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作者:

Wu, Wenan (Wu, Wenan.) | Yang, Yongtao (Yang, Yongtao.) | Zheng, Hong (Zheng, Hong.) | Wang, Shuqing (Wang, Shuqing.) | Zhang, Ning (Zhang, Ning.) | Wang, Yichen (Wang, Yichen.)

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EI Scopus SCIE

摘要:

This study focuses on determination of the effective hydro-mechanical properties of a widespread geological me ' lange, the Soil-Rock Mixture (SRM), using the multiscale Numerical Manifold Method (NMM). Influences of the Volumetric Block Proportion (VBP), block size, block shape, block orientation angle and micro-dynamics on the effective properties are investigated thoroughly. The SRM structural models are generated within the NMM framework in a statistical manner. The effective properties are extracted using the multiscale theory where micro-dynamics is fully considered based on the extended Hill-Mandel lemma. Through numerical simulations, the VBP and block orientation angle prove to be the first and second most influential factors. A growing VBP leads to increasing deformation moduli but decreasing effective permeability and Biot's factor. Normal com-ponents of permeability and deformation tensors are positively proportional to the corresponding normal intersecting areas formed by sample cross-sections and blocks while shear components are positively propor-tional to sums of the normal and shear intersecting areas. Introducing micro-dynamics and diminishing the time step make the effective permeability and deformation moduli rise while Biot's coefficient decrease. The accuracy and stability of the multiscale NMM are validated by comparing present results with those of empirical formulae and single-scale numerical methods.

关键词:

Effective hydro-mechanical properties Soil-Rock Mixtures (SRMs) Numerical Manifold Method (NMM) Multiscale theory

作者机构:

  • [ 1 ] [Wu, Wenan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Zheng, Hong]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Shuqing]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Ning]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Yichen]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 6 ] [Yang, Yongtao]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China

通讯作者信息:

  • [Yang, Yongtao]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China;;

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来源 :

COMPUTERS AND GEOTECHNICS

ISSN: 0266-352X

年份: 2022

卷: 155

5 . 3

JCR@2022

5 . 3 0 0

JCR@2022

ESI学科: COMPUTER SCIENCE;

ESI高被引阀值:46

JCR分区:1

中科院分区:1

被引次数:

WoS核心集被引频次: 13

SCOPUS被引频次: 16

ESI高被引论文在榜: 0 展开所有

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