Simple Procedure for Seismic Analysis of Liquid-Storage Tanks
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Simple Procedure for Seismic Analysis of Liquid-Storage Tanks
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Simple Procedure for Seismic Analysis of Liquid-Storage Tanks

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Praveen K. Malhotra, Senior Res. Scientist
Factory Mutual Research, Norwood, MA, USA
Thomas Wenk, Civil Eng.
Swiss Federal Institute of Technology, Zurich, Switzerland
Martin Wieland, Dr
Electrowatt Engineering Ltd, Zurich, Switzerland

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.

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