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Prestressed Girder with Flat Slab Bridge Superstructure

Prestressed Girder with Flat Slab Bridge Superstructure

Prestressed Girder with Flat Slab Bridge Superstructure

(OP)
Due to limited options, My colleague was tasked to design a bridge, combination of 36m Type V or VI std AASHTO girder for span 1 and a flat slab bridge of 10m. Steel girder was not included on the options. Another option is the modified type VI, which we designed by increasing the top flanged; came up with number of strands, but opted not to use it.

Question: How and what are the considerations in designing this 2-span bridge?

In the back of my mind, I would try to model it with 1 pier, free at pier for both spans and Integral Abutments.
Another is to model it single span, the pier acting as pier-abutment, integral at one abutment and free at the pier-abutment, the flatslab acting as "long approach slab"

any comments? thanks!

Very Truly Yours,

- andru18

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