Frequently Asked Questions (FAQ)

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• When opening a file of the RF-/PLATE-BUCKLING add-on module, the input data are not transferred and the default values are preset. What is the reason?

FAQ 003490 EN-US

The add-on module RF-/PLATE-BUCKLING is not downward compatible. Please open the file with the same version as when you created the file or with a newer version. Previous versions can be downloaded via the link below this FAQ.
• In RF-PLATE-BUCKLING, the reduction factor for consideration of the column buckling χc is calculated by the modified slenderness ratio of sheet metal plate ${\overline{\mathrm\lambda}}_{\mathrm p}$. Why is it not calculated with the slenderness ratio of the subsection ${\overline{\mathrm\lambda}}_{\mathrm c}$ ?

FAQ 003366 EN-US

The RF-PLATE-BUCKLING performs the plate buckling analysis according to Chapter 10 "Reduced Stress Method" of EN 1993-1-5. According to EN 1993-1-5, 10 (5) a), it is necessary to determine all reduction factors with the modified slenderness ratio of the plate panel ${\overline{\mathrm\lambda}}_{\mathrm p}$ according to Equation (10.2).
• I have purchased the programs RFEM and RSTAB. In My Account on the Dlubal extranet site, however, it is possible to see only RFEM (or only RSTAB) in the download area. Why is that?

FAQ 003337 EN-US

Whether or not the download for RFEM or RSTAB is displayed in the download area of the Dlubal account depends on whether or not you have concluded a service contract for the respective product.

If a service contract has been concluded for the respective product, the links for this product are visible.

If no service contract has been concluded, no links are visible.

If you purchase RFEM or RSTAB without a service contract at a specific time, you are entitled to use this program version. If you need the download link for the purchased program version, you can download it on our homepage in the 'Previous Program Versions' section.

• Is it possible to use a trial version of RFEM 5 on a virtual machine?

FAQ 003260 EN-US

Unfortunately, it is not possible to run any single-user licenses on virtual machines. Licensing is neither possible with the USB dongle nor with a softlock license.

The test or trial version of RFEM 5 or RSTAB 8 is a time-limited version that is controlled by a softlock. Therefore, the trial version of RFEM 5 or RSTAB 8 cannot be tested on a virtual machine.

In general, it is possible to operate a licensed version of RFEM 5 or RSTAB 8 on a virtual machine. For this, however, you would need a network license.

The same applies to the test versions of the stand-alone programs SHAPE-THIN, RX-TIMBER, PLATE-BUCKLING, CRANEWAY, and COMPOSITE BEAM.

• How can you specify in PLATE-BUCKLING, whether it shall comprise a rigid or non-rigid stiffener (end post) when calculating the reduction factor at shear buckling?

FAQ 002923 EN-US

In the Details, the PLATE-BUCKLING provides a choice between a rigid and non-rigid stiffener (end post) to specify the shear buckling reduction factor (see Figure 1).

• Is there a possibility to select "Members" and to apply the geometry as a panel and its internal forces into the module?

FAQ 002906 EN-US

Yes, that is possible. If the add-on module PLATE-BUCKLING is not opened as a stand-alone version, but via RSTAB or RFEM, the panels (c/t parts of a member cross-section), as well as the respective load cases in PLATE-BUCKLING of the RSTAB or RFEM Models, can be loaded (see picture).

• I have to install several Dlubal program packages on my computer. Is it possible to install all program packages with just one click?

FAQ 002799 EN-US

The Dlubal products cannot be installed with a single click. However, there are tools available to make the installation considerably more efficient.

To do this, download the batch installer.

Place the program in any folder and save the Dlubal installation packages in the same folder or subfolders.

Start installer.exe with a double-click. You will then be asked which products you would like to install, and you can install them one after the other without the need of further mouse clicks.

• I use the add-on module PLATE-BUCKLING and need more detailed information on how the critical buckling stress for buckling behavior is calculated. The stiffeners end before the edges. Is the eigenvalue of the buckling analysis calculated as a member with the effective plate width?

FAQ 002793 EN-US

If your buckling stiffeners are not defined within the complete length of buckling panel, the PLATE-BUCKLING program will automatically generate this stiffness as equivalent member incl. effective width and performs eigenvalue analysis by the BUCK Add-on Module. The result of it is the critical buckling stress of the member and thus of the stiffness. The length of the equivalent member is the stiffener length itself. It is currently not possible to display the internal results in detail.

• In some windows, areas are cut off so that buttons or functions of the program can not be reached. How can you fix this?

FAQ 002633 EN-US

The dialogs in the Dlubal programs are optimized for the display size in the control panel of 100%. You may be able to correct the problem if the display size in the Control Panel is changed to 100% (see Figure 1) or / and a higher resolution is set.

Remedy could also be the deactivation of scaling at high DPI values. To do this, open the properties by right-clicking on the program icon. Under the Compatibility tab, check the box for Overwrite high DPI scaling behavior. Scaling performed by: and select the setting application from the drop-down box. Then accept the change and confirm with OK (see Figure 2).
• How do I change the default settings for the units so they are preset in every new file?

FAQ 002354 EN-US

The default settings are loaded for every new file. If you wish to change them, you have to create a new profile after making the desired changes and set it as "Default" (see figure). If you now start a new file, this setting remains saved. It is also possible to create several profiles, which can subsequently be loaded and managed.

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First Steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

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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