The uplift phenomenon of a flat-bottom cylindrical shell tank is a long-term unsolved problem. In this study, uplift deformation of a tank bottom plate calculated by a numerical analysis performed by an explicit finite element analysis (refer to PVP2016-63916) and a hand calculating model based on Euler–Bernoulli beam theory are observed. First, this study analyzes the results of uplift displacement and uplift width calculated by the FE analysis. Then, the results of the relationship between the uplift displacement and the uplift width are observed. Moreover, comparing the results of the maximum uplift width of a thick bottom plate case and a thin bottom plate case, trends of the maximum uplift width that depends on the thickness of the tank bottom plate are obtained.

Seconds, this study tries to verify the hand calculating model based on Euler–Bernoulli beam theory. Compering the results of the deformation of the tank bottom plate calculated by the hand calculation and the FE analysis, accuracy of the hand calculating model is examined. The comparison implies that a large deformation behavior may appear in the deformation of the tank bottom plate. Therefore, a development of a hand calculating model of the deformation of a tank bottom plate taking into account geometrical nonlinearity may be necessary.


Uplift Deformation of the Bottom Plate of the Cylindrical Steel Tanks Under Steady-State Response of Tank Rocking Motion

Division / Sponsors: 
Pressure Vessels & Piping (PVP)


Paper Proceedings: https://asmedigitalcollection.asme.org/PVP/PVP2020/volume/83815

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