Hi,
I am working on the 80' prestressed concrete beam with a few debonded tendons. (Picture below)
I am trying to see how moment capacity changes with the change of debonded length of the tendons.
Below are the outputs for the provided moment with the debonded length of 1'.
When the debonded length is changed to 15' the provided moment increases (picture below), which is counterintuitive. I am trying to understand why the "moment provided" increases when the debonded length is increased.
i see that the Mu provided increased only at 0.3/0.7L , elsewhere the Mu Provided has remained the same or decreased.
It is difficult to figure why the program is behaving like this .
Please email me the concerned LBC file to "vinay.Mysore@Bentley.com" so that can investigate this issue.
Or log a service request and include the files for investigation. How to log Service Request? -
https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/52987/how-to-log-service-request
When the Prestressing tendons apply load to the structure, the resultant forces and moments generated can be considered as a combination of primary and secondary or parasitic effects. No secondary moments are set up for a theoretical beam with a concordant tendon arrangement, but this rarely occurs in practice.Clover Dashboard
The effect of excessive debonding of prestressed strands can present a marked impact on the shear performance of prestressed concrete girders. No secondary moments are set up for a theoretical beam with a concordant tendon arrangement, but this rarely occurs in practice. SkyWard Alpine Login