Form: Concrete Column Design Information {Code} or Concrete Beam Design Information {Code}, Interaction Surface for Section {Name}{Code}
Interactive concrete frame design allows you to review the design results for any frame object and to interactively change the design overwrites and immediately view the results.
After completing the Modeling Process using concrete frames, access Interactive Concrete Frame Design as follows:
Select the Analyze menu > Run Analysis command to analyze the model.
Select the Design menu > Concrete Frame Design > Start Design / Check of Structure command.
Right click on a frame object while the design results are displayed on it to enter the interactive design mode and interactively design the object using the Concrete Column Design Information {Code} or Concrete Beam Design Information {Code} form, depending on whether the frame object is a column or a beam. If design results are not currently displayed, click the Design menu > Concrete Frame Design > Interactive Concrete Frame Design command and then right click a frame object to enter the interactive design mode for that object.
Note: The Concrete Column Design Information {Code} or Concrete Beam Design Information {Code} form also can be displayed as follows: (a) click the Design menu > Concrete Frame Design > Display Design Info command to access the Display Design Results form, (b) select the input/output option and the type of information to be displayed, and (c) right click on a frame object.
Use the various areas of the Concrete Column Design Information {Code} or Concrete Beam Design Information {Code} form to review the design:
Frame ID: The label associated with a frame object that has been assigned a concrete frame section property that is designated as a beam or a column.
Important Note: A concrete frame object is designed as either a beam or a column depending on how its frame section property was designated when it was defined using the Define menu > Frame Sections command. Note that when using that command, after a section has been specified to have a concrete material property, click the Reinforcement button and specify whether the section is a beam or a column.
Design Code: The design code selected using the Concrete Frame Design Preferences form.
Analysis Section: The section property that was used for this frame object in the last analysis. Thus the design forces are based on a frame object with this section property.
Design Section: The current design section property. It is important to note that subsequent analyses use the section property specified in this list box for the next analysis section for the frame object. Thus the forces and moments obtained in the next analysis are based on this section. Change the Design section property by clicking the Overwrites button and making the changes on the resulting form.
Note: For final design iteration, the Analysis Section and the Design Section property should be the same. Use the Design menu > Concrete Frame Design > Verify Analysis vs Design Section command to determine if this is the case. If it is not, repeat steps 1 through 4 until the analysis and design sections match. As appropriate, use the Overwrites button to display the Concrete Frame Design Overwrites form and change the design parameters. Thus, the Analysis Section is changed/updated by rerunning the analysis. The Design Section is changed by selecting a new section on the Concrete Frame Design Overwrites form.
Table Showing Reinforcement Information This table shows the output information obtained for each design load combination at each output station along the frame object. For columns that are designed by SAP2000, the item with the largest required amount of longitudinal reinforcing is initially highlighted. For columns that are checked by SAP2000, the item with the largest capacity ratio is initially highlighted. For beams, the item with the largest required amount of longitudinal steel (either top or bottom) is initially highlighted.
Combo ID: The design load combination considered.
Station location: The location of the station, measured from the i-end of the frame object.
Columns only:
Longitudinal reinforcement: Applies specifically to columns for which SAP2000 designs the longitudinal reinforcing. It is the total required area of longitudinal reinforcing steel.
Capacity ratio: Applies specifically to columns for which you have specified the location and size of reinforcing bars and thus SAP2000 checks the design. The capacity ratio is determined by first extending a line from the origin of the PMM interaction surface to the point representing the P, M2 and M3 values for the designated load combination. Call the length of this first line L1. Next a second line is extended from the origin of the PMM interaction surface through the point representing the P, M2 and M3 values for the designated load combination until it intersects the interaction surface. Call the length of this line from the origin to the interaction surface L2. The capacity ratio is equal to L1/L2.
Major shear reinforcement: The total required area of shear reinforcing per unit length for shear acting in the column major direction.
Minor shear reinforcement: The total required area of shear reinforcing per unit length for shear acting in the column minor direction.
Beams only:
Top steel: The total required area of longitudinal top steel at the specified station.
Bottom steel: The total required area of longitudinal bottom steel at the specified station.
Shear steel: The total required area of shear reinforcing per unit length at the specified station for loads acting in the local 2-axis direction of the beam.
Overwrites button. Click the Overwrites button to access the Concrete Frame Design Overwrites form.
Summary button. Click the Summary button to display a summary of the design data for the highlighted section. Print the information using File menu > Print command at the top of the form.
Flex. Details button. Click the Flex. Details button to display the axial force and biaxial moment design for PU, M2 and M3, factored and minimum biaxial moments, axial force, biaxial moment factors and other details for the highlighted section. Print the information using File menu > Print command at the top of the form.
Shear Details Button. Click the Shear Details button to display the shear design for V2 and V3, design forces, capacity shear, design basis, concrete shear capacity shear rebar design, and other details for the highlighted section. Print the information using File menu > Print command at the top of the form.
Columns only:
Interaction button. Click the Interaction button to display the Interaction Surface for Section {Name} {Code} form.
Joint Shear button. Click the Joint Shear button to display the compression, tension bending, shear and overstrength factors for the highlighted section. Print the information using File menu > Print command at the top of the form.
B/C Details button. Click the B/C Details button to display the Beam/Column Capacity Ratio details. Print the information using File menu > Print command at the top of the display window.
Tabular Data Button Click the Tabular Data button to access the Concrete Details (Database) form. Use the various menu commands on the form to export, display, and print the data table.
Table Format File button. Click the Table Format File button to access the Set Database Table Formats File form and specify the format (i.e., stylesheet) to be applied to the output (i.e., export, display or print). Use the form to specify the Use Program Default Table Formats option or the Use Formats from User Defined Table Formats File option. When the Use Formats from User Defined Table Formats File option is chosen, also click the Select button to locate a previously defined format file. Table formats are defined using the Modify/Show Database Table Format form. The default or selected table format will be applied to output (i.e., export, display or print) of the data.