文档介绍：Thin-Walled Structures 48 (2010) 935–945
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Thin-Walled Structures
journal homepage: ate/tws
Challenges in putation of lower-bound buckling loads for tanks under
wind pressures
Eduardo M. Sosa a, Luis A. Godoy b,n
a Department of Civil and Environmental Engineering, West Virginia University, . Box 6103, Morgantown, WV, USA
b CONICET and Structures Department, FCEFyN, Universidad Nacional de Co´rdoba, Casilla de Correo 916, Co´rdoba 5000, Argentina
article info abstract
Article history: This paper reports on the implementation of a lower-bound approach for the buckling of imperfection-
Received 26 April 2010 sensitive shells using general purpose finite element codes. The stability of cylindrical steel tanks under
Received in revised form wind pressure is evaluated for two tank configurations: conical roof tanks and open top tanks. For both
30 June 2010 tank configurations, several geometric relations are considered in order to find the variation of the
Accepted 30 June 2010
knock-down factor as the geometry changes. The reduced energy method is implemented pute a
Available online 23 July 2010
lower-bound for critical wind pressures and the results pared with the static non-linear analysis
Keywords: carried out on the same models. An alternative way to implement the reduced energy method is
Buckling presented to improve the results obtained with the proposed methodology.
Non-linear analysis
& 2010 Elsevier Ltd. All rights reserved.
Reduced energy method
Tanks
Wind pressure
1. Introduction of the most interesting approaches oriented to shell design has
been the lower bound theory based on a reduced-energy model of
Large thin-walled tanks are employed by various industries to the shell developed by Croll and co-workers [10–14]. In the
mainly store oil, water and petrochemical products. During reduced-energy approach it is important to identify the energy
weather events involving high wind speeds