Dynamic Fluid-structure-soil Interaction:
Applications In Earthquake Engineering
Author(s)
A. Dimas, N. Bazeos, S. Bousias, T. C. Triantafyllou
& D. L. Karabalis
Abstract
A new discrete model is presented for the evaluation of the dynamic
characteristics, i.e. eigenfrequencies and eigenmodes, of tanks of arbitrary shape
and fill level. The accuracy and efficiency of the proposed methodology is
demonstrated via a number of comparison studies. The above discrete model is
combined with structural and soil simulation models for the efficient dynamic
analysis of 3-D tanks under earthquake excitation. The obtained results are in
excellent agreement to those obtained using detailed analytical and FEM models.
Keywords: discrete sloshing model, arbitrary geometry, arbitrary fill level,
seismic excitation, dynamic fluid-structure-soil interaction.
1 Introduction
The safe keeping and uninterrupted flow of liquids or liquid-like materials is of
crucial and multifold importance to the industrialized world. Therefore, the
interest on the seismic behaviour of modern structures used for storage of such
materials has remained strong since the pioneering work of Lamb [1] and is
periodically reinforced by the disruption caused by several seismic events, e.g.
the 1964 Alaska earthquake. A simple, but accurate and efficient, methodology
for the estimation of the hydrodynamic pressures exerted on the walls of a tank,
was proposed in the pioneering work of Housner [2]. In these studies on nondeformable
vertical prismatic tanks resting on rigid foundations, the solution
describing the total hydrodynamic pressure was decomposed into two discrete
parts: the \“impulsive” and the \“convective”. The impulsive pressure component
is due to a portion of the liquid accelerating with the rigid tank, while the
Keywords
discrete sloshing model, arbitrary geometry, arbitrary fill level,
seismic excitation, dynamic fluid-structure-soil interaction
Related Book
Other papers in this volume
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