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Influence Of Seismic Isolation Systems On Behavior Of Fluid Inside Thin-walled Steel Tanks

Submitted2020-08-29
Last Update2021-09-30
TitleInfluence Of Seismic Isolation Systems On Behavior Of Fluid Inside Thin-walled Steel Tanks
Author(s)Author #1
Name: Mohsen Jamalvandi
Org: Islamic Azad University
Country: Iran
Email: m.jamalvandi@iauksh.ac.ir

Author #2
Name: Moslem Amiri
Org: Islamic Azad University
Country: Iran
Email: amiri.moslem@iauksh.ac.ir

Other Author(s)
Contact AuthorAuthor #2
Alt Email: amiri.moslem@gmail.com
Telephone: 00989127995036
KeywordsSeismic excitation, Convection, Sloshing, FSI, Seismic isolation, Dynamic analysis
AbstractIn 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.
Paperview paper 5611.pdf (2450KB)

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