Geomechanics and Engineering

  • 제26권4호
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  • Pages.357-367
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  • 2021
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Influence of a preset fissure on clay behavior under uniaxial compression

  • Wang, Wei (School of Civil Engineering, Nanjing Institute of Technology) ;
  • Zhao, Binghua (School of Civil Engineering, Nanjing Institute of Technology) ;
  • Hu, Aiyu (School of Civil Engineering, Nanjing Institute of Technology) ;
  • Shang, Jibin (School of Civil Engineering, Nanjing Institute of Technology)
  • 투고 : 2020.07.10
  • 심사 : 2021.08.05
  • 발행 : 2021.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Under compression, the flaws in soils will not only weaken the mechanical properties of soils, but also affect the strain localization of soils. In order to study the influence of flaws on the behavior of soils under compression, the uniaxial compression tests of clays with different inclination and position fissures were carried out, and the two-dimensional numerical analysis was also discussed based on the damage plasticity model. Analyzing the results of the uniaxial compression test and simulation of the intact and fissured clays, the following conclusions can be drawn: (1) The 60-degree fissure located on the upper position of the right edge of the clay has the greatest influence on the failure form and damage energy of clays, which can reduce the compression strength by 30% compared with that of the intact clay. (2) The numerical method based on the damage plasticity model can basically simulate the compression behavior of clays containing a pre-existing fissure and reproduce the failure characteristics of clays. (3) The preset fissure has obvious influence on the evolution of maximum principal stress in the area with serious damage, but less on the shear stress. And in the area with slight damage, the effect on the maximum principal stress and shear stress is very weak.

키워드

과제정보

Authors are wishing to acknowledge the financial support from the Science Research Fund of Nanjing Institute of Technology (No. CKJB201310).

참고문헌

  1. Bayesteh, H. and Ghasempour, T. (2019), "Role of the location and size of soluble particles in the mechanical behavior of collapsible granular soil: A DEM simulation", Comput. Part. Mech., 6, 327-341. https://doi.org/10.1007/s40571-018-00216-x.
  2. Borja, R.I. (2004), "Computational modeling of deformation bands in granular media. II. numerical simulations", Comput. Meth. Appl. M., 193(27-29), 2699-2718. https://doi.org/10.1016/j.cma.2003.09.018.
  3. Castelli, M., Allodi, A. and Scavia, C. (2009), "A numerical method for the study of shear band propagation in soft rocks", Int. J. Numer. Anal. Met., 33, 1561-1587. https://doi.org/10.1002/nag.778.
  4. Desrues, J., Chambon, R., Mokni, M., and Mazerolle, F. (1996), "Void ratio evolution inside shear bands in triaxial sand specimens studied by computed tomography", Geotechnique, 46(3), 529-546. http://doi.org/10.1680/geot.1996.46.3.529.
  5. Dong, Q.Q., Xiong, C.W, Ma, C.L. and Wei, H.J. (2019), "Experimental study on cracking behavior of intermittent double S-shaped fissures under uniaxial compression", KSCE J. Civ. Eng., 23(6), 2483-2494. https://doi.org/10.1007/s12205-019-1858-4.
  6. Ebrahimian, B., Noorzad, A. and Alsaleh, M.I. (2018), "Modeling interface shear behavior of granular materials using micro-polar continuum approach", Continuum Mech. Therm., 30, 95-126. https://doi.org/10.1007/s00161-017-0588-4.
  7. Huang, S.B., Yao, N., Ye, Y.C. and Cui, X.Z. (2019), "Strength and failure characteristics of rocklike material containing a largeopening crack under uniaxial compression: Experimental and numerical studies", Int. J. Geomech., 19(8), 04019098. https://doi.org.10.1061/(ASCE)GM.1943-5622.0001477.
  8. Huang, Y.H., Yang, S.Q., Tian, W.L., Zeng, W. and Yu, L.Y. (2016), "An experimental study on fracture mechanical behavior of rock-like materials containing two unparallel fissures under uniaxial compression", Acta Mech. Sin., 32(3), 442-455. https://doi.org/10.1007/s10409-015-0489-3.
  9. Huang, W. X., Huang, L. Y., Sheng, D.C. and Sloan, S. W. (2015), "DEM modelling of shear localization in a plane Couette shear test of granular materials", Acta Geotech., 10, 389-397. https://doi.org/10.1007/s11440-014-0348-6.
  10. Jiang, M. J., Liu, J. and Shen, Z.F. (2018), "Investigating the shear band of methane hydrate-bearing sediments by FEM with an elasto-plastic constitute model", B. Eng. Geol. Environ., 77, 1015-1025. https://doi.org/10.1007/s10064-017-1109-1.
  11. Kozicki, J. and Tejchman, J. (2018), "Relationship between vortex structures and shear localization in 3D granular specimens based on combined DEM and Helmholtz-Hodge decomposition", Granul. Matter, 20, 48. https://doi.org/10.1007/s10035-018-0815-0.
  12. Muhlhaus, H.B. and Alfantis, E.C. (1991), "A variational principle for gradient plasticity", Int. J. Solids Struct., 28(7), 845-857. https://doi.org/10.1016/0020-7683(91)90004-Y.
  13. Schneider-Muntau, B., Chen, C. and Bathaeian, S.M.I. (2017), "Simulation of shear bands with Soft PARticle Code (SPARC) and FE", Int. J. Geomath., 8, 135-151. https://doi-org/10.1007/s13137-016-0091-2.
  14. Vangla, P. and Latha, G.M. (2015), "Influence of particle size on the friction and interfacial shear strength of sands of similar morphology", Int. J. Geosynth. Ground Eng., 1, 6. https://doi-org/10.1007/s40891-014-0008-9.
  15. Wanatowski, D. and Chu, J. (2006), "Stress-strain behavior of a granular fill measured by a new plane strain apparatus", Geotech. Test. J., 29(2), 1-9. https://doi.org/10.1520/GTJ12621.
  16. Wang, B.J., Xiao, H.T. and Yue, Z.Q. (2012), "Interaction between two rectangular cracks in a transversely isotropic medium of semi-infinite extent", Rock Soil Mech., 33(8), 2527-2535. https://doi.org/10.16285/j.rsm.2012.08.001.
  17. Wang, M., Cao, P., Wan, W., Zhao, Y. L., Liu, J. and Liu, J. S. (2017), "Crack growth analysis for rock-like materials with ordered multiple pre-cracks under biaxial compression", J. Cent. South Univ., 24, 866-874. https://doi.org/10.1007/s11771-017-3489-6.
  18. Wang, X., Yuan, W., Yan, Y.T. and Zhang, X. (2020), "Scale effect of mechanical properties of jointed rock mass: A numerical study based on particle flow code", Geomech. Eng., 21(3), 259-268. https://doi.org/10.12989/gae.2020.21.3.259.
  19. Watanabe, Y., Lenoir, N., Otani, J. and Nakai, T. (2012), "Displacement in sand under triaxial compression by tracking soil particles on X-ray CT data", Soils Found., 52(2), 312-320. https://doi.org/10.1016/j.sandf.2012.02.008.
  20. Xu, J. and Li, Z.X. (2017), "Damage evolution and crack propagation in rocks with dual elliptic flaws in compression", Acta Mech. Solida Sin., 30, 573-582. https://doi.org/10.1016/j.camss.2017.11.001.
  21. Yang, S.Q., Jing, H.W. and Xu, T. (2014), "Mechanical behavior and failure analysis of brittle sandstone specimen containing combined flaws under uniaxial compression", J. Cent. South Univ., 21, 2059-2073. https://doi.org/10.1007/s11771-014-2155-5.