The structural analysis software RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as to model solid and contact elements.
RSTAB 9 is a powerful analysis and design software for 3D beam, frame, or truss structure calculations, reflecting the current state of the art and helping structural engineers meet requirements in modern civil engineering.
Do you often spend too long calculating cross-sections? Dlubal Software and the RSECTION stand-alone program facilitate your work by determining section properties of various cross-sections and performing a subsequent stress analysis.
Do you always know where the wind is blowing from? From the direction of innovation, of course! With RWIND 2, you have a program at your side that uses a digital wind tunnel for the numerical simulation of wind flows. The program simulates these flows around any building geometry and determines the wind loads on the surfaces.
Are you looking for an overview of snow load zones, wind zones, and seismic zones? Then you are in the right place. Use the Geo-Zone Tool to determine quickly and efficiently snow loads, wind speeds, and seismic data according to ASCE 7‑16 and other international standards.
Would you like to try out the capabilities of the Dlubal Software programs? You have the opportunity to do so! The free 90-day full version allows you to thoroughly test all our programs.
Yes, you can. Move your mouse pointer over the node and wait a moment. A bubble with the node coordinates will appear.
Yes, you can. In RFEM 5 and RSTAB 8, you can use the cross-sections created with SHAPE‑THIN 8 and SHAPE‑THIN 9.
No, the module isn't implemented in RFEM 6 / RSTAB 9 just yet. It's still in development right now.
If you are using RFEM 5 or RSTAB 8, click the "About RFEM and Licensing" entry in the Help menu. You can find your customer number here:
In RFEM 6 or RSTAB 9, click the "System Information" entry in the Help menu. You can find your customer number here:
The data exchange between RFEM 5 / RSTAB 8 and Tekla 2023 is possible using the Dlubal Tekla plugin from the Tekla Warehouse. This allows you to export the analytical model from Tekla 2023 directly in an RFEM 5 / RSTAB 8 file.
To do this, download the "Dlubal Tekla Plugin" extension fromTekla Warehouse
Open the downloaded TSEP file. This is opened automatically in the Tekla Structures extension manager.
Import the selected extension. The extension will be installed as soon as you restart Tekla Structures. After the installation, the extension is visible in the Tekla Structures Extension Manager.
In order to export an analytical model, it is necessary to set the Dlubal structural analysis program in the structural model properties. Then, you can use the Export button to export the model in an RFEM 5 or RSTAB 8 file.
This is probably a false alarm. Nevertheless, it is necessary to investigate the matter, because malware can disguise itself as any file.
We recommend that you check the file using this service:https://www.virustotal.com/gui/home/upload
This service, operated by Google, analyzes the file with over 70 different antivirus programs and malware scanners.
Local licenses (USB dongle, local softlock) cannot be used on virtual machines. For reasons that have not yet been clarified, some computers, mainly Microsoft Surface Books, may be incorrectly identified as virtual machines.
If you can rule out that you are using virtualization software, you can go to your registry editor under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Virtual Machine\Guest\Parameters\VirtualMachineId
and/or
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Virtual Machine\Guest\Parameters\VirtualMachineId
and rename the entry "VirtualMachineId".
Then, restart your PC.
This can happen if you have a node that is very far away from the main structure. It is recommended that you set the view to "Isometric" and then this will zoom out on your model and give you an idea of where these stray elements are located.You will need to delete these elements that are not attached to the structure or move them closer.Note: Enlarged graphical issues can happen when importing a model from another format and the structure is extremely far away from the origin. The solution to this is to move the model as close as possible to the origin.
To open your printout report in a different PDF reader than Adobe Reader, you should set the desired reader as the default one. However, you need to ensure that the chosen PDF reader supports 3D content so it can correctly display any 3D graphics that may be included.
To change the default PDF reader, you can follow the following steps:
The printout report is then exported to the desired PDF reader.
The problem arises from a conflict between RFEM or RSTAB and the mouse driver by 3Dconnexion.
To solve the problem, right-click the driver using the icons in the Windows taskbar, and activate and deactivate the creation of the log file in the shortcut menu. Finally, you should be able to start RFEM 5 and RSTAB 8 again.
As an alternative, you can replace the existing driver with an older driver (version 10.8.3, the download link attached). Then, you can use your Dlubal software as usual.
To show or hide the printout report navigator, use the View → Navigator menu.
You can also close the printout report navigator using the button.
Error "R6025 - Pure virtual function call" is related to the MS Visual C++ libraries.
You can use this YouTube video for the error analysis:
It can also be useful to unzip the installation file and use the Dlubal RFEM 64-bit.msi file directly for the installation.
Yes, this is possible. When you select "All Files" for the file type in the "Open" section of RSTAB 7, the RSTAB 8 files will be visible as well. They can be opened.
A warning message appears because it is, of course, not possible to consider the features that were not contained in the older version.
Another possibility is to rename the file from *.rs8 to *.rs7 and open it directly. The warning message appears even then.
This procedure is the same for RFEM.
If the MAX/MIN information is no longer displayed, please check whether you have activated this in the Display navigator.
Yes, you can. Mode shapes with only a small portion of the effective modal mass can be ignored.
You can define this manually or use a filter in the program.
The selection of mode shapes also has a direct effect on the performance. The lower the number of mode shapes, the lower the number of the load cases to be generated.
