Flexural Behavior of Laterally Loaded Tapered Piles in Cohesive Soils
Author(s)
Musab Aied Qissab
ABSTRACT
In this paper, the flexural behavior of laterally loaded tapered piles in cohesive soils is investigated. The exact solution for the governing differential equation of the problem is obtained based on the beam-on-elastic foundation approach in which the soil reaction on the pile is related directly to the pile lateral deflection. In this investigation, the modulus of subgrade reactions is assumed to be constant along the pile depth. Parametric study through numerical examples is carried out to prove the validity and accuracy of the obtained results. In general, the derived displacement field can be used to study pile response in multilayered soil profiles by subdividing the pile into a number of elements. It is found that tapered piles show stiffer behavior than that for prismatic ones having the same material volume with an optimum stress distribution along the pile depth. Accordingly, tapered piles are more efficient and economic than those having the same material volume. Verification is also carried out for the obtained results through finite element analysis and the selected number of elements gives a very good agreement for lateral deflection and a larger number of elements is required to obtain better results for bending moment because of moment loss resulting from the lack of shear diagram.
In this paper, the flexural behavior of laterally loaded tapered piles in cohesive soils is investigated. The exact solution for the governing differential equation of the problem is obtained based on the beam-on-elastic foundation approach in which the soil reaction on the pile is related directly to the pile lateral deflection. In this investigation, the modulus of subgrade reactions is assumed to be constant along the pile depth. Parametric study through numerical examples is carried out to prove the validity and accuracy of the obtained results. In general, the derived displacement field can be used to study pile response in multilayered soil profiles by subdividing the pile into a number of elements. It is found that tapered piles show stiffer behavior than that for prismatic ones having the same material volume with an optimum stress distribution along the pile depth. Accordingly, tapered piles are more efficient and economic than those having the same material volume. Verification is also carried out for the obtained results through finite element analysis and the selected number of elements gives a very good agreement for lateral deflection and a larger number of elements is required to obtain better results for bending moment because of moment loss resulting from the lack of shear diagram.
Cite this paper
Qissab, M. (2015) Flexural Behavior of Laterally Loaded Tapered Piles in Cohesive Soils. Open Journal of Civil Engineering, 5, 29-38. doi: 10.4236/ojce.2015.51004.
Qissab, M. (2015) Flexural Behavior of Laterally Loaded Tapered Piles in Cohesive Soils. Open Journal of Civil Engineering, 5, 29-38. doi: 10.4236/ojce.2015.51004.
References
[1] Wei, J.Q. (1998) Experimental Investigation of Tapered Piles. M.Sc. Thesis, University of Western Ontario, London, Canada. [2] Horvath, J.S., Trochalides, T., Burns, A. and Merjan, S. (2004) A New Type of Tapered Steel Pipe Pile for Transportation Applications. Geo-Trans, American Society of Civil Engineers Geo-Institute, California. [3] Shanker, K., Basudhar, P.K. and Patra, N.R. (2008) Flexural Response of Tapered Piles in Liquefied Soils. The 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), Goa. [4] Zhan, Y., Wang, H. and Liu, F. (2012) Numerical Investigation on Load Capacity Behavior of Tapered Pile Foundations. EJGE, 17, 1969-1980. [5] Hetenyi, M. (1946) Beams on Elastic Foundations. University of Michigan Press, Ann Arbor.
[1] Wei, J.Q. (1998) Experimental Investigation of Tapered Piles. M.Sc. Thesis, University of Western Ontario, London, Canada. [2] Horvath, J.S., Trochalides, T., Burns, A. and Merjan, S. (2004) A New Type of Tapered Steel Pipe Pile for Transportation Applications. Geo-Trans, American Society of Civil Engineers Geo-Institute, California. [3] Shanker, K., Basudhar, P.K. and Patra, N.R. (2008) Flexural Response of Tapered Piles in Liquefied Soils. The 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), Goa. [4] Zhan, Y., Wang, H. and Liu, F. (2012) Numerical Investigation on Load Capacity Behavior of Tapered Pile Foundations. EJGE, 17, 1969-1980. [5] Hetenyi, M. (1946) Beams on Elastic Foundations. University of Michigan Press, Ann Arbor.