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9.2.2 Input in RF-CONCRETE Members
Input in RF-CONCRETE Members
To determine the reinforcement, only the ultimate limit state is considered. In window 1.1 General Data, select RC1 for the design.
In window 1.2 Materials, the materials Concrete C20/25 and B 500 S (A) are preset.
Window 1.3 Cross-Sections is described elsewhere when creeping is considered (see Figure 9.18).
Because the calculation is performed by considering moment swap and moment reduction, we have to specify some settings in window 1.5 Supports.
In column B, we enter the support widths shown in the figure above. Then, in table column F, we reduce the maximum column moment for the intermediate support to 85 % of the linear elastic value. To enable the input field, select the check boxes below the graphic on the right so that the program will take the specifications for the design into account.
Showing the provided reinforcement is of major importance for the nonlinear calculation because it is a decisive influencing value when determining curvatures in the cracked state. In window 1.6, we create an additional reinforcement diameter of 6 mm (see Figure 9.12).
In the Reinforcement Layout tab of window 1.6 Reinforcement, we specify the concrete covers with 22 mm. Thus, the bar centroidal axis applied for the design is 25 mm.
The input is thus complete and the [Calculation] can be started.