Appl.Mech.Rev. 43, 261-282, 1990


STORAGE TANKS UNDER EARTHQUAKE LOADING

F.G. Rammerstorfer¹, K. Scharf¹ and F.D. Fischer²

¹Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
²Institute of Mechanics,
University of Mining and Metallurgy, Leoben, Austria


Abstract - This is a state-of-the-art review of various treatments of earthquake loaded liquid filled shells by the mehtods of earthquake engineering, fluid dynamics, strutural and soil dynamics, as well as the tehory of stability and computational mechanics. Different types of tanks and different possibilities of tank failure will be discussed. We will emphasize cylindircal above-ground liquid storage tanks with a vertical axis. But many of the treatments are also valid for other tank configurations. For the calculation of the cynamically activated pressure due to an earthquake a fluid-structure-soil interaction problem must be solved. The review will describe the methods, propsed by different authors, to solve this interaction problem. To study the dynamic behavior of liquid storage tanks, one must distinguish between anchored and unanchored tanks. In the case of an anchored tank, the tank bottom edge is fixed to the foundation. If the tank is unanchored, partial lifting of the tank's bottom may occur, and a strongly nonlinear problem has to be solved. We will compare the various analytical and numerical models applicable to this problem, in combination with experimental data. An essential aim of this review is to give a summary of methods applicable as tools for an earthquake resistant tank design, which can be used by an engineer engaged in the construction of liquid storage tanks.


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