Bent metal components - Limit states, sizing criteria

After an introduction to the design and sizing of metal components and study tensioned and compressed metal components , we are interested here in bent metal components with :

• "Description and schematic";

• [C 2 553] "Limit states and dimensioning criteria" ;

• "Assemblies" ;

• "Design";

• "For further information".

This second article begins with the description and modeling of form instabilities — local warping, buckling, tilting, etc. — which prevent certain bent components from fully mobilizing their elastic or plastic resistances. The criteria needed to avoid these modes of failure, such as those of EC 3-DAN, must be based on a large number of test results, since the occurrence of form instability depends very much on the level of geometric imperfections introduced into components during their manufacture.

When dimensioning a beam, it is essential to ensure that all risks of disorder are eliminated, by applying the appropriate criteria of EC 3-DAN.