Influence of Heterogeneous Foundation on the Safety of Inverted Cone Bottom Oil Storage Tanks under Earthquakes

In order to study the mechanical properties of inverted cone bottom oil storage tanks under earthquakes when foundation is uneven, finite element modeling calculation for a 20,000 m3 tank carried out based on ANSYS Workbench. Wind load, hydraulic pressure and seismic load are all equalized as distributed loads with varying spatial positions. Considering various combinations different heterogeneous foundations loads, by adjusting preset bed coefficient, final coefficient maximum settlement value equivalent stress floor reaches yield strength conditions calculated. The results show that condition stiffness considering action, local higher than natural silty clay, requirement safe use can be met. Among seven simulated forms, form high windward side has great influence safety tanks.