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)
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AnswerThe Design According to Formula column lists the equations of the standard used to carry out the design.The abbreviations stand for the following designs:CS Cross-section designST Stability analysisSE Serviceability (SLS design)The numbers directly behind it are internal information.The lower table of the intermediate values shows the design formulas with the design conditions that are relevant for the selected design.
AnswerIf the PLATE‑BUCKLING add-on module is not opened as a stand-alone version, but via RFEM or RSTAB, it is possible to import the panels (c/t parts of a member cross-section) and the respective load cases of the RFEM or RSTAB model to PLATE‑BUCKLING (see the figure).If there are no valid cross-sections of PLATE‑BUCKLING found in the model file of RFEM/RSTAB, the option for importing the buckling panels remains inactive.
AnswerUnfortunately, groups of members cannot be designed in STEEL EC3. A continuous member can only be created and selected to design continuously connected members.
AnswerWith the PLATE-BUCKLING add-on module, you can only calculate rectangular buckling panels.The panel is entered via 1.1 of the add-on module. Alternatively, the panel can also be created from an existing RFEM or RSTAB file by selecting the respective c/t-part.
AnswerUnfortunately, this is not possible. The design module can only be used together with the internal forces from RSTAB or RFEM.
AnswerIn this case, it is recommended to use the module extension RF-/STEEL Warping Torsion :RF-/STEEL Warping Torsion is an extension of the RF-/STEEL EC3 and RF-/STEEL AISC add-on modules. It performs flexural-torsional buckling analyzes of members according to the second-order analysis with seven degrees of freedom and a form of imperfection affecting the mode shape.You can find more information in the links below this FAQ.
You can use the SHAPE-THIN program to assign the cross-section name you want. However, it is important to use the same name for different cross-sections.
Due to the data structure saved in the program, the program overwrites the profiles with identical descriptions. In this case, the database of the SHAPE-THIN program is linked to the program RFEM and RSTAB. Doubled data storage would inevitably lead to conflicts on the part of the program.
If the user wants to repeatedly assign identical names, it is possible to delete the file EigProf.dat in the respective directory (e.g. C:\ProgramData\Dlubal\RFEM 5.xx\General Data). This file will be used for saving user-defined profiles.
AnswerIt is possible because RFEM provides the perfect basis for the calculation and design of piping systems. The RF-PIPING and RF-PIPING Design add-on modules provide support for modeling and design.
Since support structures and other components of the entire model can also be represented, a realistic analysis and design is possible.
Main Programs of RFEMThe RFEM basic programs are used to define structures, materials, and actions.
Modeling of pipelines including typical fittings such as valves, flanges or reducers.
- RF-PIPING Design
Comparison of existing and allowable stresses of piping systems
- EN 13480-3
- ASME B31.1
- ASME B31.3
Dynamic AnalysisIf earthquake calculations or vibration analyzes are necessary on the building, the RF-/DYNAM Pro add-on modules provide suitable tools for determining natural frequencies and shapes, analysis of forced vibrations, for generating equivalent loads, or for nonlinear time history analysis.If you have any further questions on the Dlubal programs, please do not hesitate to contact the sales department.
To do this, select the checkbox in Table 1.2 Geometry in column J (see Figure 01).Then, it is possible to view the release definitions in the 'Releases' tab (see Figure 02).If you want to modify the releases, you have to set the support type to 'User-Defined' in the 'Support' tab. The releases can then be freely defined (see Figure 03).
AnswerSo that smooth ranges are taken into account in the design in RF-STEEL surfaces, they must always be activated in the detail settings of the add-on module. See Figure 01 with the detail settings in RF-STEEL Surfaces.
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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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