Geomechanics and Engineering

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Shearing characteristics of slip zone soils and strain localization analysis of a landslide

  • Liu, Dong (MOE Key Laboratory of Disaster Forecast and Control in Engineering, College of Science and Engineering, Jinan University) ;
  • Chen, Xiaoping (MOE Key Laboratory of Disaster Forecast and Control in Engineering, College of Science and Engineering, Jinan University)
  • Received : 2013.01.17
  • Accepted : 2014.09.01
  • Published : 2015.01.25
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Abstract

Based on the Mohr-Coulomb failure criterion, a gradient-dependent plastic model that considers the strain-softening behavior is presented in this study. Both triaxial shear tests on conventional specimen and precut-specimen, which were obtained from an ancient landslide, are performed to plot the post-peak stress-strain entire-process curves. According to the test results of the soil strength, which reduces from peak to residual strength, the Mohr-Coulomb criterion that considers strain-softening under gradient plastic theory is deduced, where strength reduction depends on the hardening parameter and the Laplacian thereof. The validity of the model is evaluated by the simulation of the results of triaxial shear test, and the computed and measured curves are consistent and independent of the adopted mesh. Finally, a progressive failure of the ancient landslide, which was triggered by slide of the toe, is simulated using this model, and the effects of the strain-softening process on the landslide stability are discussed.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

