| Applies To | |||
| Product(s): | AutoPIPE | ||
| Version(s): | 2004, XM, V8i | ||
| Environment: | N/A | ||
| Area: | Calculations | ||
| Subarea: | |||
| Original Author: | Bentley Technical Support Group | ||
| Date Logged & Current Version | Sept. 2015 09.06.02.06 | ||
Problem:
If set input grids to"Restrained" and
On Tools> Model Options> Results> don't check "Use rest. Long. Code eq."
This seems to be wrong a warning should appear, correct?
Solution:
The restrained / unrestrained / Equivalent / Show Both Xtra Data options are only used for controlling which code combinations shall be displayed on the output report. These options do not affect the calculations performed for the combinations.
The Result Model Option "Use rest. Long. Code eq." however, decides how the longitudinal stress values are calculated for restrained code combinations like "Rest-Fun" and "Rest-Env". If this option is checked, the axial expansion stress would be calculated as prescribed by the code i.e. E*alpha*dT regardless of the pipe being fully restrained or not based on actual support (soil) stiffness values.
If however, this option is unchecked, then AutoPIPE uses the actual thermal forces developed due to the actual restrain conditions.
Also, if checked, AutoPIPE will use a value of v*Hoop stress for calculation of longitudinal pressure stress.