Modal identification of storage racks for cheese wheels

During the Emilia-Romagna earthquake (2012), a great number of steel racks used to store cheese wheels collapsed, causing non-negligible damage Italian economy. Therefore, for similar structures that survived and are in service, deep investigation towards assessment their effective safety is required. In seismic analysis these frames, mechanical constraint acting onto due reinforced concrete sidewalls, possible nonlinearities exhibited by base-plate joints in-plane restraint provided wooden boards connects adjacent columns should be carefully modelled ensure realistic design results. paper, an experimental activity, based on suitable modal identification techniques, presented capture dynamic behaviour peculiar structures. The scope collect data useful calibrate numerical finite element models order accurately define aforementioned unknown parameters. Furthermore, few ideal restraints herein discussed stressing out differences terms expected static response.