Dynamic Poroelastic Soil Pressures On A Pair Of
Rigid Retaining Walls Experiencing Base Rotation
Author(s)
D. D. Theodorakopoulos & D. E. Beskos
Abstract
The dynamic response of a pair of rigid retaining walls experiencing base
rotation due to horizontal harmonic ground shaking is studied analytically under
conditions of plane strain. The retained material is idealized as a uniform, fully
saturated poroelastic (with or without hysteretic damping) layer of soil of
constant thickness obeying Biot’s dynamic poroelastic theory. In the analysis,
emphasis is given to the calculation of the wall rotation angle. Parametric and
comparison studies are conducted in order to assess the effect of various
parameters, such as the rotational flexibility of the wall constraint, the properties
of the retained medium and the distance between the walls, on the response. It is
shown that, for a system experiencing base rotation, the resulted wall forces are
much lower than those obtained for fixed-based rigid walls.
Keywords: pair of retaining walls, poroelastic soil, harmonic seismic excitation,
wall rotation, dynamic response.
1 Introduction
The study of the dynamic behavior of retaining walls is of great importance in
the area of geotechnical / structural transportation facilities. The available
methods of dynamic / seismic response of retaining walls can be grouped into
three categories [1, 2] depending mainly on the degree of modeling elaboration
of the soil material.
In the present work the dynamic wall pressures and the associated forces on a
pair of rigid walls experiencing base rotation and retaining a uniform, fully
water-saturated layer of soil are evaluated. The problem is solved analytically /
numerically under conditions of plane strain. Wall pressures and forces are
induced by horizontal ground shaking harmonically varying with time and
Keywords
pair of retaining walls, poroelastic soil, harmonic seismic excitation,
wall rotation, dynamic response.
Related Book
Other papers in this volume
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