Check of bending with lateral torsional buckling

 

Image NB 3.1. - Values description and symbol convention during loading by F_z

(C) - compression fibers, (T) - tension fibers, S - shear center, G - center of gravity

Image NB 3.2. - Symetric cross sections - symetric to center or to the stiff axis

Table NB 3.1. - Coefficient values C₁ and C₃ when member is loaded by end moments dependent on  coefficients k_z and coefficients y_f and k_wt

remark 1)

remark 2) 0,7L = fixed left end, 0,7R = fixed right end

 

Table NB 3.2. - Coefficient values C_1, C₂ and C₃ for different cases of perpendicular loading, dependend on coefficients k_y, k_z, k_w and coefficients y_f and k_wt

remark 1)

remark 2) Parameter ψ_f is for the center of the length

remark 3) Values of critical moment M_cr is for the section with M_max