• Deepthi Stephen
• Asha Joseph

Vertical above ground steel tanks are employed in several industries to store water, oil, fuel, chemicals, and other fluids. Because of their geometric slenderness, steel tanks are prone to fail by buckling, and frequently this failure initiates in the form of elastic buckling. Interest in this study is due to failure of steel tanks in the cases of accidents or natural disasters with huge economic, environmental and social losses. The main objective is to investigate the buckling behaviour of steel tanks under static and dynamic loading conditions and to understand the various factors influencing buckling behaviour. Influences of aspect ratio, material and geometric non linearity on buckling characteristics of steel tanks were considered for the study. Buckling analysis of cylindrical anchored steel tanks with different aspect ratios (H/D) 0.43, 0.5, 0.6, 1.0, 1.5 under uniform external pressure and earthquake load were carried out using finite element analysis software ANSYS. Transient buckling analyses of the empty tank and liquid filled up to 90% of the height of the tank has been undertaken to examine the dynamic buckling behaviour of steel tanks. Study shows that the empty tanks are safe from the buckling consideration when subjected to earthquake loading whereas water filled tanks may buckle under the influence of any possible real world earthquake.

Steel tank, Buckling analysis, Aspect ratio, Nonlinear analysis, Time history analysis

"Investigation on Buckling Behaviour of Anchored Steel Tanks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 6, page no.13-22, June-2018, Available :http://www.jetir.org/papers/JETIR1806123.pdf

"Investigation on Buckling Behaviour of Anchored Steel Tanks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 6, page no. pp13-22, June-2018, Available at : http://www.jetir.org/papers/JETIR1806123.pdf