Geomechanics and Engineering

  • 제15권5호
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  • Pages.1101-1111
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Static behavior of a laterally loaded guardrail post in sloping ground by LS-DYNA

  • Woo, Kwang S. (Department of Civil Engineering, Yeungnam University) ;
  • Lee, Dong W. (Soohyung Industry Development Co. Ltd.) ;
  • Yang, Seung H. (Department of Civil Engineering, Yeungnam University) ;
  • Ahn, Jae S. (School of General Education, Yeungnam University)
  • 투고 : 2017.02.07
  • 심사 : 2018.02.19
  • 발행 : 2018.08.10
⟨ 이전 논문 다음 논문 ⟩

초록

This study aims to present accurate soil modeling and validation of a single roadside guardrail post as well as a single concrete pile installed near cut slopes or compacted sloping embankment. The conventional Winkler's elastic spring model and p-y curve approach for horizontal ground cannot directly be applied to sloping ground where ultimate soil resistance is significantly dependent on ground inclination. In this study, both grid-based 3-D FE model and particle-based SPH (smoothed particle hydrodynamics) model available in LS-DYNA have been adopted to predict the static behavior of a laterally loaded guardrail post. The SPH model has potential to eliminate any artificial soil stiffness due to the deterioration of the node-connected Lagrangian soil mesh. For this purpose, this study comprises two parts. Firstly, only 3-D FE modeling has been tested to show the numerical validity for a single concrete pile in sloping ground using Mohr-Coulomb material. However, this material option cannot be implemented for SPH elements. Nevertheless, Mohr-Coulomb model has been used since this material model requires six input soil data that can be obtained from the comparative papers in literatures. Secondly, this work is extended to compute the lateral resistance of a guardrail post located near the slope using the hybrid approach that combines Lagrange FE elements and SPH elements by the suitable node-merging option provided by LS-DYNA. For this analysis, the FHWA soil material developed for application to road-base soils has been used and also allows the application of SPH element.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea(NRF)

