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Structural Engineering and Mechanics Volume 13, Number 5, May 2002 , pages 533-542 DOI: https://doi.org/10.12989/sem.2002.13.5.533 |
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Imperfection sensitivity to elastic buckling of wind loaded open cylindrical tanks |
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Godoy LA, Flores FG
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| Abstract | ||
| This paper considers the buckling and post-buckling behavior of empty metal storage tanks under wind load. The structures of such tanks may be idealized as cantilever cylindrical shells, and the structural response is investigated using a computational model. The modeling employs a doubly curved finite element based on a theory by Simo and coworkers, which is capable of handling large displacements and plasticity. Buckling results for tanks with four different geometric relations are presented to consider the influence of the ratios between the radius and the height of the shell (R/L), and between the radius and the thickness (R/t). The studies aim to clarify the differences in the shells regarding their imperfection-sensitivity. The results show that thin-walled short tanks, with R/L = 3, display high imperfection sensitivity, while tanks with R/L = 0.5 are almost insensitive to imperfections. Changes in the total potential energy of tanks that would buckle under the same high wind pressures are also considered. | ||
| Key Words | ||
| buckling, cylindrical shells, finite elements, postbuckling, tanks, total potential energy, wind load | ||
| Address | ||
| Godoy LA, Univ Puerto Rico, Dept Civil Engn, Puerto Rico, PR 00681 USA Univ Puerto Rico, Dept Civil Engn, Puerto Rico, PR 00681 USA Natl Univ Cordoba, Struct Dept, Cordoba, Argentina | ||