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Frequently Asked Questions (FAQ)
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Yes, it is possible. To do this, activate the 'Name' option, see Figure 1.
The first of both reinforcements selected for display are displayed in red and blue by default. To change these and other colors, use the color scale within the panel, following the steps below:
- Double-click one of the reinforcements in the panel.
- The "Edit Isoline Value and Color Scales" dialog box opens: Double-click the color you want to change.
- The "Color" dialog box opens: Select a new color and click OK to confirm.
- Save it.
- The "Save Color Scale" dialog box appears: Enter the name of the new color scale and confirm it by clicking OK; the new color scale is now saved.
- Select the desired color scale and confirm it by clicking OK.
Figure 01 - Panel - Modifying Color Scale
AnswerIf the ultimate limit state is only considered, it is possible to define a different concrete cover by reinforcement direction in RF‑CONCRETE Surfaces (see Figure 01). Once the serviceability limit state is also designed, both reinforcement directions must be adjacent to each other. The different concrete cover by reinforcement direction cannot be taken into account anymore.
Consideration of 3D Design - Shell
In the case of the design in a 3D structure, the element is considered as a shell. Both the moments and axial forces can act here, which are transformed into the design membrane forces. These design membrane forces are then used to determine the required reinforcement. In connection with the transformation from moments and axial forces, the smaller lever arm from both reinforcement directions is applied. Thus, only one governing lever arm is assumed for both directions.
Consideration 2D Design - Slab
In the case of the design in a 2D structure, the surface element is considered as a slab. Only the moments act, which are designed with the corresponding lever arm of the direction. Thus, each direction is supposed to have its respective lever arm.
AnswerOne of the members adjacent to a support is shorter or exactly as long as the entered support width. Please change the boundary conditions such that the member is longer than the support width.
AnswerIn RF-CONCRETE Surfaces, the "top" or "bottom" position is controlled by the orientation of the area's local coordinate system.See also the FAQ000740This means for a wall that As, below or As, above can either be the reinforcement on the outside or inside depending on the orientation of the local z-axis.Both values must be taken into account for the reinforcement planning.So the sum of A s, below + A s, above .
AnswerThe Young's modulus in the state II is not directly output in the deflect calculation.But you can switch to the result window "3.3 Point-by-Scavity Serviceability Design" and filter an FE mesh or grid point for which you want to see the design details. See Figure 01.In the table, select the result row for the "u z, local " deformation.Then, click the [i] button to display the design details for the selected point.In the design details, you can find the intermediate values for the deformation analysis, such as the moment of inertia of the cross-section in state I and state II, the distribution coefficient zeta, and the final cross-section values. See Figure 02.Since these intermediate values are always determined when you open the design details table and are always displayed and temporarily saved for that point, the intermediate values can not be displayed graphically for the designed surface.
AnswerIn RF-CONCRETE Members (RFEM) or CONCRETE (RSTAB), the offset dimension is taken into account by default when determining the reinforcement proposal.The difference between You can see the required reinforcement with and without offset dimension when you see the results in the result navigator:- A s, -z (above)- A s, + z (below)- A s, -z (above), comp.- A s, + z (below), comp.Show.In A s, -z (above), comp. and A s, + z (below), erf. the offset dimension is included.See also picture 1.For the reinforcement proposal in RF-CONCRETE Members or CONCRETE, the anchoring length for a "straight iron" is considered by default. The setting can be found in the input mask 1.6. See picture 2.The anchoring length is from A s, -z (top), erf. and A s, + z (below), erf. determined. So the offset is also included here.
It is only possible to enter concrete covers of individual reinforcement layouts independently if no serviceability limit state design is performed.
As soon as you have selected a load for the serviceability limit state design in Table 1.1 in RF-CONCRETE Surfaces, the reinforcement layouts will be coupled together.
AnswerTo consider the average regions in the design in RF‑CONCRETE Surfaces, it is always necessary to activate them in the detailed settings of the add-on module. For this, see Figure 01 with the detailed settings in RF‑CONCRETE Surfaces.
In the design in RF‑CONCRETE Surfaces, the average regions are considered for the ultimate limit state design (ULS) as well as for the analytical calculation of the serviceability limit state (SLS).
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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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