Numerical Modeling of Direct Shear Tests on Sandy Clay

Authors: R. Ziaie Moayed , S. Tamassoki , E. Izadi

Abstract:

Investigation of sandy clay behavior is important since urban development demands mean that sandy clay areas are increasingly encountered, especially for transportation infrastructures. This paper presents the results of the finite element analysis of the direct shear test (under three vertical loading 44, 96 and 192 kPa) and discusses the effects of different parameters such as cohesion, friction angle and Young's modulus on the shear strength of sandy clay. The numerical model was calibrated against the experimental results of large-scale direct shear tests. The results have shown that the shear strength was increased with increase in friction angle and cohesion. However, the shear strength was not influenced by raising the friction angle at normal stress of 44 kPa. Also, the effect of different young's modulus factors on stress-strain curve was investigated.

Keywords: Shear strength, Finite element analysis, Large direct shear test, Sandy clay.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073050

References:

[1] A. Iizuka, K. Kawai, , E.R. Kim, and M. Hirata, "Modeling of the confining effect due to the geosynthetic wrapping of compacted soil specimens," Geotextiles and Geomembranes, vol. 22, pp. 329-358, 2004.
[2] A. Bagherzadeh-Khalkhali, A. Asghar Mirghasemi, "Numerical and experimental direct shear tests for coarse-grained soils," Particuology, vol. 7, pp. 83-91, 2009.
[3] E.M. Palmeira, "Soil-geosynthetic interaction: modelling and analysis," Geotextiles and Geomembranes 27, pp. 368-390, 2009.
[4] J. WookPark, J. JoonSong, "Numerical simulation of a direct shear test on a rock joint using a bonded-particlemodel," International Journal of Rock Mechanics & Mining Sciences, vol. 46, pp. 1315-1328, 2009.
[5] JG. Potyondy, "Skin friction between various soils and construction materials," Geotechnique, vol. 4, pp. 339-353, 1961.
[6] H.J. Burd, G.T. Houlsby, "Numerical modeling of reinforced unpaved roads," Proceeding of the Third International Symposium on Numerical Models in Geomechanics, Canada, 1989.
[7] K. Kazimierowicz-Frankowska, "Influence of geosynthetic reinforcement on the load-settlement characteristics of two-layer sub grade," Geotextiles and Geomembranes , vol. 25, pp. 366-376, 2007.
[8] P.K. Anubhav, Basudhar, "Modeling of soil-woven geotextile interface behavior from direct shear test results," Geotextiles and Geomembranes , vol. 28, pp. 403-408, 2010.
[9] R. Ziaie Moayed, M. Kamalzare, "Influence of Geosynthetic Reinforcement on Shear Strength Characteristics of Two-Layer Sub grade," Imam Khomeini International University Department of Engineering, June 2010.
[10] S. Helwany, "Applied Soil Mechanics with ABAQUS Application," Printed in the United States of America, pp. 61-66, 2007.
[11] T. William Lambe, R.V. Whitman, "Soil Mechanics," SI Version, Massachustts Institute of Technology With the assistance of H. G. Poulos University of Sydney, 1928.