Study on Cyclic Shear Properties of Siliceous Sand–Steel Interface under Different Normal Loading Conditions

Ma, Yongming; Guo, Jukun; Wang, Rui; Zhang, Qingyao; Zhang, Qingxin; Li, Jin; Zuo, Shen

doi:10.3390/buildings13092241

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…19,20 Numerous factors influence the properties of the sand-concrete interface, such as stress level, particle shape, particle size, initial relative density, and temperature. 21,22 Surface roughness serves as a crucial indicator and is typically defined by parameters such as peakvalley distance (𝑅), average roughness (𝑅 a ), or standardized roughness (𝑅 n = 𝑅 max ∕𝑑 50 ). 23,24 However, these parameters are primarily applied to regular surfaces while engineering practice often deals with surfaces that possess irregular shapes.…”

Section: Introductionmentioning

confidence: 99%

Analyzing cyclic shear behavior at the sand–rough concrete interface: An experimental and DEM study across varying displacement amplitudes

Zhang,

Liu,

Zeng

et al. 2024

Num Anal Meth Geomechanics

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Pile foundations frequently endure dynamic loads, necessitating an in‐depth examination of the cyclic shear properties at the pile–soil interface. This study involved a series of cyclic direct shear (CDS) tests conducted on sand and concrete with irregular surface, utilizing varying displacement amplitudes (1, 3, 6, and 10 mm) and joint roughness coefficients (0.4, 5.8, 9.5, 12.8, and 16.7). Discrete Element Method (DEM) models, informed by experimental data, facilitated mesoscopic mechanical response analyses. Findings indicate that the sand–concrete interface undergoes softening, with hysteresis loops' morphology dependent largely on displacement amplitude. A maximum ultimate shear stress corresponds to a specific critical surface roughness, while the initial tangent modulus escalates with increased concrete roughness. Volume variations of the specimen inversely correlate with displacement amplitude and directly with surface roughness. As displacement amplitude expands, there is a reduction in the maximum shear stiffness and an elevation in the maximum damping ratio. Empirical formulas for the surface roughness and normalized shear stiffness were proposed. Larger displacement amplitudes result in more substantial shear bands and heightened energy dissipation, yet the incremental energy ratio remains largely unaffected. Predominant energy dissipation mechanisms include both slip and rolling slip, with the former surpassing the latter in energy dissipation capacity. The anisotropy directions of contact normal, normal contact forces, and tangential contact forces consistently fluctuate with shear direction alterations.

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Section: Introductionmentioning

confidence: 99%

Analyzing cyclic shear behavior at the sand–rough concrete interface: An experimental and DEM study across varying displacement amplitudes

Zhang,

Liu,

Zeng

et al. 2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

Consideration of Different Soil Properties and Roughness in Shear Characteristics of Concrete–Soil Interface

Wang,

Ni,

Hou

et al. 2024

Buildings

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To investigate the impact of diverse soil characteristics and surface irregularities on interfacial shear strength attributes, a large-scale straight shear apparatus and particle flow software were employed to conduct interfacial shear experiments with varying soil properties and surface irregularities. The results demonstrated that, under an identical R and normal stress conditions, the clay and silty clay shear stress–displacement curves exhibited strain softening, while the silt curve exhibited strain hardening. An increase in R can markedly enhance the peak shear strength at the interface, although a critical value exists beyond which this effect is no longer observed. The Rc is primarily contingent upon the soil properties. Numerical simulations demonstrate that the internal shear displacement and deformation resulting from the diverse soil properties are distinct. Clay particles are constituted of varying-sized particle aggregates that collectively resist shear. Silt particles resist shear through interfacial friction generated by shear. The practicality of Duncan and Clough’s constitutive model for interfacial shear with roughness influence is verified, and the constitutive model under strain hardening is modified.

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Study on Cyclic Shear Properties of Siliceous Sand–Steel Interface under Different Normal Loading Conditions

Cited by 2 publications

References 35 publications

Analyzing cyclic shear behavior at the sand–rough concrete interface: An experimental and DEM study across varying displacement amplitudes

Analyzing cyclic shear behavior at the sand–rough concrete interface: An experimental and DEM study across varying displacement amplitudes

Consideration of Different Soil Properties and Roughness in Shear Characteristics of Concrete–Soil Interface

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