Distortional Influence of Pallet Rack Uprights Subject to Combined Compression and Bending

Bonada, J.; Pastor, M.M.; Roure, Francesc; Casafont, Miquel

doi:10.1016/j.istruc.2016.05.007

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…The influence of web opening on the lateral-torsional buckling behaviour of CFS channel-section purlins was also examined by Ling et al [18] using finite element method. More recently, extensive research has been carried out on the load bearing capacity of rack uprights subjected to combined axial and bending loads using different analysis methods, including design codes [19], experimental [20] and finite element numerical [21][22][23] methods.…”

Section: Introductionmentioning

confidence: 99%

Distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web

Yuan

2017

International Journal of Mechanical Sciences

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This paper presents the numerical and analytical investigations on the distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web. The numerical investigation involves the use of finite element methods. In the analytical analysis the distortional buckling model recommended in EN1993-1-3 is employed. The influence of the web holes on the distortional buckling behaviour and corresponding critical stress and moment of perforated cold-formed steel channel-section beams are discussed. Finally, a simple analytical formulation is proposed for evaluating the effect of hole size on the reduction of critical stress and critical moment of the channel-section beams with circular holes in web.

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Section: Introductionmentioning

confidence: 99%

Distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web

Yuan

2017

International Journal of Mechanical Sciences

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“…= � , , � where is the reduction factor for distortional buckling , is the distortional effective area [7] is the reduction factor for flexural-torsional buckling…”

Section: En 15512 Approachmentioning

confidence: 99%

“…Bonada et al [7] have investigated the distortional influence of racks under compression and constant bending about the axis of symmetry. The study includes experimental tests and FEA done in two ways: i) by introducing an initial geometric imperfection, and ii) by including residual stresses and strain hardening.…”

Section: Introductionmentioning

confidence: 99%

07.14: Rack uprights under combined compression and bi‐axial bending: Experimental testing, numerical analysis and European standard approach

et al. 2017

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Pallet rack uprights are thin-walled mono-symmetric perforated open steel cross-sections subject to combined axial compression and bending. Loads (pallets of goods to be stored) are transmitted to uprights through the beams and the beam-upright connections. Bending about the major axis (cross aisle direction) is induced to the upright by the eccentricity of the beam end plate and the moment transmitted by the semi-rigid beam to upright connection. The bending about the minor axis (downaisle direction) is induced by eccentricity of the axis of the beam and the axis of the upright. The nature of these components, with perforations and buckling failure modes, together with combined actions, is a challenge in structural design. The main objective of this investigation is to provide a comprehensive empirical, numerical and analytical analysis of how bending combined with axial compression influences in the design load of pallet rack uprights. This paper presents experimental tests performed on uprights under combined compression and bending, and the FEA including nonlinear geometric and material behaviour. Both results are compared to the current European Standard, EN 15512, for Steel static storage systems. One type of cross section has been analysed, with a length that can produce different type of failure modes, mainly local and distortional buckling. The uprights have been analysed with different axial -bending combinations, which cover the field of combinations possible in the real load conditions of the rack.

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“…Steel storage racks play a critical role in the popularity of online shopping. At present, the research on steel storage racks mainly focuses on the structural performance of steel storage racks' members and components such as uprights [1][2][3][4][5], joints [6][7][8][9][10][11][12][13], and frames [14][15][16][17]. Typically, these investigations assume that the effects of the center of gravity and eccentricity of the load are disregarded.…”

Section: Introductionmentioning

confidence: 99%

Load Distribution Optimization of Steel Storage Rack Based on Genetic Algorithm

Deng

Niu²,

Yin³

et al. 2022

Buildings

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The distribution of load has high uncertainty, which is the main cause of a rack structure’s instabilities. The objective of this study was to identify the most unfavorable and favorable load distributions on steel storage racks with and without bracings under seismic loading through a stochastic optimization—a genetic algorithm (GA). This paper begins with optimizing the most unfavorable and favorable load distributions on the steel storage racks with and without bracings using GA. Based on the optimization results, the failure position and seismic performance influencing factors, such as the load distributions on the racks and at hazardous positions, are then identified. In addition, it is demonstrated that the maximum stress ratio of the uprights under the most unfavorable load distribution is higher than that under the full-load normal design, and it is not the case that the higher the center of gravity the more dangerous the steel storage rack is, demonstrating that the load distribution pattern has a significant impact on the structural safety of steel storage racks. The statistics of the distributions of the load generated during the optimization of the GA and the contours of the probability distributions of the load are generated. Combining the probability distribution contours and the GA’s optimization findings, the “convex” distribution hazard model and the “concave” distribution safety model for a steel storage rack with bracings are identified. In addition, the features of the distribution hazard model and the load distribution safety model are also identified for steel storage racks without bracings.

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Distortional Influence of Pallet Rack Uprights Subject to Combined Compression and Bending

Cited by 15 publications

References 15 publications

Distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web

Distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web

07.14: Rack uprights under combined compression and bi‐axial bending: Experimental testing, numerical analysis and European standard approach

Load Distribution Optimization of Steel Storage Rack Based on Genetic Algorithm

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