References

  1. Bjerrum, L. (1967), "Progressive failure in slopes of overconsolidated plastic clays and clay shales", J. Soil Mech. Found. Div., 93(5), 1-49.
  2. Brinkgreve, R.B.J. (1994), "Geomaterical models and numerical analysis of softening", Ph.D. Thesis, Delft University, Delft, The Netherlands.
  3. Chen, G. and Baker, G. (2004a), "Incompatible 4-node element for gradient-dependent plasticity", Adv. Struct. Eng., 7(2), 169-178. https://doi.org/10.1260/1369433041211066
  4. Chen, G. and Baker, G. (2004b), "Enhanced approach to consistency in gradient-dependent plasticity", Adv. Struct. Eng., 7(3), 279-284. https://doi.org/10.1260/136943304323213229
  5. Chen, Z., Morgenstern, N.R. and Chan, D.H. (1992), "Progressive failure of the Carsington Dam: a numerical study", Can. Geotech. J., 29(6), 971-988. https://doi.org/10.1139/t92-107
  6. Chen, X.P., Huang, J.W., Ng, C.W.W. and Ma, S.K. (2011a), "Centrifugal model tests on ancient bank landslide", Chinese J. Geotech. Eng., 33(10), 1496-1503.
  7. Chen, X.P., Huang, J.W., Yin, S.H. and Zheng, J.Z. (2011b), "Experimental study of strength property of slip zone soils", Rock Soil Mech., 32(11), 3212-3218.
  8. Chinese National Standard GB 50021-2001 (2001), Code for Investigation of Geotechnical Engineering, Beijing, China. [In Chinese]
  9. Conte, E., Silvestri, F. and Troncone, A. (2010), "Stability analysis of slopes in soils with strain-softening behavior", Comput. Geotech., 37(5), 710-722. https://doi.org/10.1016/j.compgeo.2010.04.010
  10. Conte, E. Donato, A. and Troncone, A. (2013), "Progressive failure analysis of shallow foundations on soils with strain-softening behaviour", Comput. Geotech., 54, 117-124. https://doi.org/10.1016/j.compgeo.2013.07.002
  11. De Brost, R. (1991), "Simulation of strain localization: A reappraisal of the Cosserat contimuum", Eng. Computation., 8(4), 317-332. https://doi.org/10.1108/eb023842
  12. De Brost, R. (1992), "Gradient-dependent plasticity: formulation and algorithmic aspects", Int. J. Numer. Method. Eng., 35(3), 521-539. https://doi.org/10.1002/nme.1620350307
  13. De Brost, R, and Sluys, L.J. (1991), "Localization in a Cosserat continuum under static and dynamic loading conditions", Comput. Method. Appl. Mech. Eng., 90(1), 805-827. https://doi.org/10.1016/0045-7825(91)90185-9
  14. De Brost, R. and Pamin, J. (1996), "Some novel development in finite element procedures for gradient-dependent plasticity", Int. J. Numer. Method. Eng., 39(14), 2477-2505. https://doi.org/10.1002/(SICI)1097-0207(19960730)39:14<2477::AID-NME962>3.0.CO;2-E
  15. Di Prisco, C. and Imposimato, S. (2003), "Non local numerical analysis of strain localization in dense sand", Mathematical and computer modeling, 37(5), 497-506. https://doi.org/10.1016/S0895-7177(03)00042-6
  16. Di Prisco, C., Imposimato, S. and Aifantis, E.C. (2002), "A visco-plastic constitutive model for granular soils modified according to non-local and gradient approaches", Int. J. Numer. Anal. Method. Geomech., 37(5), 497-506.
  17. Dounias, G.T., Potts, D.M., and Vaughan, P.R. (1988), "Finite element analysis of progressive failure", Comput. Geotech., 6, 155-175. https://doi.org/10.1016/0266-352X(88)90078-X
  18. Georiadis, K., Potts, D.M. and Zdravkovic, L. (2004), "Modelling the shear strength of soils in the general stress space", Comput. Geotech., 31(5), 357-364. https://doi.org/10.1016/j.compgeo.2004.05.002
  19. Han, J., Li, S.C., Li, S.C. and Yang, W.M. (2013), "A procedure of strain-softening model for elasto-plastic analysis of a circular opening considering elasto-plastic coupling", Tunn. Undergr. Sp. Tech., 37, 128-134. https://doi.org/10.1016/j.tust.2013.04.001
  20. Hibbitt, K. (2003), "Getting strated with ABAQUS Version 6.4", ANAQUS Inc.
  21. Lars, P.M. and Stergios, G. (2009), "Suppressed plastic deformation at blunt crack-tips due to strain gradient effects", Int. J. Solid. Struct., 46(25-26), 4430-4436. https://doi.org/10.1016/j.ijsolstr.2009.09.001
  22. Lu, Y. and Yang, W. (2013), "Analytical solutions of stress and displacement in strain softening rock mass around a newly formed cavity", J. Cent. South Univ. T., 20(5), 1397-1404. https://doi.org/10.1007/s11771-013-1627-3
  23. Mohammadi, S. and Taiebat, H.A. (2013), "A large deformation analysis for the assessment of failure induced deformations of slopes in strain softening materials", Comput. Geotech., 49, 279-288. https://doi.org/10.1016/j.compgeo.2012.08.006
  24. Pietruszczak, S.T. and Mroz, Z. (1981), "Finite element analysis of deformation of strain-softening materials", Int. J. Numer. Method. Eng., 17, 327-334. https://doi.org/10.1002/nme.1620170303
  25. Potts, D.M., Dounias, G.T. and Vaughan, P.R. (1990), "Finite element analysis of progressive failure of Carsington embankment", Geotechnique, 40(1), 79-101. https://doi.org/10.1680/geot.1990.40.1.79
  26. Simo, J.C. and Oliver, E.T. (1993), "An analysis of strong discontinuities indeuced by strain-softening in rate-independent inelastic solids", Comput. Mech., 12(5), 277-296. https://doi.org/10.1007/BF00372173
  27. Skempton, A.W. (1964), "Long term stability of clay slopes", Geotechnique, 14(2), 77-101. https://doi.org/10.1680/geot.1964.14.2.77
  28. Troncone, A. (2005), "Numrical analysis of a landslide in soils with strain-softening behavior", Geotechnique, 55(8), 585-596. https://doi.org/10.1680/geot.2005.55.8.585
  29. Wang, Z.M., Zhu, X.A., Tsai, C.T., Tham, C.L. and Beraun, J.E. (2004), "Hybrid-conventional finite element for gradient-dependent plasticity", Finite Elem. Anal. Des., 40(15), 2085-2100. https://doi.org/10.1016/j.finel.2004.02.006

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