Dynamics of Solid-Containing Tanks. I: Rigid Tanks

Abstract

Making use of a relatively simple, approximate but reliable method of analysis, a study is made of the responses to horizontal base shaking of vertical, rigid circular cylindrical tanks that are filled with a uniform viscoelastic material. After describing the method of analysis, comprehensive numerical data are presented which elucidate the response of the system and the effects and relative importance of the various parameters involved. In addition to the characteristics of the ground motion, the parameters examined include the ratio of tank height-to-tank radius and the physical properties of the contained material. Both harmonic and earthquake-induced ground motions are considered. The response quantities examined are the dynamic wall pressures, the critical forces in the tank wall, and the forces exerted on the foundation. The effects of tank wall flexibility are studied in a companion paper.