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 principle, it is also possible to perform detailed analysis in RF‑LAMINATE. In the case of a very high shear distortion, for example, it can be reasonable to use orthotropic solids for modeling. The video shows a simple modeling and result evaluation of a layer structure by using solids.
A criterion, as of when is the modeling using solids useful, is the shear correction factor. Further information and other criteria can be found in the following FAQ:
AnswerThe easiest way to consider this is to use the RF‑/JOINTS Timber - Steel to Timber add-on module. For this purpose, the module decomposes the original connection, and creates a new structural system that considers the flexibility accordingly. In this case, the ultimate limit state, the serviceability limit state, and the accidental design situations are considered separately.
AnswerThe detailed procedure shows the video. It refers to the most important features:
Generally, the form-finding process in RFEM always considers all model data. In form-finding, the elastic supporting elements on the membrane react with the deformations in the direction of the membrane tensile stress acting. The integral process gives the prestressed model to the subsequent calculation if the forces of all deformed elements are in equilibrium with the membrane geometry subjected to the specified prestress.Figure 01 - Form-Finding with Deformed Supporting StructureHowever, the flexibility of the supporting structure can be suppressed for the pure form-finding by defining the support with the "Form-finding stage only" nonlinearity (also called form-finding support) at the membrane edges.In this case, the form-finding process results in a shape whose prestress is in equilibrium with the specified form-finding support forces and the remaining boundary conditions.For the structural analysis of all other load cases and combinations, the form-finding supports are deactivated, and the form-finding support forces are applied as external loads to keep the global equilibrium on the entire model.Due to the removal of the supports, the membrane reacts with the semi-rigid supporting structure in the subsequent analyses (LC and CO). Without additional loading, this reaction is similar to the relaxation with the associated reduction of prestress.
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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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