ABSTRACT
The unavoidable complexity of a code for aluminium structures is essentially down to the nature of the material itself, which involves the solution of difficult problems and demands careful analysis. The innovative element of Eurocode 9 relates to introduction, for the first time in a structural aluminium code, of analysis of inelastic behaviour from the cross-section up to the structure as a whole. The following basic types of thin-walled elements are identified in the classification process: flat outstand element; flat internal element; and curved internal element. The effect of local buckling on each compression element of the cross-section shall be conventionally accounted for by replacing the non-uniform distribution of stress, arising in the post-buckling range, with a.