참고문헌

  1. Borovinsek, M., Vesenjak, M., Ulbin, M. and Ren, Z. (2007), "Simulation of crash tests for high containment levels of road safety barriers", Eng. Fail. Anal., 14(8), 1711-1718. https://doi.org/10.1016/j.engfailanal.2006.11.068
  2. Cabalar, A.F. (2016), "Cyclic behavior of various sands and structural materials interfaces", Geomech. Eng., 10(1), 1-19. https://doi.org/10.12989/gae.2016.10.1.001
  3. Carter, D.P. (1984), "A non-linear soil model for predicting lateral response", Ph.D. Dissertation, University of Auckland, Auckland, New Zealand.
  4. Chae, K.S., Ugai, K. and Wakai, A. (2004), "Lateral resistance of short single piles and pile groups located near slopes", J. Geomech., 4(2), 93-103. https://doi.org/10.1061/(ASCE)1532-3641(2004)4:2(93)
  5. Georgiadis, K. and Georgiadis, M. (2010), "Undrained lateral pile response in sloping ground" J. Geotech. Geoenviron. Eng., 136(11), 1489-1500. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000373
  6. Georgiadis, K. and Georgiadis, M. (2012), "Development of p-y curves for undrained response of piles near slopes", Comput. Geotech., 40, 53-61. https://doi.org/10.1016/j.compgeo.2011.09.005
  7. Gingold, R.A. and Monaghan, J.J. (1977), "Smoothed particle hydrodynamics-theory and application to non-spherical stars", Mon. Not. R. Astron. Soc., 181(3), 375-389. https://doi.org/10.1093/mnras/181.3.375
  8. Hirai, H. (2012), "A Winkler model approach for vertically and laterally loaded piles in nonhomogeneous soil", J. Numer. Anal. Meth. Geomech., 36(17), 1869-1897. https://doi.org/10.1002/nag.1078
  9. Jafarnia, M. and Varzaghani, M.I. (2016), "Effect of near field earthquake on the monuments adjacent to underground tunnels using hybrid FEA-ANN technique", Geomech. Eng., 10(4), 757-768. https://doi.org/10.12989/gae.2016.10.6.757
  10. Jiang, H. and Xie, Y. (2011) "A note on the Mohr-Coulomb and Drucker-Prager strength criteria", Mech. Res. Commun., 38(4), 309-314. https://doi.org/10.1016/j.mechrescom.2011.04.001
  11. Kim, B.T., Kim, N., Lee. W.J. and Kim, Y.S. (2004), "Experimental load-transfer curves of laterally loaded piles in Nak-Dong River sand", J. Geotech. Geoenviron. Eng., 130(4), 416-425. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:4(416)
  12. Kulak, R.F. and Schwer, L. (2012), "Effect of soil material models on SPH simulations for soil-structure interaction", Proceedings of the 12th International LS-DYNA Users Conference, Dearbon, Michigan, U.S.A, June.
  13. Lee, D.W., Ahn, J.S., and Woo, K.S. (2014), "Vehicle impact analysis of flexible barriers supported by different shaped posts in sloping ground", Adv. Mech. Eng., 6, 1-8.
  14. Lewis, B.A. (2004), Manual for LS-DYNA Soil Material Model 147, FHWA-HRT-04-095, APTEK, Incorporated, Colorado Springs, Colorado, U.S.A.
  15. Lingenfelter, J.L., Rosenbaugh, S.K., Bielenberg, R.W., Lechtenberg, K.A., Faller, R.K. and Reid, J.D. (2016), Midwest Guararail System(MGS) with an Omitted Post, Report No. TRP-03-326-16.
  16. Liu, M.B. and Liu, G.R. (2010), "Smoothed particle hydrodynamics(SPH): An overview and recent developments", Arch. Comput. Meth. Eng., 17(1), 25-76. https://doi.org/10.1007/s11831-010-9040-7
  17. LSTC (2012), LS-DYNA Keyword User's Manual, (Version 971 R6.0.0), Livermore Software Technology Corporation, Livermore, California, U.S.A.
  18. Lucy, L.B. (1977), "A numerical approach of the testing of the fission hypothesis", Mon. Not. R. Astron. Soc., 82(12), 1013-1024.
  19. Matlock, H. (1970), "Correlation for design of laterally loaded piles in soft clays", Proceedings of the 2nd Offshore Technology Conference, Houston, Texas, U.S.A., May.
  20. Murff, J.D. and Hamilton, J.M. (1993), "P-ultimate for undrained analysis of laterally loaded piles", J. Geotech. Eng., 119(1), 91-107. https://doi.org/10.1061/(ASCE)0733-9410(1993)119:1(91)
  21. Nastasescu, V. (2010), "SPH method in applied mechanics", UPB Sci. Bull. Ser. D Mech. Eng., 72(4), 13-20.
  22. Plaxico, C., Patzner, G. and Malcom, R. (1998), "Finite element modeling of guardrail timber posts and post-soil interaction", Transport. Res. Record J., (1647), 139-146.
  23. Reese, L.C., Cox, W.R. and Koop, F.D. (1974), "Analysis of laterally loaded piles in sand", Proceeding of the 6th Offshore Technology Conference, Houston, Texas, U.S.A., May
  24. Reese, L.C. and Welch, R.C. (1975), "Lateral loading of deep foundations in stiff clay", J. Geotech. Eng., 101(7), 633-649.
  25. Sheikh, N.M., Abu-Odeh, A.Y. and Bligh, R.P. (2011), "Finite element modeling and validation of guardrail steel post deflecting in soil at varying embedment depths", Proceeding of the 11th International LS-DYNA Users Conference, Dearbon, Michigan, U.S.A., June.
  26. Sheikh, N.M., Bligh, R.P. and Menges, W.L. (2009), Guidelines for W-beam Guardrail Post Installation in Rock, Report No. 405160-7-1, Texas Transportation Institute, Texas, U.S.A.
  27. Vesic, A.S. (1961), "Beam on elastic subgrade and the Winkler hypothesis", Proceedings of the 5th International Conference for Soil Mechanics, Paris, France, July.
  28. Wu, W. and Thomson, R. (2007), "A study of the interaction between a guardrail post and soil during quasi-static and dynamic loading", J. Impact Eng., 34(5), 883-898. https://doi.org/10.1016/j.ijimpeng.2006.04.004
  29. Yoshida, Y., Motonori, I. and Kokusho, T. (1988), "Empirical formulas of SPT blow-counts for gravelly soils", Proceedings of the 1st International Symposium on Penetration Testing, Orlando, Florida, U.S.A., March.
  30. Zhang, C., Ji, J., Gui, Y., Kodikara, J., Yang, S. and He, L. (2016), "Evaluation of soil-concrete interface shear strength based on LS-SVM", Geomech. Eng., 11(3), 361-372 https://doi.org/10.12989/gae.2016.11.3.361