Using the Steel Connections: Gusset Plate (Bracing) extension, you can generate a gusset plate connection (bracing).
At the top of the dialog are 2 selection lists:
You can select a connection name and / or number from these lists or specify a new number or name.
At the bottom are 3 buttons:
Details concerning the calculation algorithms for steel connections can be found in the main Autodesk® Robot™ Structural Analysis help file (see Steel Connection Design).