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T.2 Assign loads to load cases

  1. On the Spreadsheet ribbon tab, select the Load Cases tool in the References group.

    The Load Cases spreadsheet opens.
  2. For Load 1:
    1. Type Dead Load in the description field of Load case 1.
    2. Select Dead as the Type.
    3. Type -1 in the Self-weight multiplier in field Y.
      Note: This value is negative.
    4. Press <Enter>.
  3. Select the beam members (M2 and M5).
  4. Add the uniform distributed dead load:
    1. On the Member ribbon tab, select the Distributed tool in the Loads group.

      The Add Member Distributed Load dialog opens. The Load group is already selected to use Load case 1.
    2. Select the Load type as Uniform.
    3. Select Global Y as the Direction.
    4. Type -400 kg/m in the Magnitude field.
      Note: This value is negative and uses different units than the default, so be sure to type out the units as indicated above. It will be automatically converted into the default units of kN/m.
    5. Click OK.
  5. Create the live load group:
    1. On the Model ribbon tab, select the Load Case tool in the Load group.

      The Add Load Case dialog opens.
    2. Type Live Load in the Description field. Leave the Name as Load Case 2.
    3. Select Live as the Type. Leave the self weight modifiers all as zero.
    4. Click OK.
    The live load case is added and selected as the active load case as indicated in the application status bar.
  6. Repeat steps 3 and 4 except to add a uniform distributed load of -600 kg/m (in the Global Y direction) to the beam members (M2 and M5).
  7. Repeat steps 5 and 6 except to add a Load case 3 with a description of Wind Load and type of Wind. This load group will have the following to load items:
    • a uniform force of 300 kg/m in the Global X direction and is applied to the left column (M1).
    • a uniform force of 500 kg/m in the Global X direction and is applied to the right column (M4).
As this model uses a second-order, P-Delta analysis, load combinations are not recommended. Instead, repeat loads will be used to combine the load cases so that the combinations are processed by the analysis engine directly. These Repeat loads will be added in the Analytical Modeling workflow.

Refer to TR.37.2 P-Delta Analysis Options for further details on load types appropriate for P-Delta analysis.