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Frequently Asked Questions (FAQ)
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Yes, the RF‑PUNCH Pro add-on module allows for defining the desired longitudinal reinforcement in the "1.5 Punching Nodes" window, see the image.
If you want to consider the minimum moments when calculating the reinforcement for columns, you can also activate this in the add-on module as described in FAQ 004371.
AnswerIn addition to the standard functions, all input tables in the program also have the block functions. They allow you to edit marked numbers and number fields in the table in one step.You can access the block functions by right-clicking in the table:1. Add - A value is added to or subtracted from the selected cells with a numerical value.2. Multiply - Cells with a numerical value are multiplied by a factor.3. Divide - Cells with a numerical value are divided by a divisor.4. Set - The value of the first selected cell is set to all cells in the selection.5. Generate - Cells between the first and the last selected row are generated by interpolation of both edge values.The "Set" function allows you to quickly transfer a value to other rows.These functions are an ideal tool for changing the existing node coordinates to a new geometry, for linear extrapolation of unit load entries to any value, for unifying the values, and much more.
This adjustment of the arrow sizes of punching loads can be done in the display properties in the main program: Shortcut menu (right-click the workspace) → Display Properties → Loads → Nodal Loads → Nodal Forces, see the figure.
The "common surfaces" (Column I in Window 1.5) have an informative character.
In theory, you can select or deselect the surfaces to be considered in the punching shear design, and thus shorten the critical perimeter (see the video).
It is usually not necessary to make any changes here.
If the wall corner is at a corner of a plate, the add-on module may not create the critical perimeter as expected.
This can be optimized by changing the support of the wall corner from "Corner" to "Center" in Window 1.5.
This change would result in the distribution shown in Figure 03.
In the add-on modules for concrete structures, Eurocode 2 with the National Annex for Austria is available.
As soon as a license for "EC2 for RFEM" is available, the Eurocode can be used with all available NAs.
The National Annex for Austria is available in the following add-on modules for reinforced concrete structures:
- RF-CONCRETE Surfaces
- RF-CONCRETE Members
- RF-CONCRETE Columns
- RF-PUNCH Pro
- RF-FOUNDATION Pro
In a similar way, this also applies to the RSTAB add-on modules for reinforced concrete structures.
Please check if there is no mistake in units in the model when entering the width t of the "Wall in Z." The entry must be in "mm" at this location in the program.
If the width t is specified in cm instead of mm, RF‑PUNCH Pro does not recognize the wall end or wall corner.
As soon as the entry has been corrected, the node can be selected again for the design in RF‑PUNCH Pro.
AnswerFor surfaces with a variable surface thickness, RF‑PUNCH Pro iteratively determines the lowest static depth d along the critical perimeter, and applies it on the safe side along the entire perimeter for the design.
Yes, the minimum moments are also considered for punching shear on foundation plates. See also FAQ 004371 (link below).
In the current state of development (as of July 2020), however, the favorable soil pressure within the critical perimeter is not taken into account when determining VEd.
It is possible to use the "isolines" instead of displaying the results with "isobands" in the graphic.
First, switch to the "Isolines" display.
Then, you can additionally set in the Display navigator that the "Result Values Defined Automatically" should be displayed for the isolines.
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Wind Simulation & Wind Load Generation
With the stand -alone program RWIND Simulation, you can simulate wind flows around simple or complex structures 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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