1. Special features of thin elements
1.1 Definition of this class
Two aspects of behavior lead to the qualification of a structural element as "thin":
under compression: the element is considered "thin-walled" when, under compression, some of its parts are susceptible to local instability before the elastic limit is reached. Such instabilities include wall buckling, instability due to cross-section distortion (buckling of stiffeners) and local crushing on supports;
under the effect of torsion: the element is considered "thin-walled" when, under the effect of torsion alone, the normal stresses created by torsion in the section are no longer negligible. This situation arises for a load applied outside the shear center, when each of the three...
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Special features of thin elements
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