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Frequently Asked Questions (FAQ)
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AnswerIn the Detail dialogue of the import file it is possible to select the Angles instead of Nodes. Please see the picture. If this is checked the unused nodes should not occur.
There are two options for the export to Advanced Steel (Figure 01):
- Export via Product Interface
Export the data in an stp format via the interface of the German Steel COnstruction Association and import this file to the target program.
You can find this interface in the menu "File" → "Export" in the "Formats for Frameworks" section.
- Export via Advance Steel Interface
Export the data in an smlx format via the "Advance Steel" interface and import this file to the target program.
You can also find this interface in the "Export" dialog box, under "General Formats for CAD Programs."
AnswerThe deformations in the usability proof in STAHL EC3 are referenced by default to the displaced rod or rod set ends. This makes sense because you want to prove the local component.
See technical paper: https://www.dlubal.com/support-and-training/support/knowledge-base/001081
In the case of a result combination of load cases with the form LF1 / s + LF11 / s or up to LF31, a reference to the deformed system can lead to implausible results. The background to this is that the values of the displaced bar ends can come from independent load situations and thus a correct gauge can not be determined.The figure shows the enveloping deformation of an EK of the type (LF1 / s + LF11 / s or to LF31). The deformed bar ends each come from different load cases. Here this was simulated for comparison with LK's. The stitch determined in the middle of the staff is not meaningful to evaluate.One should work with load combinations in these cases.
Unfortunately, there are two different interfaces with the same file extension - the .stp interface of the German Steel Construction Association (Deutcher STahlbau-Verband, DSTV) on one hand, and the STEP interface (STandard for the Exchange of Product model data) on the other hand, which is defined in the ISO standard 10303.
While the DSTV interface refers to the system axes of members, that is to the structural model, the STEP interface refers to the model geometry in the form of boundary lines, surfaces and simple solids. In the latter case, the models can be imported either as RFEM objects (nodes, lines, surfaces, solids) or as background layers so that the nodes can be set manually. The STEP interface does not usually transfers any system lines, but only the outer contours of structural components so it is necessary to manually create system planes afterwards. You can do this in RFEM and RSTAB, for example, by using a CAD/BIM model.
If you get the error message shown in Figure 01, you have tried to import an .stp file based on STEP using the DSTV interface. As described above, both formats are not compatible with each other.
In this case, select the STEP format for the import, as shown in Figure 02. If a message shown in Figure 03 appears, it is because this interface requires the RF-LINK add-on module.
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Wind Simulation & Wind Load Generation
With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
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