Load cases can be superimposed in a load combination (LC). A load combination combines the internal forces of the contained load cases, taking into account the factors.
If the member numbers and member locations x in the load cases are identical, the superimposed load case values are created according to the combination expression.
List
The "List" manages all the load combinations of the model. The List of Object Types table describes the buttons you can use to create, copy, or delete objects of a list.
No. and Load Combination Name
The number of a new load combination is preset, but can be changed. The order is irrelevant for the numbering. It does not have to be continuous, either; gaps in the numbering are allowed.
The "Load Combination Name" is a short description. It is based on the safety factors and numbers of the load cases, reflecting the combination rules.
To Solve
The "To Solve" check box controls whether the selected load combination is analyzed during the calculation.
Assignment
In the Assignment tab, you can check the load cases that are included in the load combination and according to which criteria they are combined. In the "Assigned for CO" column, the load cases with corresponding factors are shown for the load combination selected in the list.
Defining Load Combination
Use the
button at the bottom of the "List" to create a load combination.
The "Existing Load Cases" column lists all the load cases you have created. To transfer a load case to the "Assigned for CO" list, use the following options:
- Double-click the load case.
- Select the load case or several load cases by holding down the [Ctrl] key. Then, click the
button.
To change the factor of a load case, activate the first column of this load case row. Enter the correct factor, or select it from the list.
In the "Syntax input" dialog section, you can define the load combination directly by entering load cases including coefficients. Then, assign the definition criterion with the
button.