Three-Dimensional Nonlinear Dynamic Analysis of Base Isolated Cylindrical Steel Tank

Failure of a tank during an earthquake can result in significant financial, human, and environmental losses. Thus, their lack resiliency against strong earthquakes may refinery disruption. This has the potential to have considerable impact on any economic system. As result, more research into seismic performance structures is required attain highest possible level resistance earthquakes. In this paper, we aim look installation isolation systems cylindrical steel storage tanks. A nonlinear 3D finite element model developed with ANSYS software. Moreover, wall material nonlinearity, fluid-structure-interaction, sloshing components are considered. The bilinear hysteretic LRB used for modal time-history analysis. work, three tanks varying aspect ratios studied: "Model A", B", C". Furthermore, fixed tank's fundamental frequencies were compared analytical results American API 650 Standard. Subsequently, dynamic behavior response researched horizontal component El-Centro 1940 PGAs 0.34g 0.5g investigated. dominating frequency system within effective range seismically isolated systems. illustrate that base limits movement large displacement isolators; mode shape cantilever beam all circumstances. total reduction slender greater as broad case base-isolated increases increase ratio. Additionally, device eliminates buckling at top shell excitation (elephant foot diamond buckling). It be concluded technique reducing ground-supported tanks, particularly taller Doi: 10.28991/CEJ-2022-08-06-013 Full Text: PDF