Authors:
Mohsen Jamalvandi; Moslem Amiri;
Abstract:
In this study, the maximum dynamic parameters of tanks including the vertical displacement of the surface
fluid (sloshing), the horizontal displacements of the fluid (convective) and the base seismic isolator have been
investigated. Using nonlinear dynamic analysis under the seismic excitation near fault, three types of tanks
having fixed and same heights and different diameters titled as broad, moderate and slender tanks have been
investigated. The tanks are selected in different supporting conditions including isolated base with and without
seismic isolation lead rubber bearings (LRB), in two different states of fixed welded roof and open roof in
different states of liquid height level. The speed potential theory, in this study, was used to investigate the fluidstructure
interaction (FSI) problem. The linearized free surface boundary condition is considered in estimating
the sloshing part of response. According to the results, it was observed that the contribution of the convective
component to the total response has a significant effect on the seismic response of the tanks and that the
maximum fluid height (sloshing) increases in isolated base tanks. In addition, base isolation significantly
reduces the horizontal displacements of the fluid compared to the fixed base tanks.
Keywords:
Seismic excitation, Convection, Sloshing, FSI, Seismic isolation, Dynamic analysis