Research Information System
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.