Taiwan, ROC;1. VNU Key Laboratory of Geo-environment and Climate Change Response, University of Science, Vietnam National University, Hanoi, Viet Nam;2. Faculty of Advanced Science and Technology, Kumamoto University, Japan;3. Vietnam Japan University, Vietnam National University, Hanoi, Viet Nam;4. Faculty of Geology, University of Science, Vietnam National University, Hanoi, Viet Nam;1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China;2. MOE Key Laboratory of Deep Earth Science and Engineering, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610065, China;1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, China;2. Engineering Research Center of Urban Underground Space Development of Zhejiang Province, Hangzhou, 310058, China;3. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Institute of Geotechnical Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China;4. Zhejiang Institute of Hydraulics & Estuary, Zhejiang Institute of Marine Planning and Design, Hangzhou, 310058, China |
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| Abstract: | Geogrid pullout tests have been regarded as the most direct and effective way to describe the interfacial behavior between geogrid and soil. To investigate the coupled effects of geogrid transverse members and top-loading boundaries on the geogrid-soil interaction, numerical simulations of geogrid pullout tests using the Discrete Element Method (DEM) were carried out in this study. The rigid top boundary was simulated by a rigid wall, while the flexible top boundary was modeled with a string of bonded particles that could rotate and move up and down freely. The coupled effects of geogrid transverse members and top boundary conditions on the geogrid-soil interaction under pullout loads were visualized not only by the force distributions along the geogrids and in the specimens but also by the displacements of soil particles and geogrids. Additionally, the quantitative geogrid force and strain distributions along the geogrids, the lateral force distributions on the front walls, and the vertical displacements of top boundaries also showed the influence of transverse members on the geogrid pullout behavior considering the rigid and flexible top boundaries. The DEM investigation results of this study may provide helpful guidelines for regulating the geogrid pullout test apparatus and methods. |
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| Keywords: | Geosynthetics Geogrid–soil interaction Pullout load Transverse member Boundary condition Discrete element method (DEM) |
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