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Design of Members for Bending Moment and Axial Force

Notations

NEd: Design norma] force

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

MEd: Design bending moment

My, Rd : Design values of the resistancc to bending moments, y-y
Mz, Rd : Design values of the resistance to bending moments, z-z axis

hw: depth of a cross section

tw: web thickness

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

Ϭx,Ed: Design value of the local longitudinal stress

YMO : Partial factor for resistance of cross-sections whatever the class is
YMI : Partial factor for resistance of members to instability assessed by member checks
YM2 : 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 MN,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,


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