Rating with OL1 and OL2 Permit Trucks

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CraigM
Rating with OL1 and OL2 Permit Trucks

The OL1 & OL2 trucks that are predefined in the PGSuper libraries apply a 200 plf lane load to any span greater than 0ft, and this should be changed to any span greater than 200 ft per Chapter 13 of the BDM (or when checking negative moment on multi-span bridges). The problem I have is that the OL1 and OL2 trucks are locked from editing. When I create a copy of the trucks to modify for the above criteria, the WSDOT Rating Report flags me for errors because the modified permit trucks can't be named OL1 and OL2 wich is a requirement to create a report summary.

Rick Brice
OL1 & OL2

You can create your own version of the OL1 and OL2 trucks. If their names starts with "OL1 " and "OL2 " you can create a WSDOT Load Rating Summary Report.
The handling of the OL1 and OL2 doesn't match our BDM exactly because the requirements changed after the software was written. I'll get it fixed up for the next release.
Rick
Richard Brice, PE
Software Applications Engineer
WSDOT Bridge and Structures Office
 
 

CraigM
That is not my experience. I

That is not my experience. I have tried creating new trucks with the name "OL1 (copy)" and "OL2 (copy)", and I get the same results. See attached pdf.

Is there a way to unlock the library trucks for editing?

Thanks,
Craig

Craig A Mallow

Rick Brice
Dang!... I ran a few tests

Dang!... I ran a few tests and it seemed to be a work around. I'm getting the same experience as you.
You can't unlock the library entires because they are on WSDOT's servers. What you can do is change the configuration of PGSuper so it isn't using the WSDOT library. Then, when you open your file you can edit the OL1 and OL2 trucks. As long as you are not configured to use the WSDOT library, the library entires that you are using will be editable.
To change the configuration, close your PGSuper project and select File | Configure PGSuper. You can use the AASHTO configuration from the WSDOT server or you can use the TxDOT configuration from the TxDOT server.
After the configuration is changed, open your PGSuper file and edit the OL1 and OL2 trucks.

CraigM
Success!

Thanks Rick.

Craig A Mallow

Rick Brice
I'm working on a

I'm working on a permanent fix for the problem. Hopefully I can get it out in a couple of weeks.

Rick Brice
Craig,   I recently posted

Craig,
 
I recently posted PGSuper version 2.6.1. It addresses the issue with the OL live load as well as the WSDOT Summary Report.
 
Rick

Tony Dubovik
PGSplice

I recently ran the 6 Girder example from the Spliced Girder Design evaluation in PGSplice version 7.0.1 [2/10/2009] and found that the long term losses for the Post-Tensioning were around 5.3 ksi. This seems low compared to the lump sum losses from the design exmaple of 32 ksi. Did I miss something or are the losses really this small.

Tony Dubovik

Rick Brice
5.3 KSI losses does seem kind

5.3 KSI losses does seem kind of small. Please post your PGSplice file and the example and I'll give it a quick review.

Rick

Richard Brice, PE
Software Applications Engineer
WSDOT

Tony Dubovik
PG Splice

Thanks Rick

Tony Dubovik

Rick Brice
PGSplices

I think you are missing something. When I run you file the post-tensioning losses are 27.3KSI at the live end and 24.7KSI at the dead end. I found this in the Loss Details chapter of the Details Report.

Rick

Tony Dubovik
PG Splice

Thanks for looking at this. Sorry for the confusion but I was referring to the long term losses.

Tony Dubovik

JBE_DHA
PGSplice & Long Term Losses

I'm having a similar issue for a project that I'm working on. I'm using PGSplice version 7.0.1. I'm only getting about 2 ksi for long term post-tensioning losses, which seems way too low. I'm attaching my PGSplice file. Any help would be greatly appreciated. Thank you.

Rick Brice
losses

Sorry I haven't had a chance to look into this issue yet. It seems that the low values of long term losses occur with the PT is applied after the deck placement. One thing to note is that the DeltaFpLT term includes elastic effects as well.

Have you checked the loss calculations to confirm that, for the calculation procudure used, the computations are correct?

WSDOT is currently developing a completely new version of PGSplice and we don't have much if any resources to dedicate to current version 0.7 of the software.

Best regards,
Rick

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