Kinematic Interaction Of A Single Pile In
Heterogeneous Soil
Author(s)
M. Maugeri, E. Motta, E. Raciti & D. Ardita
Abstract
The behaviour of deep foundation under static loads has been widely
investigated and the available calculation procedures can be considered suitable
for the current engineering applications. However, pile behaviour under seismic
loading is more complex and less known, because one can find the contemporary
action of inertial forces rising from the over-structure (inertial interaction) and of
the soil deformations rising from the seismic waves (kinematic interaction).
Italian code DM 14/01/2008 requires the dynamic soil-structure interaction in
seismic foundation design to be taken into account, but it does not give any
information about kinematic interaction strains evaluation criteria. Experimental
evidences and theoretical considerations of many authors show that simply the
kinematic interaction may induce high stresses on piles, especially near an
alternation between a soft and a rigid soil layer interface. In this work pile
behaviour due to kinematic interaction will be examined. An approach based on
the differential equation proposed by Kavvadas and Gazetas (Kinematic seismic
response and bending of free-head piles in layered soil. Géotechnique, 43, N.2,
207-222, 1993) will be used. The analysis is focused on the response of a single
pile in a heterogeneous three-layer soil profile.
Keywords: deep foundations, seismic loads, dynamic soil-structure interaction,
pile behaviour, numerical model.
1 Introduction
Pile seismic response results from a complex soil–pile–overstructure interaction
affected by non-linear phenomena, which takes place in the soil near piles and by
kinematic effects linked to ground shaking. Dynamic pile–soil interaction is
Keywords
deep foundations, seismic loads, dynamic soil-structure interaction,
pile behaviour, numerical model.
Related Book
Other papers in this volume
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