Abstract
The occurrence and magnitude of flange curling deflections in profiled cold-formed steel decking panels is investigated experimentally. The test panels examined were a roll-formed standing seam panel, and a brake-pressed trapezoidal panel. The test specimens were loaded in pure flexure and the load-response characteristics, and differential deflections of flanges relative to webs, were recorded for each specimen up to ultimate collapse. Estimates of flange curling deflections based on specifications contained within the Eurocode 3 (1993 draft) design standard are found to be comparable to experimentally determined deflections. A number of alternative curling models are developed and compared to the experimental curling behaviour. The effect of unrestrained longitudinal edges on curling deflections is determined and incorporated into the models.
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