Round HSS Flexural Design per AISC 360-16 with ideCAD

Owned by
oğuzcan hadim
Last updated: Jan 25, 2024
1 min read

How does ideCAD calculate the flexural strength of round HSS according to AISC 360-16?

  • The flexural strength of steel elements is calculated automatically according to AISC 360-16.

  • The nominal flexural strength limit states yielding, and local buckling are controlled automatically according to AISC 360-16.

  • For design members for flexure, sections are automatically classified as compact, noncompact, or slender-element sections, according to AISC 360-16.

Symbols

D : outside diameter of round HSS, in. (mm)
E : Modulus of elasticity of steel = 29,000 ksi (200 000 MPa)
Fcr : Critical stress, ksi (MPa
Fy : Specified minimum yield stress of the type of steel being used, ksi
Mn : The nominal flexural strength
Mp : Plastic bending moment
S : elastic section modulus about the axis of bending, in.3 (mm3)
t = design wall thickness of HSS member, in. (mm)
Z = plastic section modulus about the axis of bending, in.3 (mm3)

The nominal flexural strength, Mn, should be the lower value obtained according to the limit states of yielding (plastic moment), and local buckling.

Yielding Limit State

Local Buckling Limit State

  • The limit state of local buckling does not apply to compact sections.

  • The nominal flexural strength, Mn, is calculated below for noncompact sections.

  • The nominal flexural strength, Mn, is calculated below for slender sections.