Challenges in the computation of lower-bound buckling loads for tanks under wind pressures

Sosa, Eduardo M.; Godoy, Luis A.

doi:10.1016/j.tws.2010.06.004

Cited by 32 publications

(11 citation statements)

References 16 publications

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“…12. This convergence of REA to higher knock-down factors than GNIA remains as a challenge to the REA, and, as reported by [48], the problem has not been solved at present.…”

Section: Application Of Reamentioning

confidence: 97%

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A penalty approach to obtain lower bound buckling loads for imperfection-sensitive shells

Godoy

Jaca

Sosa

et al. 2015

Thin-Walled Structures

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“…12. This convergence of REA to higher knock-down factors than GNIA remains as a challenge to the REA, and, as reported by [48], the problem has not been solved at present.…”

Section: Application Of Reamentioning

confidence: 97%

“…LBA and GNIA studies under wind pressureThis problem was originally solved in Ref [51]. and results of Ref [48]. are reported next.…”

mentioning

confidence: 96%

A penalty approach to obtain lower bound buckling loads for imperfection-sensitive shells

Godoy

Jaca

Sosa

et al. 2015

Thin-Walled Structures

Self Cite

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“…The essence of this approach was the neglecting of the membrane contribution to the stiffness matrix. In a follow-up paper, Sosa and Godoy [14] developed an implementation of this lower-bound approach for the buckling of imperfection-sensitive shells. They considered cylindrical tanks with conical roofs and with open tops, and arrived at some knock-down factors for various values of H=D ratios of the tank.…”

Section: Buckling Of Vertical Cylindrical Tanksmentioning

confidence: 99%

Liquid-containment shells of revolution: A review of recent studies on strength, stability and dynamics

Zingoni

2015

Thin-Walled Structures

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“…Innovative ways of strengthening and improving buckling capacity have been proposed [15]. Sosa and Godoy [16] and Burgos et al [17] have recently taken a turn towards analytical methods, in order to improve buckling evaluation by proposing new methodologies.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation on shell buckling of empty thin-walled steel tanks under wind load according to current American and European design codes

Maraveas

Balokas

Tsavdaridis

2015

Thin-Walled Structures

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Liquid storage steel tanks are vertical above-ground cylindrical shells and as typical thin-walled structures, they are very sensitive to buckling under wind load, especially when they are empty or at low liquid level. Previous studies revealed discrepancies in buckling resistance of empty tanks between the design method proposed by the American Standard API 650 and the analytical formulas recommended by the European Standard EN1993-1-6 and EN1993-4-2. This study presents a comparison between the provisions of current design codes by performing all types of numerical buckling analyses recommended by Eurocodes (i.e. LBA-linear elastic bifurcation analysis, GNAgeometrically nonlinear elastic analysis of the perfect tank and GNIA-geometrically nonlinear elastic analysis of the imperfect tank). Such analyses are performed in order to evaluate the buckling resistance of two existing thin-walled steel tanks, with large diameters and variable wall thickness. In addition, a discussion is unfolded about the differences between computational and analytical methods and the conservatism that the latter method imposes. A sensitivity study on the geometric imperfections and the boundary conditions is also conducted. Investigation on the boundary conditions at the foot of the tank highlights the sensitivity to the fixation of the vertical translational degree of freedom. Further, it is indicated that the imperfection magnitude recommended by the EN1993-1-6 is extremely unfavorable when applied to large diameter tanks. Comments and conclusions achieved could be helpful in order to evaluate the safety of the current design codes and shed more light towards the most accurate one.

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Challenges in the computation of lower-bound buckling loads for tanks under wind pressures

Cited by 32 publications

References 16 publications

A penalty approach to obtain lower bound buckling loads for imperfection-sensitive shells

A penalty approach to obtain lower bound buckling loads for imperfection-sensitive shells

Liquid-containment shells of revolution: A review of recent studies on strength, stability and dynamics

Numerical evaluation on shell buckling of empty thin-walled steel tanks under wind load according to current American and European design codes

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