Stress and Buckling Analysis of Cylindrical Steel Water Tanks under Seismic Loading

The most common tanks are cylindrical steel liquid storage tanks among the steel tanks used to store liquid. In studies conducted to determine the type of damage that occurred in these tanks during the earthquake and the factors that caused these damages, it was revealed that liquid storage tanks performed poorly in earthquakes and requirement of new methods were developed to increase earthquake resistance. Seismic analysis of tanks containing liquid-structure interaction is a complex problem. At the basis of the complexity is the fact that the tank has a thin wall, the multidynamic responses of the axial and circumferential curves of the walls and the modes of agitated liquid, the non-linear behavior of the liquid and vibrating wall it contains and the buckling and deforming modes of the tank wall. One of the best methods for examining the real behavior of tank-liquid interaction systems in a short time is the finite element method. In this study, using the finite element method (FEM), stresses occurring in cylindrical steel liquid tanks under seismic loading and buckling due to these stresses are investigated. Seismic analysis was carried out on three different wall thicknesses of 4mm, 6mm and 8mm for the top-open, conical-closed and dome-closed tanks, and it was tried to determine the best tank lid transport to reduce equivalent stresses and reduce buckling