Seismic Response of Cylindrical Tanks for Oil

Abstract eng:
Seismic response of storage tanks storage anchored and unanchorage for oil, placed in high seismic risk zones of Mexico are studied. The growing need to satisfy the national oil industry has required the evaluation and retrofit of the existing structures, and new reservoirs for distribution of oil products. Therefore, this research has focused on the behavior, under seismic conditions, of steel storage tanks of large capacity, of 150 and 200 thousands barrels. From the revision, analysis and design criteria concerned with thin walls structures, it has been proposed and applied in this study a procedure based on a numeric modeling where the mechanical characteristic of the materials has been considered. The FEM has been used to carry out such analysis. Numeric analysis has been obtained for two conditions: empty tanks vibration and full tanks where fluid-structure interaction is employed to take into account the flexible walls; real seismic record of Subduction originated in the Mexican Pacific Ocean has been used by a time history analysis. Finally, the numerical and theoretical results obtained of the real structures are compared and it is considered to be used to determine new design of steel storage tanks, as well in the regulations environment in our country.

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