Catjacob
Civil/Environmental
- Nov 23, 2006
- 37
When I learnt prestressed beam design at college, the section properties (e.g. I value) of the girder don’t change with time or construction stage on which equations or inequalities for the estimations of prestress force and I value are formed.
However, the current problem is a beam and slab that concrete is poured on the top of the prestressed beams to form a “slab”. Thus, the section properties of the structure at “transfer” and “service” are different.
Could any bridge man tell me how I can estimate the required prestress force (and min Z values)????
However, the current problem is a beam and slab that concrete is poured on the top of the prestressed beams to form a “slab”. Thus, the section properties of the structure at “transfer” and “service” are different.
Could any bridge man tell me how I can estimate the required prestress force (and min Z values)????
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