In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
Customer Support 24/7
Please select only members with a reinforced concrete cross-section in the input dialog box 1.6 for the design. If members from z. For example, if you select Steel, you receive the corresponding error message.Figure 01 - Message No. 2379 - Invalid Material Data!If you select "All members", the members with a steel cross-section are automatically removed from the design.
You can set the display properties of the cross-section's cross-section in the Display Properties dialog box (Options → Display Properties → Edit menu). The settings can be found in the Colors → Miscellaneous → External Cross-Section/Colors → Miscellaneous → Internal Cross-Section (see Figure 1) category. The line color, type, and thickness can be set separately for the screen and the printout report.
Basically, all cross-sections of the solid and hybrid cross-section groups can be designed in the RF-/TIMBER Pro program. In Figure 01, they are shown on the right.
For more complex unsymmetric cross-section shapes, it may be necessary to adjust the allowable principal axis angle in the add-on module on a user-defined basis (see Figure 02).
Creating the opening by means of an intersectionTo create the opening, you have to create a surface with the diameter of the opening through the pipe wall. With the function 'Create Intersection' single components are created which can be deactivated afterward. The procedure is demonstrated in the video.
Creating the opening by means of a converted intersection lineIt is also possible to convert the found intersection line into a normal line. Then, the intersection can be deleted and an opening can be put into it. The inserted opening must then be manually integrated into the surface (see video). However, it should be noted that the quality of an intersection is higher than the converted intersection line. When using the converted intersection line, discontinuities may occur in the rendering or in the FE mesh, depending on the model.
Yes, the RWIND Simulation program is generally designed and can implement any model of RFEM or RSTAB.
Figure 03 - RFEM Model
For a steel structure consisting of pure member elements, the program creates a coherent, voluminous envelope of the member surfaces for the numerical wind tunnel. The result of this modeling for the simulation depends on the available cross-sections and the mesh settings. Due to the wind current, corresponding surface pressures result on this surface layer.
Figure 02 - Surface Pressure on OpenFOAM Mesh
After having calculated the wind flow, the program sums the surface pressures of the member units and returns a corresponding equivalent load (single, uniform, or trapezoidal) for each member axis.
Figure 04 - Options for Member Load Distribution
These loads are applied in RFEM or RSTAB for the further calculation of internal forces.
Figure 05 - Equivalent Load from RWIND Simulation
AnswerThe graphic display of the nodal displacements and rotations is made via the entry GlobalControlling deformations in the Results navigator. Additionally, there is a possibility to display the deformations not only as lines but also as colored cross-sections in the Project Navigator.
The cross-sections created with SHAPE-THIN can be loaded via the cross-section library. To do this, click the 'Import Cross-Section from Program SHAPE-THIN' button in the 'New Cross-Section' dialog box (Figure 1).
The dialog box 'Import Cross-Section from Program SHAPE-THIN' involves the following directories (Figure 2):
- all directories that are included in the Project Manager of RFEM 5, RSTAB 8, SHAPE-THIN 8, etc.
- all directories that are included in the Project Manager of previous program versions of SHAPE-THIN such as SHAPE-THIN 7
With the "Search for SHAPE-THIN Cross-Section" button (Figure 3) it is possible to search for cross-sections in directories that are not integrated in the Project Manager. The searched directory is then added to the directory list of the 'Import Cross-section from Program SHAPE-THIN'.
The desired cross-section can be selected and imported from the respective directory. Please note that the cross-sections must be calculated and saved in SHAPE-THIN before the cross-section values can be loaded. It is only possible to import each cross-section individually.
When importing a SHAPE-THIN cross-section into RSTAB/RFEM, this cross-section is imported into the user-defined cross-section library. The user-defined cross-sections can be imported using the "Load Saved User-Defined Cross-Sections" button of the cross-section library (Figure 4). If you want to update the cross-section in the user-defined cross-section library, import the modified cross-section once more. The security query must be answered with 'Yes' (Figure 5).
The video initially demonstrates how the BRIDGE cross-section from the folder Examples linked in the Project Manager is imported. Then, the cross-section example-1 is imported from the Desktop directory that is not linked to the Project Manager. The cross-sections are now available in the user-defined cross-section library. By way of example, the cross-section Example-1 in RFEM is deleted and pasted into the user-defined cross-section library. Subsequently, it is demonstrated how the Example-1 cross-section is changed to SHAPE-THIN and imported into RFEM.
In RFEM, the interface application 'Simulate and Generate Wind Loads' makes it possible to exchange member, surface, and solid elements, and in RSTAB to exchange the member elements.
To avoid generating a too fine mesh along with a corresponding long calculation time, the program simulates all members with a rectangular cross-section as standard. The size of the rectangular cross-section is selected in such a way that the real cross-section geometry is barely included.
By deactivating the option 'Export Optimized Member Topology', you can avoid this additional optimization of the model and allow consideration of the real cross-section geometry within existing cross-section settings.
If the exact representation of the cross-section geometry requires more than 1000000 elements, the interface automatically changes to the simplified rectangular section display of the cross-sections.
AnswerIn this case, it is worth taking a look at the stress points in the cross-section details. If they are not accessible (grayed out), no stress points have been defined in SHAPE-MASSIVE and design is not possible. In SHAPE-MASSIVE, the option 'Stresses by Stress Points' must be activated in the General Data. After recalculating and saving, the cross-section can be designed in the RF-/STEEL add-on module.
AnswerIf you are using members with cross-sections, which are not known be the interface, you should use the mapping file for cross-sections. The mapping file can be easily filled with the names of the cross-sections. In the left column of the table write the names of cross-section used in TEKLA and in the right column you write the DLUBAL names or select them from the library.Please check the attached video.Note:
In TEKLA you have to have loaded the right environment. In the video Chinese cross-sections should be transferred, so the Chinese environment has to be used in TEKLA.
Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.
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.
Your support is by far the best
“Thank you very much for the useful information.
I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. In the industry of structural analysis, I use several software including service contract, but your support is by far the best.”