If you keep the automatic unit settings when importing the file, the setting of the UNITS variable in AutoCAD may take effect during the import. For example, inches are set in the "Insertion scale"; the background layer in RFEM is 25.4 times larger.For the import, we recommend setting the "Length" units of the DXF template, for example, in mm.
A calculation break‑off due to an unstable system can have different reasons. On one hand, it can indicate a "real" instability due to overloading the structural system; on the other hand, modeling inaccuracies may also be responsible for this error message. In the following text, you can find a possible procedure for finding the cause of the instability.
1. Modeling Check
2. Check of Stiffening
3. Numerical Problems
4. Detecting Causes of Instability
No, it is not. In RFEM 5 and RSTAB 8, the National Annex DIN EN 1998‑1/NA:2011‑01 is available. You can recognize this in the settings for a seismic zone or in the features of the add-on module.
Features of RF-/DYNAM Pro - Equivalent Loads
The National Annex DIN EN 1998‑1/NA:2021‑07 can be found in RFEM‑6 or RSTAB 9, where you can export it as described in FAQ 005181 and import it into RFEM 5 / RSTAB 8.
FAQ 005181 | Exporting Response Spectrum to RFEM 6
Yes, you can also export the response spectra from RFEM 6 and import them into RFEM 5 as a user-defined response spectrum. Please note that export and import via Excel may also have different columns/descriptions due to different versions.
Export your data in RFEM 6 to Excel.
If you want to import this table directly, you will get an error message. RFEM 5 expects a different worksheet description and two columns only.
As soon as you adjust the name in Excel and delete the column with the frequency results, you will be able to edit the response spectrum in RFEM 5.
In this case, please check the options of the global calculation parameters and make sure that the "Modify stiffness" option is activated; see the image.
This option is activated by default.
The direct input of a spring constant of the surface foundation is possible with a maximum of 2*108 kN/m3.
However, you can edit the stiffnesses of your surface supports in your load cases or even load combinations. If you multiply the value of the spring constant by a factor of 5, you can also see a stiffer support in the results.
Pay attention to the control of the stiffness modification, as explained in FAQ 4212.
FAQ 004212 | Stiffness Modification
You can find the latest drivers for graphics cards on the websites of the graphics card manufacturers.
Please note that the graphics card drivers must match the operating system. A driver written for Windows 8, for example, may not work with Windows 10.
On the website, there is usually a "Driver" or "Download" link.
First, read the installation instructions. You have to select the graphics card model and the operating system. Based on this information, you can usually download an executable file.
Save it to any folder and start the file after the download is complete.
Some manufacturers (for example, NVIDIA) offer a driver for different graphics card models.
Generally: www.treiber.com
ATI: www.amd.de
NVIDIA: www.nvidia.com
Matrox: www.matrox.com
SiS: www.sis.com
If you use an NVIDIA card on a remote computer, you may have to install an additional tool from NVIDIA to enable remote accelerated OpenGL:
https://developer.nvidia.com/nvidia-opengl-rdp
The display of internal forces for couplings (coupling members, rigid members) is deactivated by default. However, you can quickly enable the display of internal forces and deformations for these member types in the Display navigator (see image).
Log on to your Dlubal account on our website.
If you have ever had contact with us via email, signing in to your account should be easy. When logging in for the first time, it is necessary to "reset password" and enter your own password (see Image 01).
After signing in, you can find all AUTHOR.INI files that are up to date for your licenses under Licenses → Authorization Files to Download | RFEM 5, RSTAB 8, ... (see Image 02).
Yes, you can use RWIND 2 Basic with this program generation as of versions RFEM 5.27.01 / RSTAB 8.27.01.
All you have to do is to change the solver version to RWIND 2 in the wind load settings.
If RWIND does not start, run RFEM or RSTAB as an administrator and try again.
Please check whether you have started the licensed main program RFEM 5 / RSTAB 8 or opened the "viewer" by mistake. This viewer is only used to view files. It is license-free.
If you want to create files, you have to run the licensed main program. If the link does not exist anymore, you can copy the link to the viewer and then remove the "/viewer" addition in the properties.
In both RFEM and RSTAB, it is possible to consider friction for the translation at nodal support.
You can select from different options that take into account the different directional components. For example, the friction force for the z‑direction can be calculated from just the y‑component or just from the x‑component, but also from both together or even from the addition of both forces.
In addition to the friction coefficient, you can define the spring constant. It determines the behavior of the support before reaching the maximum friction force or the transition from static friction to sliding friction. The higher the value of the spring constant, the less the support can deform before it changes to the sliding friction.
In order to display the mode shapes of your dynamic analysis, you have to create a load case of the Modal Analysis type and specify your settings for the modal analysis there.
After the calculation, you can evaluate your results in the Results navigator. You can see further information in the table.
After the release of the new generation of Dlubal programs, including RFEM 6 and RSTAB 9, the Dlubal extranet layout was modified. The ability to download your authorization file (author.ini) is still possible. The file is now in a different location.
After successfully logging in to the extranet, you can follow this workflow selection:Licenses → Authorization Files for Download | RFEM 5, RSTAB 8,... → Authorization Files for Download...
The new generation of programs (RFEM 6, RSTAB 9, RSECTION) are entirely cloud-based, so they use online login for the authorization and no longer require the authorization file.