Two-dimensional DEM analysis of behavior of geogrid-reinforced uniform granular bases under a vertical cyclic load

Bhandari, Anil; Han, Jie; Parsons, Robert L.

doi:10.1007/s11440-013-0299-3

Cited by 26 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the finite element method provides reasonable predictions for geostructures with geosynthetic reinforcements in planar forms, numerous GRS-related works are conducted using the DEM. The majority of these works attempt to explore the reinforcement mechanisms of the GRS designed in various forms and shapes from a micromechanics perspective (Lai et al, 2014;Ngo et al, 2015;Bhandari et al, 2015;Wang et al, 2016).…”

Section: Dem Analysis Of Geotextile-wrapped Soilmentioning

confidence: 99%

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Cheng

Yamamoto

Thoeni

et al. 2017

Geotextiles and Geomembranes

View full text Add to dashboard Cite

This paper presents a novel analytical solution for geotextile-wrapped soil based on a comprehensive numerical analysis conducted using the discrete element method (DEM). By examining the soil-geotextile interface friction, principal stress distribution, and stress-strain relations of the constituent soil and geotextile in the DEM analysis, a complete picture of the mechanical characterization of geotextile-wrapped soil under uniaxial compression is first provided. With these new insights, key assumptions are verified and developed for the proposed analytical solution. In the DEM analysis, a near-failure state line that predicts stress ratios relative to the maximums at failure with respect to deviatoric strain is uniquely identified; dilation rates are found to be related to stress ratios via a single linear correlation regardless of the tensile stiffness of the geotextile. From these new findings, the assumptions on the stress-state evolution and the stress-dilatancy relation are developed accordingly, and the wrapped granular soil can therefore be modeled as a Mohr-Coulomb elastoplastic solid with evolving stress ratio and dilation rate. The development of the proposed analytical model also demonstrates an innovative approach to take advantage of multiscale insights for the analytical modeling of complex geomaterials. The analytical model is validated with the DEM simulation results of geotextile-wrapped soil under uniaxial compression, considering a wide range of geotextile tensile stiffnesses. To further examine the predictive capacity of the analytical model, the stress-strain response under triaxial compression conditions is solved analytically, taking both different confining pressures and geotextile tensile stiffnesses into account. Good agreement is obtained between the analytical and DEM solutions, which suggests that the key assumptions developed in the uniaxial compression conditions also remain valid for triaxial compression conditions.

show abstract

Section: Dem Analysis Of Geotextile-wrapped Soilmentioning

confidence: 99%

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Cheng

Yamamoto

Thoeni

et al. 2017

Geotextiles and Geomembranes

View full text Add to dashboard Cite

show abstract

“…For geosynthetic stabilized roadways, traffic load creates a spreading motion of the aggregate, which causes tension in all directions in geosynthetics by the shear interaction between the aggregate and geosynthetics (Perkins et al, 2011;Wang et al, 2014;Bhandari et al, 2015). When subjected to tension in all directions, multi-axial geogrids exhibit more uniform stresses and strain distributions over traditional biaxial geogrids because biaxial geogrids have the tensile stiffness predominantly in two directions whereas multi-axial geogrids have a better ability to distribute the load through 360 with an additional principal direction of stiffness (Dong et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Radial stresses and resilient deformations of geogrid-stabilized unpaved roads under cyclic plate loading tests

Sun

Han

Kwon³

et al. 2015

Geotextiles and Geomembranes

Self Cite

View full text Add to dashboard Cite

“…The distribution of displacement field, stress field and tensile force of reinforcement in the foundation are obtained and analyzed. [14] Finite element -Square -Lee et al [70] Finite element PLAXIS 2D Strip Geotextile Basudhar et al [5] Finite difference FLAC 2D Circular Geotextile Laman and Yildiz [13] Finite element PLAXIS 2D Ring Geogrid Deb et al [18] Finite difference FLAC 2D Strip -Basudhar et al [71] Finite element -Strip Geotextile Ghazavi and Lavasan [72] Finite difference FLAC 3D Square Planar geosynthetic Latha and Somwanshi [10] Finite difference FLAC 3D Square Geogrid, Geonet Latha and Somwanshi [42] Finite difference FLAC 3D Square Geogrid, Geonet Zidan [73] Finite element PLAXIS 2D Circular Geogrid Chakraborty and Kumar [74] Finite element -Circular Geogrid Demir et al [15] Finite element PLAXIS 3D Circular Geogrid Naderi and Hataf [16] Finite element PLAXIS 3D Circular, Ring Geogrid Noorzad and Manavirad [75] Finite element PLAXIS 2D Strip Geotextile Bhandari et al [22] Discrete element PFC 2D -Geogrid Kazi et al [76] Finite element PLAXIS 2D Strip Geotextile Şadoğlu [77] Finite element PLAXIS 2D Strip Geotextile Tran et al [78] Finite element Discrete element…”

Section: Finite Element and Finite Difference Modellingsmentioning

confidence: 99%

“…The particle flow code software PFC 2D or 3D is used to simulate reinforced foundations [21,23,24]. In the two-dimensional numerical model, the spherical particles are bonded together to simulate the horizontal reinforcement [22], while in the three-dimensional numerical model, a large number of spherical particles are bonded to model the geometry of the geogrid [23]. The spherical particles with different sizes are used to simulate different types of soil or several particles are combined to simulate different shapes of foundation soil (e.g., angular gravel).…”

Section: Discrete Element Modellingsmentioning

confidence: 99%

“…In addition to experimental studies, numerical modellings were used to validate the results of model tests and investigate the effect of various influencing factors on the performance of GRS foundations. Currently, the numerical analysis methods consist of finite element method [14][15][16][17], finite difference method [18][19][20], and discrete element method [21][22][23][24]. Based on the results of experimental and numerical studies, some researchers have proposed the analytical solutions to calculate the bearing capacity of reinforced foundation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Planar geosynthetic-reinforced soil foundations: a review

2020

View full text Add to dashboard Cite

Geosynthetics-reinforced soil (GRS) foundation can improve the bearing capacity of the foundation and reduce the settlement of the footing, which has been widely applied to the treatment and improvement of soft soil foundation. In recent years, scholars have carried out a large number of studies to reveal the influence of different factors on the load and settlement behaviors of GRS foundations. In this study, the reinforcing mechanisms of reinforced materials are first summarized, and then the literature review of planar geosynthetic-reinforced foundations from the aspects of experimental studies, numerical simulations and theoretical analyses are presented. Finally, the current research trend of reinforced foundation and the prospects in the future study are discussed. Although the researches on the performance of GRS foundations are conducted extensively, there is no unified understanding on the failure mode and reinforcing mechanism of reinforced foundation. It is necessary to propose the accurate and simple calculation method to evaluate the ultimate bearing capacity of reinforced foundations based on the reinforcing mechanism and failure mode. In addition, the dynamic response of GRS foundations under cyclic loading and earthquake needs to be studied intensively. The paper summarizes the past and present developments of the GRS foundations and provide the views for the further researches.

show abstract

Two-dimensional DEM analysis of behavior of geogrid-reinforced uniform granular bases under a vertical cyclic load

Cited by 26 publications

References 28 publications

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Radial stresses and resilient deformations of geogrid-stabilized unpaved roads under cyclic plate loading tests

Planar geosynthetic-reinforced soil foundations: a review

Contact Info

Product

Resources

About