| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | Load case |
| Date Logged & Current Version | July 2021 12.06.00.48 |
Problem:
How you define an occasional load case in AutoPIPE?
Sometimes in the past we have put a force into the model (such as a transient hydraulic force) to be analyzed as an occasional load. When you add a concentrated force into AutoPIPE, you simply pick which load case it is going to be combined with (such as the Gravity load case). Does that mean that force becomes analyzed as a sustained load then? We would really need that load analyzed as an occasional load, as there are different criteria for that type of load case.
Solution:
AutoPIPE automatically determines the applied load based on the type of load case it is applied too. So yes a load added to GR would be considered with sustained stress. For occasional loads these should be added to an occasional load case like Wind, Earthquake etc or for greater flexibility assign the concentrated load to a User case (U1..U140) and manually add this load to the Code and Non-Code combinations. This would be static loads but for fluid transient you should use dynamic load cases like Time History. AutoPIPE reads in .FRC data from 3rd Party dedicated Fluid Transient tools and also has a fluid transient feature (Loads > Fluid Transient). In both cases dynamic time history loads are automatically created and the result is considered an occasional combination by default.
See Also
"Occasional" - AutoPIPE load case