Geomechanics and Engineering

  • 제16권5호
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  • Pages.495-501
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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Discrete element modelling of geogrids with square and triangular apertures

  • Chen, Cheng (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • McDowell, Glenn (Nottingham Center for Geomechanics, University of Nottingham) ;
  • Rui, Rui (School of Civil Engineering and Architecture, Wuhan University of Technology)
  • 투고 : 2018.05.22
  • 심사 : 2018.09.13
  • 발행 : 2018.12.10
⟨ 이전 논문 다음 논문 ⟩

초록

Geogrid application that has proved to be an effective and economic method of reinforcing particles, is widely used in geotechnical engineering. The discrete element method (DEM) has been used to investigate the micro mechanics of the geogrid deformation and also the interlocking mechanism that cannot be easily studies in laboratory tests. Two types of realistically shaped geogrid models with square and triangle apertures were developed using parallel bonds in PFC3D. The calibration test simulations have demonstrated that the precisely shaped triangular geogrid model is also able to reproduce the deformation and strength characteristics of geogrids. Moreover, the square and triangular geogrid models were also used in DEM pull-out test simulations with idealized shape particle models for validation. The simulation results have been shown to provide good predictions of pullout force as a function of displacement especially for the initial 30 mm displacement. For the granular material of size 40 mm, both the experimental and DEM results demonstrate that the triangular geogrid of size 75 mm outperforms the square geogrid of size 65 mm. Besides, the simulations have given valuable insight into the interaction between particle and geogrid and also revealed similar deformation behavior of geogrids during pullout. Therefore, the DEM provides a tool which enable to model other possible prototype geogrid and investigate their performance before manufacture.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Central University

참고문헌

  1. ASTM D6637. (2001), Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method, American Society for Testing Materials, West Conshohocken, Pennsylvania, U.S.A.
  2. Bhandari, A. and Han, J. (2010), "Investigation of geotextile-soil interaction under a cyclic vertical load using the discrete element method", Geotext. Geomembranes, 28(1), 33-43. https://doi.org/10.1016/j.geotexmem.2009.09.005
  3. Chen, C., McDowell, G.R. and Thom, N.H. (2012), "Discrete element modelling of cyclic loads of geogrid-reinforced ballast under confined and unconfined conditions", Geotext. Geomembranes, 35, 76-86. https://doi.org/10.1016/j.geotexmem.2012.07.004
  4. Chen, C., McDowell, G.R. and Thom, N.H., (2014), "Investigating geogrid-reinforced ballast: Experimental pull-out tests and discrete element modelling", Soil. Found., 54(1), 1-11. https://doi.org/10.1016/j.sandf.2013.12.001
  5. Cundall, P.A. and Strack, O.D. (1979), "A discrete numerical model for granular assemblies", Geotechnique, 29(1), 47-65. https://doi.org/10.1680/geot.1979.29.1.47
  6. Deb, K. and Konai, S. (2014), "Bearing capacity of geotextile-reinforced sand with varying fine fraction", Geomech. Eng., 6(1), 33-45. https://doi.org/10.12989/GAE.2014.6.1.033
  7. Ferellec, J.F. and McDowell, G.R., (2012), "Modelling of ballast-geogrid interaction using the discrete-element method", Geosynth. Int., 19(6), 470-479. https://doi.org/10.1680/gein.12.00031
  8. Gere, J. and Goodno, B. (2004), Stresses in Beams (Basic Topics), in Mechanics of Materials, Brooks/Cole Publishing Company, Belmont, California, U.S.A., 304-306.
  9. Han, J. and Bhandari, A. (2011), "The influence of geogrid aperture size on the behavior of reinforced granular bases", Proceedings of the International Symposiumon Geomechanics and Geotechnics: From Micro to Macro, Shanghai, China, October.
  10. Itasca (2008), Particle Flow Code (PFC) in Three Dimension, Itasca Consulting Group, Inc., Minneapolis, Minnesota, U.S.A.
  11. Jenner, C. (2009), "Significant developments over the last 25 years", Proceedings of the Jubilee Symposium on Polymer Geogrid Reinforcement, London, U.K., September.
  12. Kim, K.S., Yoon, Y.W. and Song, K.I. (2018), "Pullout resistance of treadmats for reinforced soil structures", Geomech. Eng., 14(1), 83-90. https://doi.org/10.12989/GAE.2018.14.1.083
  13. Koerner, R.M. (2009), "An overview of geogrids", Proceedings of the Jubilee Symposium on Polymer Geogrid Reinforcement, London, U.K., September.
  14. Konietzky, H., te Kamp, L. Groeger, T. and Jenner, C. (2004), "Use of DEM to model the interlocking effect of geogrids under static and cyclic loading", Proceedings of the 2nd International PFC Symposium, Kyoto, Japan, October.
  15. Mahdi, M. and Katebi, H. (2015), "Numerical modeling of uplift resistance of buried pipelines in sand, reinforced with geogrid and innovative grid-anchor system", Geomech. Eng., 9(6), 757-774. https://doi.org/10.12989/gae.2015.9.6.757
  16. McDowell, G., Harireche, O., Konietzky, H., Brown, S. and Thom, N. (2006), "Discrete element modelling of geogrid-reinforced aggregates", Proc. Inst. Civ. Eng. Geotech. Eng., 159(1), 35-48. https://doi.org/10.1680/geng.2006.159.1.35
  17. Mulabdic, M. and Minazek, K. (2010), "Effect of transverse ribs of geogrids on pullout resistance", Proceedings of the 9th International Conference on Geosynthetics, Guaruja, Brazil, May.
  18. Ngo, N.T., Indraratna, B. and Rujikiatkamjorn, C. (2014), "DEM simulation of the behavior of geogrid stabilised ballast fouled with coal", Comput. Geotech., 55, 224-231. https://doi.org/10.1016/j.compgeo.2013.09.008
  19. Qian, Y., Mishra, D., Tutumluer, E. and Kwon, J. (2013), "In comparative evaluation of different aperture geogrids for ballast reinforcement through triangular testing and discrete element modeling", Proceedings of the 2013 Geosynthetics Conference, Long Beach, California, U.S.A., April.
  20. Stahl, M., Konietzky, H., Te Kamp, L. and Jas, H. (2014), "Discrete element simulation of geogrid-stabilised soil", Acta Geotechnica, 9(6), 1073-1084. https://doi.org/10.1007/s11440-013-0265-0
  21. Tensar International. (2010), TriAx Brochure, Tensar International Ltd, Blackburn, U.K.
  22. Tutumluer, E., Huang, H. and Bian, X. (2010), "Geogrid-aggregate interlock mechanism investigated through aggregate imaging-based discrete element modeling approach", Int. J. Geomech., 12(4), 391-398. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000113
  23. Wang, Z., Jacobs, F. and Ziegler, M. (2014), "Visualization of load transfer behavior between geogrid and sand using PFC 2D", Geotext. Geomembranes, 42(2), 83-90. https://doi.org/10.1016/j.geotexmem.2014.01.001
  24. Zhang, J., Yasufuku, N. and Ochiai, H. (2007), "A few considerations of pullout test characteristics of geogrid reinforced sand using DEM analysis", Geosynth. Eng. J., 22, 103-110. https://doi.org/10.5030/jcigsjournal.22.103

피인용 문헌

  1. Discrete Element Analysis of the Load Transfer Mechanism of Geogrid-Ballast Interface under Pull-Out Load vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8892922