September 2008Department of structural engineering55 EC5 - nonlinear approach L e Geometric imperfection in the shape of the 1st buckling mode e = L / 400 (EC5 suggests L / 500) For E = 12000 Mpa P E = 304,7 kN for L = 4 m P E = 135,4 kN for L = 6 m
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