Evaluation Of Seismic Loads On Elevated
Storage Tanks
Author(s)
G. Perillo & M. Rizzone
Abstract
Suitable response of hydraulic structures to seismic actions represents an
important requirement in order to organise aid in the areas damaged by seismic
events; therefore accurate assessment of hydrodynamic loads acting on the
structure represents the first step in a correct anti-seismic structural design.
With particular reference to water storage tanks, the problem of
hydrodynamic actions exerted by an earthquake on the walls of a tank has been
investigated, whether fully or partially buried below ground and considered to be
non-deformable (‘rigid’ scheme), and the tank’s tendency to deform has been
analysed, taking into account the liquid-shell interaction (‘elastic’ scheme) and
highlighting its sometimes significant influence on the entity of hydrodynamic
actions.
The aim of this research project is to analyse elevated storage tanks in seismic
areas, comprising a tank mounted on a single vertical column. Applying the
same considerations made for ‘ground-based’ tanks to such a scheme is
immediately possible because the liquid mass fully enters the energy balance of
the structural system and its quantity does not vary over time and formal
variations in the hydraulic profile over time do not entail substantial
modifications in the system’s overall response.
Analysis of the dynamic response of elevated tanks, performed by means of
the mathematical model described and limited to concrete structural systems
with a circular tank, has shown that the entity of hydrodynamic motions can be
significant and, furthermore, noticeably greater than those for equally sized tanks
on the ground.
Keywords: hydrodynamic effects, seismic motions, elevated storage tanks.
Keywords
hydrodynamic effects, seismic motions, elevated storage tanks
Related Book
Other papers in this volume
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