RE: Design Parameters > Moment Provisions > Negative Moment Options

Krista Murphy — Fri, 03 Dec 2021 12:53:50 GMT

Thanks Vinay.

RE: Design Parameters > Moment Provisions > Negative Moment Options

Vinay mysore — Fri, 03 Dec 2021 12:52:50 GMT

you are welcome

RE: Design Parameters > Moment Provisions > Negative Moment Options

Vinay mysore — Fri, 03 Dec 2021 05:43:38 GMT

Explanation as per the LBC User Manual.

Negative Moment Reinforced Design :

Precast/Prestressed Girder can now compute the negative moment reinforced design Moment (Mu), excluding the non-composite moments
as an alternative option. By default, non-composite moments in Mu options will be selected in order to have backward compatibility
with files generated using older versions of the program. Select the Non-Composite Moments in Mu option to exclude the effect of
moment due to self weight of the beam and slab from the total negative moment on the section. When a user chooses to exclude non-composite effects,
Precast/Prestressed Girder also removes the moment due to diaphragms or moments due to dead loads on the precast beam.

For more information related to Leap Bridge Concrete program please check the wiki articles in the below mentioned Bentley Communities link.

https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/2440/leap-conspan-precast-prestressed-girder