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What code or book should i use to calculate the design capacity of this particular composite slab? 1

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juandavidguzman

Structural
May 9, 2022
11
The beams are existing ones (as a show on the last photo), then i should pour concrete from above

a_x5fi6m.jpg


This is not the final design, maybe it will have also rebars on the button between beams

b_mvxdnt.jpg
 
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Seeing as you're using metric data, the eurocodes might also be another place to look.
 
I don't know what codes you are using in your country, but I would treat this as a RC slab.

The "reinforcement" would be the steel bottom flanges. They look fixed inside the wall, but I would treat them as simply supported. I would also provide some rebar at the bottom, between steel beams at least.

I would ignore any composite action.
 
When I have seen an embedded wide flange, I usually see some studs or such to transfer shear and force the concrete and steel to act together. Without that shear transfer between them, the only force transfer is "skin friction" which isn't usually all that much.
 

- Yes... you should pour the concrete from above !!!

- The proposed slab reminds an old method and called ( Composite slab , beams encased in concrete ).. The following excerpt is from The Theory and Practice of RC by Clarence Dunham ,1944

- You may approach assuming COMPOSITE ENCASED BEAM for analysis and design .. Pls look EC-4 ( EUROCODE 4)

- A simple calculation ( INP 140 section modulus 80 cm 3, and assuming the loads , proposed slab and tiling DL7 kN/m2 + LL 3 kN/m2, and the span seems around 4.0 m ) shows , the proposed slab is too heavy for existing INP 140 beams ..

- I will suggest you to conduct corrosion study and try to see the quality of steel and consider a light slab ..










Tim was so learned that he could name a
horse in nine languages: so ignorant that he bought a cow to ride on.
(BENJAMIN FRANKLIN )

 
 https://files.engineering.com/getfile.aspx?folder=5a0ab3c4-ca79-403b-bb29-6856f9f252d0&file=Composite_tunnel_slab.pdf
HTURKAK said:
- Yes... you should pour the concrete from above !!!

- The proposed slab reminds an old method and called ( Composite slab , beams encased in concrete ).. The following excerpt is from The Theory and Practice of RC by Clarence Dunham ,1944

- You may approach assuming COMPOSITE ENCASED BEAM for analysis and design .. Pls look EC-4

- A simple calculation ( INP 140 section modulus 80 cm 3, and assuming the loads , proposed slab and tiling DL7 kN/m2 + LL 3 kN/m2, and the span seems around 4.0 m ) shows , the proposed slab is too heavy for existing INP 140 beams ..

- I will suggest you to conduct corrosion study and try to see the quality of steel and consider a light slab .

Hello, thank you for this reply, the specific name and the excerpt are very useful. But, what do you mean by EC-4? are you saying equation number four?
 
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