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Frequently Asked Questions (FAQ)
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AnswerIf you do not open the hall in RSTAB but in RFEM (create a copy of the model and change the file extension from * .rs8 to * .rf5), then you can take over storage forces after calculating and saving. To do this, open the "Extras" in the model of the base plate and select "Take over bearing reaction from load".
After that, the bearing reaction can or must be taken over individually for each load case. The combination of the load combinations is then carried out via RFEM as usual.
AnswerThe following causes can be responsible for this:
- In most cases, these differences can be attributed to a lack of convergence. Increasing the iterations and increments in the calculation parameters and FE mesh settings should help.
- High stiffness jumps result in numerical problems, which leads to errors in the result evaluation. In RSTAB, this is not a major problem with a full and analytical approach. In RFEM, on the other hand, approximation approaches are used, so higher stiffness jumps should rather be avoided.
- Bedded bars may well be subject to deviations as well. If the bars are not or only roughly divided, there are convergence problems. A practical solution here is to select a "finer" bar pitch in the FE mesh settings.
The load transfer with the mentioned function is limited to vertical loads (import into 2D structures). If support reactions in other directions are required, they must be transferred manually.
In order to simplify the manual transfer, it is possible to display the "Smooth distribution" for each line instead of the "Actual" support reactions (see Figure). Of course, the finer the subdivision of the lines, the more accurate (more gradations), the result approximates to the actual distribution.
In the second tab of the panel, enlarge the display factor of "Support Forces". The display should therefore be improved (see Figure 01).
Alternatively, you can adjust the display properties in the menu "Options → Display Properties → Edit": In the "Results → Support Reactions → Nodal Forces" category, change the size of the representation. If necessary, you can additionally adjust the "Relative Limit Settings" in the detail settings (see Figure 02).
If you only want to display the "Max" or "Min value" for the RC results, you can set the corresponding setting in the Results navigator (see Figure 03).
AnswerThank you for your e-mail request. Free loads are not tied to an object when it's created. This is also shown in the attached diagram. If you define a free load (example free individual load with 10kN) and do not specify a specific area, all areas that meet this load in the load direction are loaded If two surfaces are touched, the sum of the bearing reaction = 20kN (no further loads required in the system).
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