Steel Beam Design Settings
Steel Beam Design Settings are explained in detail under this title.
Design Settings Sub-Tabs
After the steel beam modeling is completed, double click on the element to enter its properties.
3 new sub-tabs will appear in the steel beam 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 |
Deflection limit | It is the member-based limit value specified in the relevant Steel Structures regulation used in the design. The program does not automatically change the limit such as cantilever beams. The limit value must be changed by the user according to the situations where the beam is used. |
Determine span with respect to unbraced length | The length between the two elements to which the relevant element is attached or seated is the use of the clear distance in deflection calculation. It is preferred in hinged connections. |
Determine span with respect to the moment diagram | The equation used in deflection calculation changes according to the shape of the moment diagram of the relevant element. |
Take span as length of the member | It provides deflection calculation over the full length of the relevant element. |
Control is given in the steel design - beam - details section after analysis and design.
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