Abstract
Thin-walled cold-formed profiles have specific specialties, which must responsibly have their design taken into account. Local stability requirements related to unfavourable buckling effects of their compressed parts are highly significant. Favourable effects, related to membrane stresses and post-critical behaviour are also important. The paper deals with the influence of initial imperfections and presents fundamental information about experimental and theoretical-numerical research to determine the load-bearing capacity of thin-walled cold-formed compressed steel members. The investigated members consist of closed cross-sections. The theoretical-numerical analysis has been oriented towards the investigation and modelling of initial imperfection effects, caused by production processes, on the load- bearing capacities of the mentioned members. The experimental investigation has been realized to verify the theoretical results and to investigate the behaviour of these members during the loading process.
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