In the condition of the earthquake force and wind loads, there are many failure modes for the spherical tanks, such as the structure damage of the supports, uniform foundation settlement, displacement or upset, and the fracture of pipelines attached to the tank, etc. In this paper, more precise stress distribution of spherical tanks under wind loads and seismic force was obtained by finite element analysis. The safety assessment is carried out on a spherical tank. The weakness components of the spherical tank were found and the wind-proof performance and earthquake-proof performance of the spherical tanks could be improved.

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