Anchorage of mesh reinforcement in a composite slab

[BucklingGuru2718]

I have designed the mesh in a composite slab to resist the longitudinal shear that is caused by the composite action with the steel beams.

Some of the areas in the project are longer span and so I have decided to double up the mesh to provide more reinforcement locally. I need to determine how much anchorage I actually need to provide to these double-up areas of mesh.

Anyone here ever seen a way to calculate this, or perhaps have an idea of how this could be done? I have had a look through Eurocodes 2 & 4 as well as some composite design guides and have not found anything relating to this topic.

 

[BridgeSmith]

For concrete bridge decks composite with steel beams, AASHTO requires longitudinal reinforcing area equal to 0.67% of the cross sectional area of the deck, wherever the tension stress in the concrete exceeds 90% of the modulus of rupture, fr. For normal weight concrete, fr = .24*sqrt f'c.