Design Settings Sub-Tabs

  • After the steel column modeling is completed, double click on the element to enter its properties.

  • 3 new sub-tabs will appear in the steel column menu. These tabs contain adjustments for analysis and design.

ASCE 7-16

  • If a click is placed in the box on the ASCE 7-16 sub-tab, it is made with the vertical design spectrum in accordance with 11.9 and Ev is determined to calculate of the vertical earthquake effect.

Releases / Partial Fixity

  • In the Releases tab, end releases and spring values ​​are entered at the starting and ending points of the element. For this process, it must be activated by clicking the 'Override end releases' box at the top of the tab.

1

If the axial force for the starting point of the element 2-direction shear force, 3-direction shear force, torsion, 2-direction moment and 3-direction moment are indicated, the corresponding force will be 0 at the starting point.

2

For the end point of the element, axial force, 2-direction shear force, 3-direction shear force, torsion, 2-direction moment and 3-direction moment are indicated, the corresponding force will be 0 at the starting end.

3

The spring coefficient is entered for the starting point of the element. Units can be changed by clicking the right button in the box.

4

Spring coefficient is entered for the end point of the element. Units can be changed by clicking the right button in the box.

Design

  • The parameters used in the design are intervened in the Design tab. If a mark is placed in the box, the coefficient written in the box is used in the design. If no mark is placed in the box, the programme automatically determines these coefficients and uses them in the design.

K Major

Effective length factor for major axis

K Minor

Effective length factor for minor axis

Unbraced length ratio (Major)

The ratio of the length between two elements connected to the element in its strong direction to the entire element length

Unbraced length ratio (Minor)

The ratio of the length between two elements connected in the weak direction to the entire element length

Laterally unbraced length ratio(LTB)

The ratio of the length between laterally unbraced length along either flange

The lateral-torsional buckling modification factor (Cb )

Lateral-torsional buckling modification factor for nonuniform moment
diagrams when both ends of the segment are braced. It’s determined according to AISC 360-16 F1-1.

  • Control is given in the steel design - column - details section after analysis and design.