Nonlinear FEA of Pile Group Subjected to Lateral Load

V. A.  Sawant; K. B.  Ladhane

doi:10.4236/ojce.2016.61003

V. A. Sawant, K. B. Ladhane

Abstract: A finite element method based program has been developed to perform the static nonlinear analysis of pile group with six different configurations subjected to lateral loads. The pile has been assumed to remain elastic all the time whereas the soil has been assumed to undergo plastic yielding following von Mises yield criterion. The formulation of elasto-plastic analysis following von Mises yield criterion has been explained. The effect of Drucker-Prager and Mohr Coulomb yield criteria on the response of pile group is also investigated. The whole analysis is based on incremental load application. The external load is applied in small increments and the stresses are initially computed assuming elastic constitutive relation. Significant effect of soil nonlinearity is observed at smaller pile spacing which reduces with increase in spacing.

Keywords: Pile, Lateral Load, Constitutive Matrix, Stress Invariants, Yield Criterion

Cite this paper: Sawant, V. and Ladhane, K. (2016) Nonlinear FEA of Pile Group Subjected to Lateral Load. Open Journal of Civil Engineering, 6, 19-30. doi: 10.4236/ojce.2016.61003.

References

[1] Randolph, M.F. (1981) The Response of Flexible Piles to Lateral Loading. Géotechnique, 31, 247-259.
http://dx.doi.org/10.1680/geot.1981.31.2.247

[2] Muqtadir, A. (1984) Three-Dimensional Nonlinear Soil-Structure Interaction Analysis of Pile Groups and Anchors. Ph.D. Thesis, Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, Arizona.

[3] Muqtadir, A. and Desai, C.S. (1986) Three-Dimensional Analysis of Pile-Group Foundation. International Journal for Numerical and Analytical Methods in Geomechanics, 10, 41-58.
http://dx.doi.org/10.1002/nag.1610100104

[4] Najjar, Y.M. and Zaman, M.M. (1986) Three-Dimensional Nonlinear Behavior of Pile Group Foundation: Effect of Loading Sequence. Annual Meeting of the OAS, Tahlequah, 14 November 1986.

[5] Najjar, Y.M. and Zaman, M.M. (1988) Effect of Loading Sequence and Soil Nonlinearity on the Response of a Pile Group Foundation Using a Three-Dimensional Finite Element Analysis. Proceedings of the 6th International Conference on Numerical Methods in Geomechanics, Innsbruck, 11-15 April 1988, 1127-1134.

[6] Ladhane, K.B. and Sawant, V.A. (2016) Effect of Pile Group Configurations on Nonlinear Dynamic Response. International Journal of Geomechanics, 16.
http://dx.doi.org/10.1061/(asce)gm.1943-5622.0000476

[7] Viladkar, M.N., Noorzaei, J. and Godbole, P.N. (1995) Convenient Forms of Yield Criteria in Elasto-Plastic Analysis of Geological Materials. Computers & Structures, 54, 321-337.
http://dx.doi.org/10.1016/0045-7949(94)E0199-C

[8] Drucker, D.C. and Prager, W. (1952) Soil Mechanics and Plastic Analysis on Limit Design. Journal of applied Mathematics, 10, 157-165.

[9] Sloan, S.W. and Booker, J.R. (1986) Removal of Singularities in Tresca and Mohr-Coulomb Yield Functions. Communications in Applied Numerical Methods, 2, 173-179.
http://dx.doi.org/10.1002/cnm.1630020208

[10] Owen, D.R.J. and Hinton, E. (1980) Finite Element Programming in Plasticity. Pineridge Press Limited, Swansea, UK.

[11] Nayak, G.C. and Zienkiewicz, O.C. (1972) Convenient Forms of Stress Invariants for Plasticity. Proceedings of the ASCE Journal of the Structural Division, 98, 949-953.

[12] Gabr, M.A., Lunne, T. and Powell, J.J. (1994) p-y Analysis of Laterally Loaded Piles in Clay Using DMT. Journal of Geotechnical Engineering, 120, 816-837.
http://dx.doi.org/10.1061/(ASCE)0733-9410(1994)120:5(816)

[13] Ismael, N.F. and Klym, T.W. (1978) Behaviour of Rigid Piers in Layered Cohesive Soils. Journal of Geotechnical Engineering, 104, 1061-1074.

[14] Dewaikar, D.M., Verghese, S., Sawant, V.A. and Chore, H.S. (2007) Non-Linear 3-D FEA of Laterally Loaded Pile Group Incorporating No-Tension Behaviour of Soil. Indian Geotechnical Journal, 37, 174-189.