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Negative Moment Steel in Girder
Does PGSuper have the capability of placing negative moment steel in the girder for a multi-span bridge that is made continuous without the use of a deck?
Even though you cannot model the negative moment reinforcement, you can model the girders as continuous. In the Bridge Model Plan View, right click on the intermediate pier and select "Continuous Before Deck Placement". This will make the girder continuous before the deck (no used in your case) and superimposed dead loads are applied.
Rick
Richard Brice, PE
Software Applications Engineer
WSDOT Bridge and Structures Office
As per my knowledge in Girder design and analysis software you can not place negative moment. But still check with updated versions and information of PGSuper because I use it few years before.
You can model negative moment reinforcement in the bridge deck. PGSuper will check the flexural resistance against the Strength I and Strength II moments.
I noticed you put a link for Stainless Steel Round Bars in your post. Do you have a particular application in mind that you would like to have PGSuper model?
Rick
Richard Brice, PE
Software Applications Engineer
WSDOT Bridge and Structures Office
No, there is no way to tie girder bars or strands over piers to handle negative moment.
This is a hack, but the only work-around I can think of is to input a very thin, low modulus deck and add deck reinforcement. You can enter a negative value for the bottom mat cover to put the bars down into the top flange of the girder.
If you do this, you may need to manually input live load distribution factors based on the no-deck configuration. As always when you are tricking a program - check the numbers carefully!
Richard Pickings, P.E.
BridgeSight Inc.