Numerical evaluation of sample size effect on the stress-strain behavior of geotextile-reinforced sand
- 163 Downloads
This paper studies the effect of sample size on the stress-strain behavior and strength characteristics of geotextile reinforced sand using the finite element numerical analysis. The effect of sample size was investigated by studying the effects of varying the number of geotextile layers, the confining pressure and the type of geotextile. Modeling was performed on samples with five different diameters: 38, 100, 200, 500 and 600 mm. The elastic-plastic Mohr-Coulomb model was used to simulate sand behavior. Results showed that small-sized samples show higher values of peak strength and higher axial strain at failure in comparison with large-sized samples. The size effect on the behavior of samples became further apparent when the number of geotextile layers was increased or the confining pressure was decreased. In addition, the results indicated that the magnitude of the size effect on the mechanical behavior of reinforced sand decreases with an increase in the sample size.
Key wordsReinforced sand Geotextile Peak strength Mohr-Coulomb Size effect
Unable to display preview. Download preview PDF.
- Adachi, T., Poorooshasb, H.B., 1988. Mechanics of Orthogonally Reinforced Sand. Proceeding of the International Geotechnical Symposium on Theory and Practice of Earth Reinforcement, p.51–59.Google Scholar
- Broms, B.B., 1977. Triaxial Tests with Fabric-reinforced Soil. Proceedings of the International Conference on the Use of Fabric in Geotechnics, Ecole Nationale des Ponts et Chaussees, Paris, p.129–134.Google Scholar
- Holtz, R.D., 2001. Geosynthetics for Soil Reinforcement. The Ninth Spencer J. Buchanan Lecture, College Station Hilton, TX 77840, p.1–19.Google Scholar
- Holtz, R.D., Tobin, W.R., Burke, W.W., 1982. Creep Characteristics and Stress-strain Behavior of Geotextile Reinforced. Proceeding of the Second International Conference on Geotextiles, Las Vegas, USA, p.805–809.Google Scholar
- Jewell, R.A., 1980. Some Effects of Reinforcement in the Mechanical Behavior of Soils. PhD Thesis, University of Cambridge, UK.Google Scholar
- Jewell, R.A., 1991. Revised Design Charts for Steep Reinforced Slopes Reinforced Embankment-theory and Practice. Thomas Telford, London, p.1–30.Google Scholar
- Nakai, T., 1992. Fundamental Investigation of Behavior of Reinforced Sand by Experimental and Numerical Methods. Proceeding of the Practice, Balkema, Rotterdam, p.135–140.Google Scholar
- Reugger, R., 1986. Geotextile Reinforced Soil Structures. Processing of the Third International Conference on Geotextiles, Vienna, Austria, p.453–458.Google Scholar
- Sawicki, A., Lesiniewska, D., 1992. On Modeling Visco-elastic Behavior of Reinforced Soil. Proceeding of Earth Reinforcement Practice, Balkema, Rotterdam, p.163–166.Google Scholar
- Schmertmann, G.R., Chourey, V.E., Johnson, R.D., Bonaparte, R., 1987. Design Charts for Geogrid Reinforced Soil Slopes. Processing of Geosynthetics, New Orleans, p.108–120.Google Scholar
- Vermeer, P.A., Brinkgreve, R.B.J., 1998. PLAXIS Finite Element Code for Soil and Rock Analysis. Balkema, Rotterdam, Brookfield.Google Scholar