STAAD.Pro Help

D. CSA-A23.3-10 Column Design Brief dialog

The CAN/CSA-A23.3-10 Column Design Brief has the following tabs for setting out the design parameters:

Materials tab

Note: Unless stated otherwise, the available bar sizes include: 6, 8, 10, 12, 16, 20, 25, 32, 40 and 50
SettingDescription
Concrete group
SettingDescription
Strength fc' Type the design strength of the concrete, f'c (in MPa).
Aggregate Size Type the maximum size of aggregate used in the concrete mix (in mm).
Density Type the density of the concrete used (in kg/m3).
Cover Type the cover to the shear reinforcement (in mm).
Interior / Exterior Exposure Select the exposure of the concrete based on it's use in the structure.
Main Bars group
SettingDescription
Strength fy Type the steel yield strength, fy , to use for the main reinforcing steel (in MPa).
Modulus Type the modulus of elasticity for the reinforcing steel, Es (in MPa).
Bending Dimensions Click to open the Bending Dimensions dialog, which is used to specify bending dimensions for each bar size.
Min / Max Size Select the minimum and maximum bar sizes to be used.
Links group
SettingDescription
Strength fys Type the steel yield strength, fys , to use for the shear reinforcing steel (in MPa).
Modulus Type the modulus of elasticity for the shear reinforcing steel, Es (in MPa).
Bending Dimensions Click to open the Bending Dimensions dialog, which is used to specify bending dimensions for each bar size.
Min Size Select the minimum bar sizes to be used for the shear links.
For Circular Sections Use Select either Tie Rft or Spiral Rft to use for confining shear links for circular columns.

Column Parameters tab

SettingDescription
Bracing conditions y-y /z-z groups
SettingDescription
Effective Length Factor Type the effective length factor for bending about the indicated axis, ky .
Braced Set this check box if the columns are braced in the local y-y/z-z axis.
Stability Index Q When columns are not Braced, type the stability index, Q, for that direction.
Sidesway Load Case Use the drop-down list to select the load case to consider for sidesway. The Same as Primary Loadcase option uses the design load case, but any other load case included in the model can be selected.
Include Torsion Effects Set this option to consider torsion in the design of the reinforcement.
Design as Sway Frame Set this option if the frames which include the columns are subject to sidesway.
Ignore second order effects Select this option to ignore magnified moments accounting for second order effects.
βd Type the ratio of sustained axial load to total axial load to use in the design as defined in Chapter 10 and clause 10.14.1.3 of CAN/CSA A23.3-04. This value is used to calculate the EI value in equation 10-19.
Started Bar Area Provided Type the area provided for initial main reinforcement steel (in mm2).
Max spacing between main bars Type the maximum spacing to be used between the longitudinal bars (in mm).

Member Loadcases tab

Used to select load case results which are used for column design with this brief.

SettingDescription
Available list Contains all primary load cases and load combinations in the STAAD.Pro input file.
Selected list

Load cases and combinations the results of which will be used for the column design when this brief is used in a Design Group.

Tool icon Description
> Adds the load case(s) selected in the Available list to the Selected list.
>> Adds all load cases from the Available list to the Selected list.
< Removes the selected load case(s) from the Selected list.
<< Removes all load case(s) from the Selected list.
Note: By default, no load cases or combinations are selected.