文献类型：期刊文献

英文题名：Characterization of Strong Contact Network in Gap-Graded Granular Soils

作者：Shi, Xiusong Xu, Mengtang He, Zihao Liu, Jiaying Xu, Jin

第一作者：Shi, Xiusong

通信作者：Liu, JY[1];Liu, JY[2]

机构：[1]Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen 518060, Peoples R China;[2]Chinas Cold Pole Cold Resources Technol Innovat Ct, Genhe 022350, Peoples R China;[3]Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Peoples R China;[4]Guizhou Inst Technol, Coll Min Engn, Guiyang 550003, Peoples R China;[5]Hangzhou City Univ, Sch Engn, Hangzhou 310015, Peoples R China;[6]Hangzhou City Univ, Zhejiang Engn Res Ctr Intelligent Urban Infrastruc, Hangzhou 310015, Peoples R China

第一机构：Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen 518060, Peoples R China

通信机构：corresponding author), Hangzhou City Univ, Sch Engn, Hangzhou 310015, Peoples R China;corresponding author), Hangzhou City Univ, Zhejiang Engn Res Ctr Intelligent Urban Infrastruc, Hangzhou 310015, Peoples R China.

年份：2025

卷号：151

期号：12

外文期刊名：JOURNAL OF ENGINEERING MECHANICS

收录：;EI(收录号：20254219342489);Scopus(收录号：2-s2.0-105018745525);WOS:【SCI-EXPANDED(收录号:WOS:001594082800010)】；

基金：This study was partially supported by the National Natural Science Foundation of China under Grant Nos. 52278346, 12272334, and 52104123.

语种：英文

外文关键词：Gap-graded granular material; Initial stress anisotropy; Coarse fraction; Particle size ratio; Strong contact network; Largest cluster

摘要：Gap-graded granular soils are used as construction materials worldwide. However, the evolution of contact network during loading process remains to be further investigated due to their heterogeneous fabric structure. The anisotropic consolidation tests and further triaxial compression tests are performed on gap-graded mixture samples by the discrete-element method (DEM), and the complex network analysis approach is utilized to describe the evolution and percolating behaviors of the network structure in granular assemblies. The effects of the initial stress ratio and particle size distribution on the macroscopic properties are analyzed, and the corresponding percolating behaviour of strong contact network is further revealed based on the complex network analysis. The threshold xi (ratio to the mean contact force), which is the boundary between strong and weak networks, is selected to extract the strong contact network to analyze the percolation behavior. The results indicated that the initial stress anisotropy leads to an increase of contact force and the expansion of the strong contact network. The percolation thresholds increase firstly and then decrease with the increase of coarse fraction, but monotonically increase with the rise of particle size ratio. The evolution of the percolation threshold was found to be consistent with those of the macroscopic properties. The inherent relationship between the mesoscopic contact structure and the macroscopic behaviors may provide a reference for modeling the constitutive relationship of gap-graded granular soils from a new perspective.