The buckling behaviour of shells is not widely known and simple procedures for analysis of buckling of shells are avaliable only to a very limited extent in design codes. Although AWWA D100 considers the buckling effects in itself, API 650 doesn't investigate any buckling behaviour of shell structure.

Storage tank designers must be consider the buckling behaviour due to self weight, vacuum load, wind load and seismic load effects on shell. At the present time, several papers or standars are avaliable :

• Det Norske Veritas: DNV-RP-C202 : Buckling Strength of Shells
• DIN 1880 Part 4: Structural Steelwork Analysis of Safety Against Buckling of Shells
• ASME Code Case N-284: Metal Containment Shell Buckling Design Methods, Miller C.D. 1991,

In my oppinion, DIN 1880 Part 4 has more practical solutions instead of others.