Effect of aperture ratio on the cyclic shear behaviour of aggregate-geogrid interfaces

Wang, J.; Liu, F. Y.; Zheng, Qi-Teng; Cai, Yuanqiang; Gou, Changfei

doi:10.1680/jgein.20.00038

Cited by 22 publications

(3 citation statements)

References 32 publications

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“…During this phase, the interfacial residual strength does not undergo significant alterations, and the geogrid-soil interface displays shear-softening characteristics. This result is very similar to the experimental results of Wang et al [25]. The possible cause of this phenomenon is that the value of σ is too high, which exacerbates the deformation and wear of the grid during the shearing process.…”

Section: Methodssupporting

confidence: 91%

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Zhang,

Ruan,

Jiang

2024

Applied Sciences

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This paper presents the results of horizontal cyclic direct shear tests at the reinforced soil interface of a four-way polypropylene geogrid reinforced sandy soil. The influence of normal stress and shear displacement amplitude on the shear stress, shear stiffness, and damping ratio of the reinforced soil interface are evaluated by varying the normal stress and shear displacement amplitude. Dynamic shear characteristics of reinforced soil interface under normal constant load were investigated by using a large dynamic straight shear apparatus. Peak interface strength increases with increasing amplitude of normal stress and shear displacement amplitude. The larger the normal stress and shear displacement amplitude, the fewer cycles are needed to attain peak interface strength. At low-magnitude normal stress levels, the peak shear stress and shear stiffness tend to stabilize after an initial increase during the cycling process, and the damping ratio decreases and then stabilizes with the increase in the number of cycles; whereas when the normal stress level is high, the peak shear stress and shear stiffness increase and then decrease during the cycling process and eventually stabilize, and the damping ratio decreases and then increases and finally stabilizes with the increase in the number of cycles. Moreover, under the same number of cycles, the corresponding shear stiffness decreases with an increase in shear displacement amplitude, while the damping ratio increases.

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Section: Methodssupporting

confidence: 91%

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Zhang,

Ruan,

Jiang

2024

Applied Sciences

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“…Laboratory direct shear test studies have shown that different stress levels and different types of fillers cause great differences and complexities in the shear strengths and deformations of the interface between the reinforcement and the soil [15][16][17]. In a study of RCA applied to reinforced structures, Wang et al [18] showed that adding a geogrid to RCA under repeated loading has a greater impact on the permanent deformation and elastic modulus. Touahaia et al [19] studied the shear strength characteristics of RCA materials and showed that the presence of geosynthetics led to a marked increase in the shear resistance of the material and greatly restricted the deformation of a sample.…”

Section: Introductionmentioning

confidence: 99%

Shear Characteristics of the Interface between Recycled Concrete Aggregates and Various Geosynthetics

Yuan

et al. 2021

Advances in Civil Engineering

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To investigate the interface shear characteristics between various geosynthetics and recycled concrete aggregate (RCA), 30 large-scale monotonic direct shear tests were conducted. The main work was to analyse the effect of a biaxial polypropylene geogrid, a glass fiber geogrid, a warp-knitted polyester geogrid, a woven geotextile, and geonet on the interface shear properties of RCA. The test results show that adding a biaxial polypropylene geogrid or a geonet to RCA can improve its interface shear strength. The inclusion of glass fiber geogrids, warp-knitted polyester geogrids, and woven geotextiles decrease the interface shear strength of RCA. The reinforcing RCA with geosynthetics can effectively suppress its shear dilation, and the change in internal friction angle is consistent with the change law of the material interface enhancement coefficient. Finally, the aperture size of a geogrid has a significant effect on the mechanical properties of the geogrid-RCA interface. The interface shear strength increases first and then decreases with an increase in the ratio between aperture size and median particle diameter. It is concluded that there is an optimal range of aperture ratio between a geogrid and RCA.

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“…In addition, the influence of grain on the shear zones of the interface was also studied by using the finite element software ABAQUS. Wang [25] studied the influence of the aperture ratio (geogrid aperture size/medium grain size) on the mechanical characteristics of the interface. Ghaaowd [26] performed a large-scale pullout trial to explore the interaction between the maximum particle size of tire-derived aggregate (TDA) and geosynthetics and observed combined tensile-pullout failure subjected to higher normal loading.…”

Section: Introductionmentioning

confidence: 99%

Effect of Boundary Conditions on the Mechanical Behavior of the Geogrid–Soil Interface

et al. 2021

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Geogrid-reinforced structures are extensively adopted in various engineering fields. At present, the influence of boundary conditions was not considered in design methods, bringing hidden dangers to the safety of the structure. In the current study, a series of pullout tests were carried out on high-density polyethylene (HDPE) geogrid-reinforced coarse sand. The magnitude and growth pattern of pullout resistance and the variation laws of interfacial shear strength indexes under four types of boundary conditions were analyzed. Additionally, the boundary reduction coefficient (BRC) was introduced to establish the relationship between rigid and flexible boundary for the design of the structure. The tests results showed that the boundary conditions cannot be ignored in the design of structures, especially in the front. When the normal loading was up to 120 kPa, the BRC-top and BRC-positive could be taken as 0.9 and 0.5, respectively, and verified by fitting results. The boundary conditions affected the pullout resistance, while the vertical loading corresponding to the maximum pullout resistance was not related to boundary conditions. Investigating the interaction of the geogrid–soil under different boundary conditions can help to improve the understanding of the behavior of reinforced soil structure, and to achieve a more efficient and economical design.

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Effect of aperture ratio on the cyclic shear behaviour of aggregate-geogrid interfaces

Cited by 22 publications

References 32 publications

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Shear Characteristics of the Interface between Recycled Concrete Aggregates and Various Geosynthetics

Effect of Boundary Conditions on the Mechanical Behavior of the Geogrid–Soil Interface

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