Abstract
This paper deals with the torsion analysis of steel members with thin-walled open cross section. The attention is paid mainly to the determination of resulting stresses accenting the different methods of their determination. Three basic approaches are discussed, namely the Vlasov's theory of thin-walled elastic members, the method based on modified bending and torsion analogy and the simplified method supplying the torsion by the effect of couple of forces. On the illustrative example the effect of torsion at steel crane girder has been analyzed using the confrontation of the aforesaid methods. Also some general notes and comments to the problem of torsion analysis and design of steel members are included.
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