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From the paper cited below by Godoy, etal: “The settlement of the foundation in large, thin walled shells, has been of great concern to engineers, and several failures have been attributed to this cause (see Jonaidi and Ansourian 1998 and the references cited there). In this research the central angle at the base of the shell over which the settlement is modeled is taken as the main parameter of the problem; the control parameter is the maximum amplitude of the settlement, while the response is measured in terms of out of plane displacements w. Both linear and nonlinear studies have been carried out.”
From:
Luis A. Godoy, Genock Portela, Eduardo M. Sosa, Luis E. Surez, Juan C. Virella, and Raúl Zapata (Department of Civil Engineering and Surveying University of Puerto Rico, Mayaguez, PR 00681-9041, Puerto Rico),
“Damage due to buckling in aboveground storage tanks” (publisher not given, date not given in the pdf file. Most recent citation is dated 2001)
ABSTRACT: The damage due to buckling in thin-walled, short cylindrical aboveground tanks is discussed in this paper. Various sources of buckling are considered, including wind, earthquake, support settlement and vacuum during emptying of the tank. In all cases the tanks were modeled using finite elements, and the results include the buckling load and associated buckling mode, and the postbuckling equilibrium path. The results have been obtained using the computer packages ABAQUS and ALGOR. Experiments on flexible small-scale tanks with settlement of the supports on a sector of the foundation were conducted. Also, wind tunnel tests were carried out on rigid tanks with and without a roof to evaluate the pressure distribution due to wind.
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