I am using LEAP CONSPAN for a PS/PC wide flange girder analysis. I do not believe the shear capacity provided by the stirrups is being calculated correctly because the shear capacity is nearly constant across the beams even though the stirrups are spaced at 3.5" at the ends and 10" in the middle. Is it possible that the shear capacity is not being limited by Vu/phi as per AASHTO 6th 184.108.40.206? Or is it possible that the stirrup area in in2/ft is being applied at the specified stirrup spacing, therefore applying a much higher stirrup area than what is actually provided?
Ordinarily, we design beam connections to be nominally pinned, and then check only for shear. If you do require bending fixity at the support, you'll have to have an extended (perhaps stiffened) end plate. The flexibility of the anchors and the concrete structure are likely to reduce the fixity considerably, so you might be better off designing a pinned connection anyway.