Elastic buckling loads of partially embedded piles in cohesive soil

摘要

Buckling of piles may play an important role in the pile’s design especially for piles that are partially embedded in soil orwhen the upper layers of the fully embedded piles are loose or weak soils. In this paper, the elastic stability of partiallyembedded piles subjected to axial force is developed considering all the parameters that may be affecting the buckling load.These parameters are the ratio of the embedded length to the pile length, the elastic modulus of the soil, the pile overalllength, and the flexural stiffness of pile that represents the cross section of the pile and its material. Both of the methods offinite element and the minimum potential energy are performed to obtain the buckling loads and then the effective length ofthe considered pile. The soil is considered as a continuous elastic medium that is replaced by many equally spaced elasticsupports of equal rigidity in the finite element modelling. The numerical results are presented in charts to clarify the effectof each parameter on the effective length coefficient of the considered piles. The results of the coefficient of effective lengththat obtained by the energy technique and the finite element method are also compared in this paper.