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The structural failure of storage tank under internal overpressure mainly have two forms: uplift deformation and corner weld avulsion. And tank bottom is a sensitive position. A practical case of tank bottom deformation was detected in 2014. Based on this practical engineering case, tank bottom structure failure under the condition of internal overpressure on storage tank are analyzed. Then, the numerical simulation model of structural failure of tank bottom are established. The results of numerical simulation of crack propagation illustrated that the damage dissipation energy of crack propagation in the fillet weld is less than that of other location, namely the position of fillet weld is more possible to generate crack propagation. Therefore, it is necessary to do the periodic inspection of the fillet weld in tank bottom, which could find the crack in time and avoid further crack

The Research of Tank Bottom Structure Failure Based On Numerical Simulation