TORSION IN COLUMN

[FeliceSelene]

Is it possible to have a huge amount of torsional moment in a single column bent for design of bridges? The superstructure is made of AASHTO girders that were placed above the coping beam.

 

[bridgebuster]

How big is big? What is creating the torsion?

 

[FeliceSelene]

The model from STAAD produced a value of 11000 KN-m. The designer did not release the My in the model though it is free to translate in both directions.

 

[DaveAtkins]

Sounds like a modeling problem--is it really possible for the column to pick up that much torsion? Can the torsion be resisted in another way, such as in the diaphragm (bridge deck)?

DaveAtkins

 

[bridgebuster]

I'm inclined to agree that it's a modeling problem. I can't picture a bridge column experiencing torsion. I'm not saying it's impossible; it just doesn't seem likely.