Publication | Open Access
Simple Procedure for Seismic Analysis of Liquid-Storage Tanks
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Geotechnical EngineeringTheoretical BackgroundEarthquake EngineeringEngineeringHydroelasticityFoundation EngineeringEurocode 8Civil EngineeringSoil-structure InteractionSeismic AnalysisGeomechanicsStructural DynamicStructural MechanicsSimple ProcedureConcrete TanksStructural Engineering
The paper outlines the theoretical basis for a simplified seismic design procedure for cylindrical ground‑supported tanks. The procedure incorporates impulsive and convective (sloshing) liquid actions in flexible steel or concrete tanks fixed to rigid foundations, computing base shear, overturning moment, and sloshing wave height from site‑response spectra with a few simple calculations. An example demonstrates the method and compares it to detailed modal analysis, and the simplified procedure has been adopted in Eurocode 8.
This paper provides the theoretical background of a simplified seismic design procedure for cylindrical ground-supported tanks. The procedure takes into account impulsive and convective (sloshing) actions of the liquid in flexible steel or concrete tanks fixed to rigid foundations. Seismic responses - base shear, overturning moment, and sloshing wave height - are calculated by using the site response spectra and performing a few simple calculations. An example is presented to illustrate the procedure, and a comparison is made with the detailed modal analysis procedure. The simplified procedure has been adopted in Eurocode 8.