Design of Members for Bending Moment and Axial Force

Notation

N_Ed: Design norma] force

N_pl,Rd: Design plastic resistancc to normal forces of the gross cross-section

M_Ed: Design bending moment

M_{y, Rd} : Design values of the resistancc to bending moments, y-y
M_{z, Rd} : Design values of the resistance to bending moments, z-z axis

h_w: depth of a cross section

t_w: web thickness

f_y: Strength of axial compressive force available according to Section E

Ϭ_x,Ed: Design value of the local longitudinal stress

Y_MO : Partial factor for resistance of cross-sections whatever the class is
Y_MI : Partial factor for resistance of members to instability assessed by member checks
Y_M2 : Partial factor for resistance of cross-sections in tension to fracture

6.2.9 Bending and Axial Force

6.2.9.1 Class 1 and 2 cross sections

For class 1 and 2, interaction of axial force and bending moment is considered according to Eq. 6.32.

• For a rectangular solid section without fastener holes M_N,Rd

• There is no interaction if the belowed equations are satisfied for doubly symmetrical I and H sections.

• There is an interaction if the belowed equation is satisfied for doubly symmetrical I and H sections

6.2.9.2 Class 3 cross sections

The maximum longitudinal stress should satisfy Eq. 6.42.

6.2.9.3 Class 4 cross sections

The maximum longitudinal stress should satisfy Eq. 6.43.

Alternatifly,