E. Axial compression (Columns: AISC 360)

Tekla Structural Designer
2021
Tekla Structural Designer

E. Axial compression (Columns: AISC 360)

If axial compression exists, the member is assessed for Flexural buckling and for Torsional and flexural torsional buckling. The compressive strength is determined in accordance with Equations E3.1 and E4.1. For double angles these equations are subject to the modifications of Section E6.

The member length or member sub lengths between braces are checked for:

  • Flexural buckling about major axis - for each sub-length between adjacent points of major axis lateral bracing and or torsional bracing.
  • Flexural buckling about minor axis - for each sub-length between adjacent points of minor axis lateral bracing and or torsional bracing.
  • Torsional and flexural torsional buckling - for each sub-length between adjacent points of torsional bracing (this check is not applied to hollow sections.)

For any sub-length, the required compressive force Pr is taken as the maximum compressive force in the relevant sub-length.

A warning is also issued if the slenderness ratio KL/r exceeds 200.

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