Abstract
Powerful tsunami attacked to the northeast coast of Japan due to the Great East Japan Earthquake occurred on March 11, 2011. Some aboveground oil storage tanks (ASTs) were subjected to external pressure due to the tsunami. Wind giarders are installed to the shell plates in AST for the prevention of buckling by wind pressure. Although many researches on the buckling of ASTs or cylinder shells concerning tsunami were made, the effect as reinforced rings of the wind guarders was not taken into consideration in them. This paper presents the bifurcation buckling of shell plates in 10,000 m3 AST under both internal and external liquid pressure using the axisymmetric shell finite element method. The buckling external liquid height of AST with wind girder is compared with that without wind girder. As a result, the effect of the wind girder on buckling liquid pressure is small.
