Post-Tensioning of AASHTO I Girder Type LEAP Bridge Concrete

Hi ,

There is no option for Post tensioning option for AASHTO I Girder in LBC .

But there is a workaround solution for this issue . In LBC there is a module to design POST TENSIONING Box girder, T beams and Slabs .

1) In ABC wizard user needs to select Post Tensioned CIP Box and Boxes option and select the number of span as 1 and input Interior Girders as 1.

2) Click Next and Next and model the bridge .

3) Then go to Superstructure TAB and click on CIP RC/PT Girder and then in the new window click on Geometry TAB and then click on Cross Section button.

4) In the Cross Section layout window click on Section button and in the new window get rid of Exterior girders and modify the width, Depth and other important information and click OK. These modification can be done as per AASHTO standards

5) Then the user should be able to see I girder in the section .

In this way the user can design only one girder at a time and it is not possible to design multiple girders at the same time.

Please see the attached screenshots for more information.

Hi Vinay,

It looks like this method only works for a single I girder. Is there a solution for Post tensioning option for Open Box Girder in LBC? I am trying to apply post tensioning for open box girder.

Many thanks,

Jun

If you can model the Box girder then Post tensioning can be applied as well.

Please provide me the screen shot of cross section of the bridge then i should be able to guide you better.

Thank you, Vinay! The cross section is shown as below.

This is from Conspan module and currently it is not possible to perform Post tension analysis.

I apologize for the inconvenience.