Combination generator (Indian Standards)

Note: The following are not considered in Combination Generator:

Construction Stage combinations - these must be created manually.
Temperature and settlement loadcase types - these must be added manually.

Open the Combination Generator

On the Load ribbon, click Combination.

The Loading dialog box opens on the Combinations page. On this page, you can see all currently existing load combinations.
Click Generate...

The Combination Generator opens on the Initial Parameters page.

Initial Parameters page

On this page you specify the initial parameters according to your needs.

Delete/Replace combinations

If combinations already exist, you can either delete them, or replace only the ones that have the same names as those generated during this run.
Scenario

The Combination Generator automatically names each combination according to its content.

You can add a Scenario prefix before the generated names or leave the Scenario field blank if a prefix is not required.

By entering a Scenario and selecting the Replace only combinations generated by this run option, you can re-run the Combination Generator to quickly generate additional combinations for alternative scenarios, such as 'Erection' or 'Operating'.

To move to the next page

Specify the above parameters as required.
Click Next.

Combinations page

This page lists the initial combinations to be generated and the strength factors to be applied.

The combination names are generated automatically according to their content and cannot be edited at this stage.

The combinations shown below will only be displayed for your model provided all the loadcase types they contain have Include in Generator selected on the Loadcases page of the Loading dialog.

If there are no temperature loads:
If temperature loads exist:

Note:

If minimum lateral loads have been specified via Home > Model Settings > Minimum Lateral Loads, extra combinations will be created in addition to those listed above to allow the MLLs to be configured on a later page.

To move to the next page

Use the ‘Generate’ box to control which combinations are to be generated.
Should you require, you can also adjust the default strength factors applied in each generated combination.
Click Next.

Service page

This page indicates which combinations are to be checked for serviceability and the factors applied.

To move to the next page

Should you require, you can adjust the default factors applied in each generated combination.
Click Next.

NHF (global imperfections) page

This page allows you to apply the notional horizontal forces specified in Home > Model Settings > NHF (Global Imperfections) for specific combinations.

To move to the next page

Use the Dir boxes to specify the directions in which the global imperfections are to be applied.
Should you require, you can also adjust the default factors applied in each direction.
Click Next, or, if MLLs haven't been requested, click Finish.

Minimum Lateral Loads page

If minimum lateral loads have been specified via Home > Model Settings > Minimum Lateral Loads, this page allows you to apply them. (If set to None this page is not displayed.)

To specify MLLs and generate the combinations

Use the Dir boxes to specify the directions in which the minimum lateral loads are to be applied.
Use the list at the top of the page to select the gravity combination from which the minimum lateral load values are to be calculated.

Note: The combination used for calculating the MLLs can be different to the one to which the MLLs are applied.
Should you require, you can also adjust the default factors applied in each direction.
Click Finish.

The Combination Generator closes and you are returned to the Combinations page of the Loading dialog box. The combinations selected in this run of the generator either add to or replace any existing combinations (according to your selection on the Initial Parameters page).