Publication Abstract

Proceedings of DFI-India 2018: 8th Conference on Deep Foundation Technologies for Infrastructure Development in India, (DFI)

Behavior of Pile in Cohesive Soil Subjected to Combined Vertical and Lateral Load Considering P-? Effect
Tanumaya Mitra, Research Scholar, Kalyan Kumar Chattopadhyay, Professor of Civil Engineering and Ambarish Ghosh, Professor of Civil Engineering

In this study, Beam on Nonlinear Winkler Foundation (BNWF) approach has been used to assess the behaviour of pile embedded in homogeneous clay bed, under combined vertical and lateral load. Non-linearity of soil and P-? effect have been taken into account. The result shows that if P-? effect is considered, the effect of vertical load will reduce the lateral load carrying capacity and increases the pile head deflection by inducing additional moment at pile head. The effects of variation of soil cohesion, slenderness ratios (L/D) and pile stiffness factors (Ep/Es) have also been investigated in this study. With the increase in pile stiffness factor, pile head deflection increases whereas increase in L/D ratios and cohesion lead to decrease the depth of fixity and lateral displacement of pile, under a fixed lateral load. For lower L/D ratios (L/D < 20), pile behaves like a rigid pile; for L/D = to 30, pile behaviour changes from rigid to flexible.

 article #3141; publication #1050 (India2018)