unreinforced concrete slab 1

[morganjoe]

Can anyone tell me the procedures, assumptons, and formulas to use when checking a thick unreiforced concrete slab. I am thinking that if the slab is thick enough you just need to check the shear values because the tension steel will not develope. Is there a ratio of length to depth, or other guidlines on when this assumtion is correct?

Any help would be greatly appreciated.

Thanks

 

[chicopee]

Morganjoe- Are you sure that your socalled concrete slab in the cofferdam is not actually a so-called "mud slab" which is a weak concrete mix for the purpose of providing a clean bottom before other works are carried out?

 

[morganjoe]

The slab is not a so-called "mud slab" or "rat slab", it will be in place to resist hydrostatic uplift forces. I looked into fiber mesh, but this is for the durability of the concrete and not intended to replace structural reiforcement.

 

[swivel63]

so what is this thing sitting on? any supports or is it a slab on grade?