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Frequently Asked Questions (FAQ)
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In the detail settings of the respective result beam, you can specify which objects (members, surfaces, or solids) are to be considered by this result beam.
If, for example, For example, if an unexpected result is displayed for the result beam, you should check in this dialog box whether the integration area has been set correctly for the treated objects.
In this regard, there are several options.
On the one hand, you can decompose the eccentric load into the vertical component and the moment component, and model the loading by using line loads.
On the other hand, you can apply the line load eccentrically to the surface by means of an additional surface with the surface type - Stiffness "Rigid."
I am trying to verify RF‑CONCRETE Surfaces on the basis of the results of the example from the manual. Chapter 2.4.3 describes the determination of the statically required reinforcement. Unfortunately, I cannot create an example that exactly represents these results. Can you send me the corresponding example?
You can download the corresponding example under the link below.
The results shown in Figure 2.39 in the manual of RF‑CONCRETE Surfaces come from the reinforcement in the bottom position in Grid Point R27 - see the following figure with the design details for this point.
The RF‑CONCRETE NL add-on module is a module extension of RF‑CONCRETE Surfaces.
The calculation of deformations in cracked sections (state II) with RF‑CONCRETE NL can be activated by setting the "Nonlinear" method of check in the "Serviceability Limit State" tab of RF‑CONCRETE Surfaces.
The RWIND Simulation program displays the size of the wind speeds around the model bodies under the Velocity Field result. By displaying this result type, the program automatically switches to the "slicer" display. This display type shows the scalar result, which is spatially available at all positions between the model bodies, only in the area of a plane (slicer).Figure 01 - Wind Comfort AnalysisFor a wind comfort analysis, the wind velocity result at a certain distance to the traffic area is usually required. For this, proceed as follows:
- Activate the Velocity Field result.
- Rotate the slicer planes into a plane parallel to the traffic area to be analyzed.
- In the settings, define the desired distance of the slicer plane to the traffic area by entering a height.
- Activate the Velocity Field result.
Yes, it does make a difference whether the surface is divided or not.
If the line with the line hinge arranged on it is only integrated into the surface and the surface is not divided, the RFEM solver uses a different calculation method than for a surface divided into partial surfaces.
For a line that is only integrated into a surface, the stiffness of the first element row is reduced in order to approximate the line hinge.
When applying partial surfaces, the line hinge is implemented internally by means of line releases so that the hinge can be modeled more precisely.
Furthermore, it is also necessary to check the FE mesh in this comparison. Depending on the geometry of the surfaces and the set FE mesh size, the FE mesh can deviate significantly, so there may be result deviations in addition to the different calculation methods. In this case, the FE mesh can be approximated by FE mesh refinements, if necessary.
In RFEM, you can model and design connections with the individual dimensions. The video on the left shows an example of modeling and calculation of a rigid bolted connection by using member and surface elements as well as contact solids.
Furthermore, you can define bolt prestressing forces and perform plastic design (RF‑MAT NL add-on module required), for example.
Yes, it is. To do this, select the "Names" option, see Figure 01.
Yes, it is possible. In Window "1.4 Longitudinal Reinforcement" includes a filter function.If you click this button, the surfaces connected to the punching points are only displayed.
It is possible to display or calculate the stresses in RFEM as well as in the add-on module by means of the following smoothing options:
- Constant on Elements
- Continuous Within Surfaces
- Continuous Total
- Continuously by Groups / Continuous by Groups
To compare the results, the same display type and calculation type must be selected in RFEM and RF‑STEEL Surfaces.
In RFEM, it is possible to do this in Project Navigator Display → Results → Surfaces → Distribution of Internal Forces/Stresses (Figure 02). In RF‑STEEL Surfaces, this can be displayed or changed in Details → "Options" tab (Figure 03).
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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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