To apply a strain load to a member

To assign a load due to a uniform strain (due to temperature or other source) to a member, use the following procedure.

Select the members that will all have the same strain load applied.
On the Member ribbon tab, select the Strain tool in the Loads group.

The Add Strain Load dialog opens.
Select the Load group or case to which the load will be added from the drop-down list.
Select the method of specifying the strain load:

Strain

or
Strain Rate
Type the Extended By value for the selected strain method.
Click OK. The dialog closes and the load is applied to the selected members.

You can edit temperature load values for the current load group or load case by selecting the Strain temperature load tool in the Members group on the Spreadsheet ribbon tab.