In the Base tab, you can assign the analysis types and define additional parameters. To do this, select the load case in the "list" on the left.
Categories
This section covers the basic settings for a time history analysis of the load case.
Analysis Type
Once you have activated the "Time History Analysis" add-on in the model's Base Data, both analysis types Time History Analysis | Accelerogram and Time History Analysis | Time Diagram are available in the list. Assign one of these analysis types to each load case for which you want to perform the time history analysis.
Time History Analysis Settings
In the list of "Time History Analysis Settings" (THS), select the specifications used for the analysis of the load case. For example, this concerns the combination expression or damping. These parameters are described in the chapter Time History Analysis Settings.
Use the
button to add new time history analysis settings and the
button to edit the selected settings.
Importing Modal Analysis from Load Case
This option is displayed if you have selected the "Linear Modal" solving method in the Time History Analysis Settings. In the list of defined modal analysis load cases, specify which eigenvalue analysis should form the basis of the time history analysis.
Import masses only from load case / combination
This option is displayed if you have selected the "Linear implicit Newmark analysis" solving method in the Time History Analysis Settings. In the list of the defined load cases and combinations, specify which loading is to be considered as a mass in the time history analysis.
Action Category
The definition of the action category is only possible for load cases of the Time History Analysis | Time Diagram analysis type. Load cases of the "Time History Analysis | Accelerogram" type are automatically assigned to the "Seismic actions (AE)" category.
Options
You can access the "Structure modification" check box if you have selected the "Linear implicit Newmark analysis" solving method in the Time History Analysis Settings. It opens the option to consider a stiffness adjustment or a special treatment of nonlinearities in the load case (see the chapter Structure Modifications of the RFEM manual). Select the appropriate structural modification in the list, or create a new modification type using the
button.
If you have specified the "Linear Modal" solving method in the Time History Analysis Settings, the settings of the corresponding modal analysis load case will be used.