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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.
In this example, we are creating a planar surface consisting of four nodes that have been imported and are apparently in a common plane, but in reality are not in one plane due to a previous modeling error of a few millimeters, for example. When trying to create a planar surface, the error message "Error defining surface! The nodes are not in one plane. "
When performing structural calculations, the derivation of forces from the roof to the foundations is one of the central tasks of the calculation in addition to the dimensioning of the cross-sections.
With the RF-STABILITY or RSBUCK add-on modules for RFEM and RSTAB, it is possible to perform eigenvalue analyzes for member structures in order to determine the effective length factors. The effective length coefficients can then be used for the stability design.
Pay particular attention to connection points of members and surfaces when you deal with mixed systems because not all internal forces can always be transferred without difficulty at the coupling location.
In the existing standard, there were no regulations for the distribution of snow loads for elevated solar thermal and photovoltaic systems on roofs. It was only advised to distribute the loads. Only with the National Annex DIN EN 1991-1-3/NA: 2019-04, concrete rules have been taken for this.
When you perform the subsequent modeling of a beam under an existing floor, the first question arises which forces should be transferred between the downstand beam and the floor and whether a composite effect is the goal. In this case, the floor should rest on the downstand beam without any composite.
In RFEM and RSTAB, you can use many interfaces to simplify the modeling of your structure. From background layers to the import of IFC objects that can be converted into members or surfaces, up to the import of the entire structural system from Revit or Tekla. Regardless of the performance of the selected interface, the further utilization also depends on the accuracy of the imported data.
The following article describes how to create a user-defined antenna bracket which will be used in RF-/TOWER Equipment.
The modeling of planar structural components such as glass panes is generally only possible in RFEM. If it is necessary to define the stiffening effect of a pane in a particular case, it can also be simulated in RSTAB.
This article describes how to determine the contact force between two objects behaving like walls that are inclined at a certain angle on top of each other. To determine this contact force, define a nodal release. Since a nodal release requires certain conditions, this article shows two examples.
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