Verification of axial stress in solid cross-sections

The axial stress in the cross-section may be caused by axial force N, bending moments M_y, M_z and bimoment B. The combination of these forces and moments is verified.

The verification without consideration of buckling and lateral torsional buckling is done according to the following expression for the classes 1 and 2:

The expression for the class 3:

The expression for the class 4:

Where is	*N_θ,Rd*	The tensile resistance N_t,Rd or resistance in plain compression N_c,Rd
	M_c,Rd,y, *M_c,Rd,y*	The bending resistance about the axes y and z
	*B_Rd*	The resistance for stresses due to the bimoment
	e_Ny, *e_Nz*	The difference between centres of gravity for total and effective cross-sections in directions z and y

If the shear verification fails for particular directions y and z, the value 1.0 is used for corresponding direction in equations described above.

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