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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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.
AnswerWith the FE mesh refinement, it is also possible to create an aligned FE mesh in the program. Thus, the automatic FE mesh generator can be controlled to a certain extent. However, it is not possible to use it for setting of a specified mesh geometry.
RSTAB is a pure framework program and only determines internal forces, deformations, and support reactions.Stresses are variable depending of the cross-section and are calculated on the stress points of a cross-section. This stress determination is performed in the RF-/STEEL Add-on Module by calculating existing stresses and comparing them with the limit stresses.
AnswerRFEM includes an interface to programs from Dlubal. Input data of all versions of the previous executors forcan be imported without difficulty. can also open the structural files directly and them with surface or elements. Conversely, you can open RFEM 5 files in RSTAB 8.There is a direct link to the CAD applications ofand (but not for LT versions). With RFEM, you can use the advantages of BIM ( ) to exchange data models for digital planning.
The following points should be taken into account so that the calculated internal forces can be used for the design:
The model should reflect the real structure as accurately as possible. For this purpose, materials, surface thicknesses, cross-sectional dimensions, joint definitions, support conditions, etc. must be defined correctly.
The loads must be defined and applied in accordance with standards. The combinatorics can be automatically adopted by RFEM.
For internal forces of result combinations, attention must be paid to the evaluation of the correct max / min values. The maximum compressive force in a column corresponds to the minimum normal force (min N).
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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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