円筒タンク側板下部張り出しの発生条件 : 大形模型タンクの実験結果との比較

概要

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During an earthquake, damage caused by the large deformation of shell plates, which is called "Elephant Foot Bulge(E.F.B.)", is observed at the bottom course of storage tanks. From the view point of the plastic collapse of the shell plate, a simplified but effective calculation method for the initiation condition of E.F.B. is developed. The initiation of E.F.B. is calculated from the stresses in the tank shell due to the internal pressure and the axial force, applying the full plastic condition. The calculation results are compared with the shaking test results of a large scaled model tank which is 10m in diameter and 6.9m in height. The calculated stress distribution of the shell plate before the bulge, are in good agreement with those of the test results. And the calculated full plastic condition is also in good agreement with the initiation of E.F.B. in the test.
一般社団法人日本機械学会の論文
1985-11-25