To start the export from Revit to RFEM, click the button
Modell exportieren in der Multifunktionsleiste von Revit gestartet (siehe Bild
Add-in in Revit Ribbon
).
A dialog box appears where you can enter the specifications important for the data transfer to RFEM. The dialog box consists of two tabs.
General Settings
Im Register 'Allgemeine Einstellungen' treffen Sie grundlegende Vorgaben für den Export der Daten.
Z-Direction
Here, you can specify the orientation of the global Z-axis in an RFEM model.
RFEM
Select whether you want to "Create new model" or "Overwrite existing model" for the export to RFEM.
Model Type
In Revit, a model consists of physical elements. This physical model is usually not a valid mechanical model. The export to RFEM requires an analytical model that needs to be generated by Revit first.
If you export an analytical model, all objects with an analytical model stored are transferred. Analytical elements without an associated physical element are also exported. The material and cross-section information is read out of the analytical elements. However, eccentricities from the physical model are not transferred.
If you export a physical model, only the analytical objects linked to a physical element are transferred. The material and cross-section information is read out of the physical elements. This also takes into account the eccentricities from the physical model.
If you export the analytical and physical model, the same elements are transferred as in the case of exporting the analytical model; the only difference is that the eccentricities as well as the material and cross-section information are transferred from the physical model for all analytical elements linked to this physical model.
Objects to Transfer
This section provides the option to export a partial structure only. You can control the objects to be transferred in Revit using selections or visibilities.
The "Only members and surfaces" option allows you to only export the main objects (beams, columns, slabs). Joints or support definitions are not taken into account. Any incomplete or incorrect definition in Revit will be ignored.
Options
The "Consider member eccentricities" and "Consider surface eccentricities" options allow you to control whether to automatically generate eccentricities in the RFEM model. They result from the offset of the analytical line or surface to the center of gravity of the physical object in Revit.
If you "Export member hinges without degrees of freedom", RFEM creates "empty" hinges on all RFEM members that do not get any specific hinge information from Revit. Thus, the members are rigidly connected.
With the "Use cross-section name from "Dlubal name" parameter" option, the cross-section conversion is done using the defined Dlubal parameters.
"Add name to comment" documents the material or cross-section names used in Revit in the associated RFEM comments.
Structural Settings
In the Structural Settings tab, you can specify how to transfer the foundations into RFEM.
In RFEM, there are no specific foundation objects, only simple supports. The objects of the "single foundation" or "wall foundation" type can be created in RFEM either as hinged nodal supports or line supports, or as surfaces with elastic foundation.
Spring stiffnesses of an elastic foundation are preset with standard values. Adjust the values in the RFEM model. The surface dimensions are also preset, and usually have to be compared with the geometric conditions.