Impact Analysis of Cylindrical Steel Water Storage Tanks Under the Seismic Action

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Çelik A. İ.

International journal of advances in engineering and pure sciences (Online), vol.34, no.1, pp.1-13, 2022 (Peer-Reviewed Journal)


Cylindrical steel liquid tanks are widely used to store various liquids such as water, oil and industrial chemicals. They are used in nuclear power plants for cooling purposes in recent years. Petroleum or other hazardous chemicals in steel liquid tanks can cause large financial and environmental damage due to damages in tanks during the earthquake. The main goal of this paper is to reveal buckling shapes of cylindrical steel tanks with nonlinear seismic analysis according to different roof shapes. Tanks were designed as open-roof, flat-roofed, conical-roofed and torispherical-roofed tanks. For this aim, El-Centro earthquake recording of 0.22 seconds was used for determining the significant shell buckling events. In addition, this earthquake values are ideal for impact analysis because ANSYS Workbench “Explicit Dynamics” tool provides very good results in the dynamic analysis of structures under destructive and short-term forces. In order to provide the interaction between the water and the tank wall, for tank “Lagrangian” and for water "Eulerian Body" mesh technique is preferred in the “Explicit Dynamics” model. As a result of this study, many collapse events were determined due to seismic ground motion in cylindrical steel liquid storage tanks. If the tank was closed in the shape of a torispherical, less buckling would occur in the tank.