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Time-history analysis may be initiated using the process which follows:

1. Create the model and assign support conditions to restrained joints.
   
   
2. Select Define > Functions > Time History to define a time-history function which characterizes load variation over time.
   
   
3. Assign load conditions to the model through Assign > Joint Loads or Frame Loads.
   
   
4. Define either a modal or direct-integration time-history load case through Define > Load Cases.
   
   
5. To customize load application, enter, on the Load Case Data form under Load Applied, the following fields:
   
   
   • Load Type. Select the Load Pattern option.
     
     
   • Load Name. Select the Load Pattern to be applied.
     
     
   • Function. Select the time function which characterizes load variation in time.

See Also

• CSI Analysis Reference Manual (Linear Time-History Analysis, page 353) and (Nonlinear Time-History Analysis, page 403)

• Verification Examples

• Example Problems

• Multi-support excitation article