DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils

Jian Gong; Xiang Wang; Liang Li; Zhihong Nie

doi:10.1016/j.compgeo.2019.04.008

DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils

Jian Gong, Xiang Wang, Liang Li, Zhihong Nie

Research output: Journal article publication › Journal article › Academic research › peer-review

49 Citations (Scopus)

Abstract

This letter examines the effect of fines content on the small-strain stiffness (G₀) of gap-graded soils via the discrete element method (DEM). The G₀ values were obtained by DEM simulations of drained triaxial tests. Microscopic analysis reveals that the G₀ uniquely depends on the mechanical coordination number (CN) of the soils. Furthermore, modified CNs that consider coarse-coarse, coarse-fine and fine-fine contact in the sample are quantified, partially reflecting the contribution of each contact type to G₀. The results indicate that as fines content increases, the fines begin to participate in the force chains and their contribution to G₀ should be considered.

Original language	English
Pages (from-to)	35-40
Number of pages	6
Journal	Computers and Geotechnics
Volume	112
DOIs	https://doi.org/10.1016/j.compgeo.2019.04.008
Publication status	Published - Aug 2019
Externally published	Yes

Keywords

Binary mixtures
DEM
Fines content
Fundamental mechanism
Gap-graded soils
Small-strain stiffness
Triaxial tests

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

More information

10.1016/j.compgeo.2019.04.008

Cite this

@article{ffe8a29c334b4772b57a6f700fed2a9f,

title = "DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils",

abstract = "This letter examines the effect of fines content on the small-strain stiffness (G0) of gap-graded soils via the discrete element method (DEM). The G0 values were obtained by DEM simulations of drained triaxial tests. Microscopic analysis reveals that the G0 uniquely depends on the mechanical coordination number (CN) of the soils. Furthermore, modified CNs that consider coarse-coarse, coarse-fine and fine-fine contact in the sample are quantified, partially reflecting the contribution of each contact type to G0. The results indicate that as fines content increases, the fines begin to participate in the force chains and their contribution to G0 should be considered.",

keywords = "Binary mixtures, DEM, Fines content, Fundamental mechanism, Gap-graded soils, Small-strain stiffness, Triaxial tests",

author = "Jian Gong and Xiang Wang and Liang Li and Zhihong Nie",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = aug,

doi = "10.1016/j.compgeo.2019.04.008",

language = "English",

volume = "112",

pages = "35--40",

journal = "Computers and Geotechnics",

issn = "0266-352X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils

AU - Gong, Jian

AU - Wang, Xiang

AU - Li, Liang

AU - Nie, Zhihong

PY - 2019/8

Y1 - 2019/8

N2 - This letter examines the effect of fines content on the small-strain stiffness (G0) of gap-graded soils via the discrete element method (DEM). The G0 values were obtained by DEM simulations of drained triaxial tests. Microscopic analysis reveals that the G0 uniquely depends on the mechanical coordination number (CN) of the soils. Furthermore, modified CNs that consider coarse-coarse, coarse-fine and fine-fine contact in the sample are quantified, partially reflecting the contribution of each contact type to G0. The results indicate that as fines content increases, the fines begin to participate in the force chains and their contribution to G0 should be considered.

AB - This letter examines the effect of fines content on the small-strain stiffness (G0) of gap-graded soils via the discrete element method (DEM). The G0 values were obtained by DEM simulations of drained triaxial tests. Microscopic analysis reveals that the G0 uniquely depends on the mechanical coordination number (CN) of the soils. Furthermore, modified CNs that consider coarse-coarse, coarse-fine and fine-fine contact in the sample are quantified, partially reflecting the contribution of each contact type to G0. The results indicate that as fines content increases, the fines begin to participate in the force chains and their contribution to G0 should be considered.

KW - Binary mixtures

KW - DEM

KW - Fines content

KW - Fundamental mechanism

KW - Gap-graded soils

KW - Small-strain stiffness

KW - Triaxial tests

UR - http://www.scopus.com/inward/record.url?scp=85064200244&partnerID=8YFLogxK

U2 - 10.1016/j.compgeo.2019.04.008

DO - 10.1016/j.compgeo.2019.04.008

M3 - Journal article

AN - SCOPUS:85064200244

SN - 0266-352X

VL - 112

SP - 35

EP - 40

JO - Computers and Geotechnics

JF - Computers and Geotechnics

ER -

DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils

Abstract

Keywords

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this