基礎地盤に部分的なタンク不支持領域を有する場合の円筒形石油貯蔵タンクの有限要素法による構造解析

概要

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The finite element structural analysis was made on a large cylindrical oil storage tank having a capacity of 125,000 kiloliters including the effects of interaction between the tank's structure and its foundation. At the analysis of the above tank, it was considered that the variation of the annular plate's thickness and the partially sinking condition of the foundation would have an effect on the stress occurred in the annular plate. From the results of the analysis, it has been found that the stress distribution in the vicinity of the shell-to-annular plate joint of the tank is sensitively influenced by the sinking position of the foundation. And also found that increasing of the thickness of the annular plate, the maximum stress occurring in the vicinity of the joint is reduced under any condition of the tank. These calculations were made by the computer program named NKSTSTAP (NK Storage Tank Structural Analysis Program).
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