RF-CONCRETE Members – Online Manual Version 5

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RF-CONCRETE Members – Online Manual Version 5

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5.1.1 Required Reinforcement by Cross-Section

Required Reinforcement by Cross-Section

The table shows the maximum reinforcement areas of all analyzed members, which are determined from the internal forces of the load cases, load and result combinations selected for the ultimate limit state design.

Figure 5.2 Window 2.1 Required Reinforcement by Cross-Section

The program displays the maximum required reinforcement areas resulting from the parameters of the reinforcement groups and the internal forces of the governing actions for all designed cross-sections.

The reinforcement areas of the longitudinal and the shear reinforcement are sorted by cross-sections. Both parts of the window show the reinforcement types and design details that are selected in the Results to Display dialog box (see Figure 5.3).

The lower part of the window lists all Detailed Results for the table row selected above. These design details allow for a specific evaluation of the results. If you select another table row in the upper part, the detailed results will automatically be updated in the lower part.

Reinforcement

The following longitudinal and shear reinforcements are preset:

Table 5.1 Longitudinal and shear reinforcements
Reinforcement Explanation

As,-z(top)

Reinforcement area of the required top longitudinal reinforcement due to axial force, or bending with or without axial force

As,+z(bottom)

Reinforcement area of the required bottom longitudinal reinforcement due to axial force, or bending with or without axial force

As,T

Reinforcement area of torsional axial reinforcement, if required

asw,V,stirrup

Area of required shear reinforcement for absorption of shear force, in relation to the standard length 1 m

asw,T,stirrup

Area of required shear reinforcement for absorption of torsional moment, in relation to the standard length 1 m

asf,-z(top)

Area of required shear reinforcement for absorption of shear forces between beam web and flanges on the -z side of the cross-section, in relation to the standard length 1 m

asw,T,stirrup

Area of required shear reinforcement for absorption of shear forces between beam web and flanges on the +z-side, in relation to the standard length 1 m

The top reinforcement is defined on the member side in direction of the negative local member axis z (-z), the bottom reinforcement correspondingly in the direction of the positive axis z (+z). To display the member axes, use the Display navigator in the RFEM graphical user interface or the shortcut menu of the member (see Figure 3.32).

Click the [To Display] button to open a dialog box where you can specify the reinforcement results to be displayed in the upper part of the window.

Figure 5.3 Results to Display dialog box

The settings in this dialog box also control the results output in the printout report!

Member No.

For each cross-section and each reinforcement type, the table shows the number of the member that has the maximum reinforcement area.

Location x

The column shows the x-location on the member for which the program has determined the maximum reinforcement. The following RFEM member locations x are used for the table output:

  • Start and end node
  • Division points according to member division, if specified (see RFEM Table 1.16)
  • Member division according to specification for member results (Global Calculation Parameters tab of Calculation Parameters dialog box in RFEM)
  • Extreme values of internal forces
LC / CO / RC

This column shows the numbers of the load cases, load or result combinations that are governing for the respective designs.

Reinforcement Area

For each reinforcement type, column E informs about the maximum reinforcement areas required for the ultimate limit state design.

The Units of the reinforcements shown in column F can be adjusted with the menu option

    • Settings → Units and Decimal Places.

The dialog box described in chapter 8.3 opens.

Error Message or Note

The final column indicates non-designable situations or notes referring to design issues. The numbers are explained in the status bar.

Use the button shown on the left to view all [Messages] of the current design case.

Figure 5.4 Error Messages or Notes to Design Process dialog box