Abstract
The 2003 Tokachi-Oki Earthquake caused severe damage to oil storage tanks due to liquid sloshing. Six single deck floating roofs have experienced structural problem as evidenced by sinking failure in large diameter tanks at Tomakomai refinery. The pontoon of the floating roof may be buckled due to circumferential bending moment during sloshing. This paper presents the buckling strength of the pontoon using axisymmetric shell finite element analysis. Linear elastic bifurcation buckling analysis is carried out.
