Pinching in Steel Rack Joints: Numerical Modelling and Effects on Structural Response

Gusella, Federico; Orlando, Maurizio; Spinelli, P.

doi:10.1007/s13296-018-0095-x

Cited by 31 publications

(10 citation statements)

References 30 publications

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“…Several previous test campaigns on this issue have been reported [11,[22][23][24][25][26][27][28][29][30][31][32][33]. The most recent studies related to the presented research are listed and discussed next:…”

Section: State-of-the-art Of Testing Of Beam-to-upright Connectionsmentioning

confidence: 99%

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Ductility improvement of adjustable pallet rack speed-lock connections: Experimental study

Bové

Almansa

Ferrer

et al. 2022

Journal of Constructional Steel Research

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This paper presents seismic cantilever monotonic and cyclic tests of speed-lock (boltless) beam-to-upright connections of adjustable pallet rack systems; the objective of the monotonic tests is to obtain the bounds that are employed to define the loading protocol of the subsequent cyclic tests. The beam-to-upright connections consist of welding the beam to an intermediate end-plate (L-shaped) that, in its turn, is linked to the upright through a hooked assembly. The performed experiments investigate the connections hysteretic behavior, as it contributes to the rack lateral strength, stiffness, and ductility. More precisely, the main objective of this research is to propose a new strengthened design of the weld beads geometric configuration. This design is oriented for the connection failure not to arise in the weld, but the hooked assembly. This shift is expected to increase the connection ductility; in this sense, specimens with traditional and novel weld geometric designs are tested. In most of the tests performed, the results confirm that the new weld design leads to more ductile failure modes; preliminary evaluations state that the ductility increase might be sufficient to absorb most of the input seismic energy. On the other hand, tests are conducted according to two loading protocols: the traditional one by following European regulations and a new strategy proposed by Prof. Castiglioni accounting for the influence of gravity loads. Comparison between their results shows that the Castiglioni approach is more demanding and seems to reproduce the actual seismic behavior of racks better.

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Section: State-of-the-art Of Testing Of Beam-to-upright Connectionsmentioning

confidence: 99%

“…• [Gusella et al 2019]. This paper [33] presents an experimental and numerical study on pinching in the hysteretic behavior of steel rack joints; a numerical model considering the stiffness degradation is proposed. It is concluded that the role of pinching is relevant.…”

Section: State-of-the-art Of Testing Of Beam-to-upright Connectionsmentioning

confidence: 99%

Ductility improvement of adjustable pallet rack speed-lock connections: Experimental study

Bové

Almansa

Ferrer

et al. 2022

Journal of Constructional Steel Research

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“…Significant pinching is identified. • Gusella et al [46]. This document refers to an experimental and numerical study on pinching in the hysteretic behavior of steel rack joints; a numerical model considering the stiffness degradation is proposed.…”

Section: • Gilbert and Rasmussenmentioning

confidence: 99%

State-of-the-art review on adjustable pallet racks testing for seismic design

Almansa

Bové

Casafont

et al. 2022

Thin-Walled Structures

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“…The cyclic response of standard beam-to-column rack joints is remarked by a strong pinched behaviour. The typical relationship between the bending moment and the relative upright-beam rotation shows a considerable loss of stiffness after the first cycle [6,7,8]. Also the connections between uprights and building slab are characterised by a very limited degree of flexural stiffness and bending resistance.…”

Section: Seismic Features Of Pallet Racking Systemsmentioning

confidence: 99%

Seismic Devices for Steel Storage Structures

Simoncelli¹,

Tagliafierro²,

Montuori³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The importance of the logistics sector has increased even more in the last year, due to the Pandemic event which lead to an increasing of the online purchases. Goods and products are generally located in steel frames known as steel racks or simply racks. Consequently also the safe design of these structures, i.e. preserve their fully functionality and avoid their collapse, is becoming of paramount importance, especially when they are located in strong and moderate seismic zones. Despite pallet rack provisions for seismic loads have been significantly improved in the recent years, only two classic ways to enhance the seismic performance are considered: rack netting and structural strengthening. Both of these suggested solutions are not fully effective to preserve the integrity of the stored products that, when subjected to strong accelerations, can topple and fall down. The only reliable and effective systems seem to be the introduction of seismic devices, such as base-isolation and energy dissipation systems. Since no indications about these techniques are reported in the standards, many researches worldwide are trying to fill this gap. Unfortunately, up to now, just theoretical studies and very limited applications are available in literature. In the present paper a short overview on the base isolation systems available on the market for different steel storage rack typologies is presented highlighting main advantages and defects of each solution. COMPDYN 2021 8 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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Pinching in Steel Rack Joints: Numerical Modelling and Effects on Structural Response

Cited by 31 publications

References 30 publications

Ductility improvement of adjustable pallet rack speed-lock connections: Experimental study

Ductility improvement of adjustable pallet rack speed-lock connections: Experimental study

State-of-the-art review on adjustable pallet racks testing for seismic design

Seismic Devices for Steel Storage Structures

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