Good morning,
We are modeling some existing bridges with a non-standard prestressing design with some debonding to check their load rating. When checking the prestress losses, we have noted that they are about 40%. There is a factor that reduces the effective prestress force called "Prestress transfer length reduction factor". We noticed that this factor is 1.0 at the end of the girder and goes all the way down to 0.762 (0.762 = (Area of non-debonded strands)/(Total area of strands)) in the center of the girder.
I'm attaching a screenshot of the results for the effective prestress force as an example as well as the prestressing pattern for that girder.
We have checked that the debonded lengths are on the edges of the girder and not the center.
Is there a known issue with the BridgeLink v7.0.2.0 not calculating the effective prestress force correctly when using a non-standard/entered manually strand pattern with debonded strands?
Is there a way to modify this factor ("Prestress transfer length reduction factor")?
Thank you!!
| Attachment | Size |
|---|---|
 Prestress patern and effective prestress force | 162.5 KB |
There was a problem with nonstandard debonded strands that was fixed in 7.0.4.
Not sure if it applies to your case. Please share the input file for a specific case.
Thank you for your answer!
I've tried uploading the input file to my first comment but it won't let me attach it here in my response. Is there an email address where I can send it?
Thanks!