STAAD.Pro Help

D. EC2 2004 Column Design Brief dialog

The EC2:2004 Column Design Brief has the following tabs for setting out the design parameters:

Materials tab

SettingDescription
Concrete

Specify the concrete strength either from the available concrete grades or by defining a concrete strength, fck, (in N/mm2).

Specify the minimum center to center spacing for reinforcement.

Specify the cover to the shear reinforcement.

Include Creep Effects [BA] Creep effects can be accounted for in the design of compression members as specified in Cl. 5.8.6(3) & (4) of the code. The program requires the Effective Creep Ratio [Cl. 5.8.4(2)] as input to consider the creep effects.
Effective Creep Ratio If creep is to be accounted for, specify an effective creep ratio to be used.
Main Bars

Specify the strength of steel to be used for the main bars either from the available steel grades or by specifying the steel yield strength to be used. If a user strength is defined, then the appropriate bar bending dimensions need to be specified.

Specify the minimum and maximum bar sizes to be used.

Click the Bending Dimensions… button to open the Bending Dimensions dialog, which is used to specify bending dimensions for each bar size.

Links

Specify the strength of steel to be used for the shear reinforcement bars either from the available steel grades or by specifying the steel yield strength to be used.  If a user strength is defined, then the appropriate bar bending dimensions need to be specified.

Specify the minimum bar size to be used from 6, 8, 12, 16 or 20.

Click the Bending Dimensions… button to open the Bending Dimensions dialog, which is used to specify bending dimensions for each bar size.

Note: Unless stated otherwise, the available bar sizes include: 6, 8, 10, 12, 16, 20, 25, 32, 40 and 50

Column Factors tab

SettingDescription
Inclination Specify a value for θi for use in the structural analysis per clause 5.2(5).
Slenderness Criterion Select the slenderness criteria to be used for column design is per clause 5.8.3.1 or clause 5.8.3.3.
Ignore second order effects Select this option to ignore magnified moments accounting for second order effects.
Braced Conditions Specify whether the columns are braced in the local y-y and/or z-z directions.
Effective length factors Specify the effective length factors to be used in the local y-y and z-z directions.
Starter bar area provided Specify the area of starter bar steel (in mm2) to ensure that maximum area of steel is not exceeded by the design.
Max spacing between main bars Specify the maximum spacing to be used between the longitudinal bars.
Min spacing between link bars Specify the minimum spacing to be used between link bars.

National Annex tab

Used to select a Eurocode 2 National Annex, if necessary, and open a dialog for editing National Annex parameters.

SettingDescription
Country Sets the country for which you want to use the National Annex. Select EC2 without Annex to use the EC2 code with no national annex changes or additions or to specify custom national annex values.
Edit button

Opens a dialog for editing national annex values. The dialog opened is dependant on the selected Country option.

  • UK National Annex - Opens the dialog box, which is used editing EC2 values as directed by the UK National Annex.
  • EC2 without Annex - Opens the dialog box, which is used to specify general National Annex values.

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.