Designing a concrete girder with a top and bottom flange
Designing a concrete girder with a top and bottom flange
(OP)
What value of b (width of beam) would I take if my concrete girder has a small flange top and bottom in the calculation of flexural resistance? I am curious what normal practice is. Also, how would shear reinforcement look for a girder of this shape? Much thanks.






RE: Designing a concrete girder with a top and bottom flange
Find a T-beam example in a concrete textbook and you'll see exactly how to do this. The tension-side b won't come into play for flexural calcs.
Stirrups depend on the proportions. Almost certainly will have a typical looking stirrup in the web, but might also have a rectangle enclosing the bottom flange.
RE: Designing a concrete girder with a top and bottom flange
Consider prestressed concrete bridge girders with an I shape. They are only shaped that way to allow more prestressing strands at the bottom of the section.