Storage racks in seismic areas
The Seisracks project focuses on the seismic design of pallet racking systems, of the type frequently used in commercial areas open to the public. These structures are made of cold-formed thin-walled open cross-section profiles, with holes and openings to allow mechanical connections between members and rapid reconfiguration. In addition to usual local and global limit states, during an earthquake an additional limit state is represented by the sliding and fall of the pallets. At present in Europe there is no officially accepted design code for racks in seismic areas, but only the 2005 version of FEM10.2.08 (not EN). Beam-to-upright and base-plate connections were tested to characterise their behaviour. Full-scale pushover, pseudo-dynamic and dynamic shaking-table tests were performed for assessment of the actual structural response and ductility, leading to definition of possible Q factor values. Assessment of the static and dynamic friction factor was achieved through full-scale sliding tests considering different types of beams and pallets. A warehouse was continuously monitored for two years, recording accelerations caused by forklifts' accidental impacts on the structure. A numerical model including pallet sliding simulation capability was set up, allowing numerical parametric analysis of racks under seismic loading. The main outcome of the Seisracks project is a revised version of FEM10.2.08, which will lead to a more uniform quality standard in design of racks in seismic areas.
Bibliographic Reference: EUR 23744 EN (2009), 142 pp. Euro: 20
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=KINA23744 (Catalogue Number: KI-NA-23744-EN-S)
ISBN: ISBN: 978-92-79-11203-4
Record Number: 200910473 / Last updated on: 2009-10-12
Original language: en
Available languages: en