Civil Engineering
Seismic response of base isolated liquid storage ground tanks

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Abstract

In this paper, the seismic responses of base-isolated broad and slender cylindrical liquid storage ground tanks are investigated. Three types of isolation systems are considered. The seismic responses are compared with the corresponding responses of non-isolated tanks. Moreover, a parametric study was conducted to evaluate the effect of tank aspect ratio, isolation period, and friction coefficient of the FPS system on key responses of the tank. It was found that, base isolation is quite effective in reducing the earthquake response of ground liquid storage tanks. Generally speaking, 50–90% reductions in both base shear and impulsive displacement responses were observed. The convective displacement was observed to be 20–70% higher than that associated with fixed base tanks leading to an essential need of increasing the clear height above the liquid surface. Base isolation was found to be more effective for slender tanks in comparison with broad tanks.

Keywords

Ground liquid storage tanks
Seismic isolation systems
Aspect ratio
Isolation period
Broad
Slender

Cited by (0)

Ayman Ahmed Seleemah graduated from Cairo University in 1986 and obtained his M.Sc. degree from the same university. He obtained his Ph.D. degree jointly from Cairo University and the State University of New York at Buffalo, USA. His fields of interest include earthquake engineering for buildings and bridges, seismic isolation of buildings, tanks, and bridges; seismic energy dissipation systems and development; offshore structures; and neural network applications in structural engineering.

Mohamed El-Sayed El-Sharkawy obtained his M.Sc. degree from Tanta University. His fields of interest include earthquake engineering for buildings and bridges, seismic isolation of buildings, tanks and seismic energy dissipation systems.

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