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Interaction Between Pallets and Pallet Beams of Steel Storage Racks in Seismic Areas

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Abstract

Steel storage racking systems are heavily loaded light structures that need special attention in design. The problems increase for racks in seismic regions, where the structure is subjected additionally to high lateral forces. This paper focuses on the seismic design of pallet beams in pallet racking systems and concentrates on three issues in order to verify or improve rules of European Codes on racks: (1) the horizontal seismic forces on the pallet beams, (2) the developing horizontal bending moments and (3) whether the buckling length of the beams on the horizontal plane may be reduced due to a potential diaphragmatic action, offered by the pallets. Investigations are based on theoretical and numerical analyses. It was found that opposite to the Code provisions the lateral seismic forces are not equal distributed between the pallet beams and, confirming field observations, that the forces directed towards the outside of the rack are higher compared to those directed towards the inner side. Concerning the horizontal bending moments appropriate correction coefficients were proposed that deviate from the codified values. Finally, it was found that pallet friction does not affect so much the buckling length to safely reduce its buckling length.

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Acknowledgements

This research was partly financially supported by the EU, within the project “Seismic behavior of steel storage pallet racking systems” (SEISRACKS2), Grant agreement RFSR-CT-2011-00031. The other partners of the project were Politecnico di Milano, Italy (coordinator), University of Liege, Belgium, RWTH Aachen, Germany, NTUAthens, Greece NEDCON, Netherlands, MODULBLOCK, Italy, STOW International, Belgium, FRITZ SCHÄFER, Germany, SCL Ingegneria Strutturale, Italy and Computer Control Systems, Greece.

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Authors and Affiliations

  1. Institute of Steel Structures, National Technical University of Athens, Iroon Politexneiou 9, 15780, Zografos, Greece

    Konstantinos Adamakos & Ioannis Vayas

  2. SCL Ingegneria Strutturale, Via Carissimi, 12, 20124, Milan, Italy

    Stefano Sesana

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  1. Konstantinos Adamakos
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  2. Stefano Sesana
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  3. Ioannis Vayas
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Correspondence to Konstantinos Adamakos.

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Adamakos, K., Sesana, S. & Vayas, I. Interaction Between Pallets and Pallet Beams of Steel Storage Racks in Seismic Areas. Int J Steel Struct 18, 1018–1034 (2018). https://doi.org/10.1007/s13296-018-0041-y

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  • DOI: https://doi.org/10.1007/s13296-018-0041-y

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