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Effects of particle sphericity and initial fabric on the shearing behavior of soil–rough structural interface
Wan-Huan Zhou1,2; Xue-Ying Jing1; Zhen-Yu Yin3; Xueyu Geng4
2019-02-11
Source PublicationActa Geotechnica
ISSN1861-1125
Volume14Pages:1699-1716
Abstract

In this study, the effects of particle sphericity and initial fabric on the shearing behavior of soil-structural interface were analyzed by discrete element method (DEM). Three types of clustered particles were designed to represent irregular particles featuring various sphericities. The extreme porosities of granular materials composed of various clustered particles were affected by particle sphericity. Moreover, five specimens consisting of differently oriented particles were prepared to study the effect of initial fabric. A series of interface shear tests featuring varying interface roughnesses were carried out using three-dimensional (3D) DEM simulations. The macro-response showed that the shear strength of the interface increased as particle sphericity decreased, while stress softening and dilatancy were easily observed during the shearing. From the particle-scale analysis, it was found that the thickness of the localized band was affected by the interface roughness, the normal stress and the initial fabric while independent of the particle sphericity. The thickness generally ranged between 4 and 6 times that of the median particle equivalent diameter. A thicker localized band was formed in the case of rougher interface and in soil composed of inclined placed and randomly placed particles. The coordination number measured in the interface zone and upper zone suggested that the dilation mostly occurs inside the interface zone. Anisotropy was induced by the interface shearing of the initial isotropic specimens. The direction of shear-induced anisotropy correlates with the shearing direction. The evolutions of anisotropies for the anisotropic specimens depend on the initial fabric.

KeywordDiscrete Element Method Initial Fabric Interface Roughness Particle Sphericity Effect Soil-structural Interface
DOI10.1007/s11440-019-00781-2
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Geological
WOS IDWOS:000497282200007
PublisherSPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Scopus ID2-s2.0-85061400759
Fulltext Access
FWCI4.3908696
Citation statistics
Cited Times [WOS]:51   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Affiliation1.Department of Civil and Environmental Engineering,Faculty of Science and Technology,University of Macau,Macau,China
2.Zhuhai UM Science and Technology Research Institute,Zhuhai,China
3.Department of Civil and Environmental Engineering,Hong Kong Polytechnic University,Hung Hom, Kowloon,Hong Kong
4.Geotechnical Engineering School of Engineering (F332),The University of Warwick,Coventry,CV4 7AL,United Kingdom
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Wan-Huan Zhou,Xue-Ying Jing,Zhen-Yu Yin,et al. Effects of particle sphericity and initial fabric on the shearing behavior of soil–rough structural interface[J]. Acta Geotechnica,2019,14:1699-1716.
APA Wan-Huan Zhou,Xue-Ying Jing,Zhen-Yu Yin,&Xueyu Geng.(2019).Effects of particle sphericity and initial fabric on the shearing behavior of soil–rough structural interface.Acta Geotechnica,14,1699-1716.
MLA Wan-Huan Zhou,et al."Effects of particle sphericity and initial fabric on the shearing behavior of soil–rough structural interface".Acta Geotechnica 14(2019):1699-1716.
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