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Frequently Asked Questions (FAQ)
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In this case, the following conditions must be observed for the generation of the FE mesh:
- The two contact surfaces must be identical, that is, all nodes, lines, and integrated objects must match, even if they are not used on one of the contact surfaces.
- To be able to generate an FE mesh even taking into account the unused objects, activate the option "Integrate Unused Objects into Surfaces" within the FE mesh settings, see Figure 1.
Depending on the selected load determination type, RF-PUNCH Pro determines the punching load from the shear forces in the critical control perimeter. The internal forces in surfaces from the RFEM model are used here.
If the FE mesh in the area of the punching node is not fine enough, the results may be inaccurate. In this case, you get message no. 56.
To avoid the problem, you should perform an FE mesh refinement in the RFEM model in the area of the punching node . You can arrange them either directly on the node or on the connecting lines of the wall ends or wall corners.
If the FE mesh refinement is sufficiently fine, the warning message disappears automatically after a recalculation in RF-PUNCH Pro.
Check whether the signal light of the dongle is on (see Figure 01). If it does not light up, try another USB slot, preferably using directly a motherboard and not a USB hub or the front of the computer.
If the light is still not on, use another PC to test it. If the result is the same, the dongle is most likely damaged and needs to be replaced.
If the error message appears, despite the signal light is on, please make sure that you are using the most current authorization file.
If you cannot solve the problem, please send us a screenshot of the error message, a brief description of the problem and the diagnostic file that you can generate by using the program menu "Help" (see Figure 02).
In several individual proofs (for example, column flange on bend) the attacking bending moments are related to the pressure point. The average of the normal force is converted into an additional moment. In the case of predominant tensile forces, the pressure component is superimposed from the moment so strongly that instead of the pressure point, a second tensile zone is created (see picture).
In several individual proofs (for example, column flange on bend) the attacking bending moments are related to the pressure point. The average of the normal force is converted into an additional moment. If the compressive forces predominate, the direction of the moment may reverse and the connection will then be fully pressurized (see picture). There is no longer a clear pressure point.
After starting the calculation, RF-/FRAME-JOINT Pro appears in the "1.4.1 Beam on the right - Part 1" window and the following error message appears: "The value is out of the allowed range. Design Value: 6.00 - Min. value: 7.50". There seems to be no correlation with this window. What is the mistake?
The beam is a rolled section with welded taper from sheets or an I-section. In order to use such a cross-section in RF-/FRAME-JOINT Pro, the web thickness of the welded component has to have at least the same value as the main cross-section web.
Columns consist of a parametrized I-section (welded section). To use such a cross-section in RF-/FRAME-JOINT Pro, it is necessary to enter the web weld thickness as well. On the one hand, the weld in tension area is designed in RF-/FRAME-JOINT Pro; on the other hand, your thickness is also used in the calculation of effective lengths of the T-stub.
AnswerSuch a list is not available. If you need more information, please contact our support.
The calculation can be terminated due to an unstable structural system for various reasons. There can be a "real" instability due to overloading the system, but the instability effects may also be caused by failing members.
In the calulcation parameters, you can deactivate the nonlinearity "Members due to member type" (see Figure 01). If the calculation is then possible without the error message, the problem is probably caused by failing members.
The option "Failing members to be removed individually during successive iterations" in the Global Calculation Parameters dialog box (see Figure 02) allows you to prevent the complete failure of tension members. This will help in most cases. For this, the number of possible iterations should be sufficiently large.
An alternative method is to apply a prestress to the tension members in order to prevent the failure of them.
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