The design of steel members for Compression per EN 1993-1-1 is explained in detail under this title.
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Notations
Nb,rd= the design buekljng buckling resistance of the compression member
ꭓ = the reduction factor for the relevant buckling mode
α= imperfection factor
Ncr = the elastic critical force for the relevant buckling mode
λ= the in-plane non-dimensional slenderness
fy= yield strength
A = cross-section area
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Uniform Members in Compression
First of all, local buckling control should be done. The calculation is made according to whether the elements are delicate or delicate. Classification of cross sections is automatically determined according to 5.4. Classification of cross sections per EN 1993-1-1
There are two different equations depending on classification of cross sections. Eq. 6.47 is for class 1,2, and 3 and Eq. 6.48 is for class 4.
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