I apologize if this issue has already been resolved in subsequent updates or if I am just misinterpreting what the software is doing, but it looks like XBRate may be double counting the weight of the diaphragm when exporting from PGSuper.
After exporting from PGSuper, the XBRate DC reactions were higher than expected. After comparing them with the PGSuper Pier Reactions report it appeared XBRate was counting the diaphragm reaction twice. This was also surprising since in the XBRate output there is a table showing the lower and upper diaphragm loads separately, so I would expect the DC reactions in the Permanent Loads tab to omit the diaphragm loads.
Thank you for your time,
Eric
| Attachment | Size |
|---|---|
 PGSuper File | 321.25 KB |
 PGSuper and XBRate Load Comparison | 140.5 KB |
Thank you for bringing this to our attention. This is indeed a bug. We will get it fixed for the next release.
Inside the software, we get the total DC reaction from PGSuper and then subtract out the pier diaphragm load. However, the pier diaphragm load is a downward (gravity) load and by the sign convention this load has a negative value. When subtracting the diaphragm load, it actually adds it to the DC load case.
The easy work around for this is to subtract twice the diaphragm dead load reaction reported in PGSuper from the DC in the exported XBRate file.
Thanks again - we will get this fixed.
Sounds good, thank you!