Shear flow adjacent to web
Shear flow adjacent to web
(OP)
Me and my college mate are looking for an efficient method of calculating shear flow in a large concrete member's 'flange' between two voids, to ensure the whole member still acts integrally. We have two walls (acting as webs) integral with a roof slab (acting as a top flange). See attached.
For simplicity sake, let's say the structure is 10m long, 5m wide and 5m high, with 0.5m thick members all round.
What is the best method in determining reinforcement requirements around these void/s to ensure load is transferred longitudinally and hence the flange still acts 'integrally' with the web, as there is a small disconnect obviously from the web for a short distance. One void is directly on the inside face of the web and the other is a little further in.
Can anyone advise on how to best to check our section is adequate, in terms of shear flow between the voids? If we use a FE model, we could extract a horizontal shear stress, but is this then to be checked against allowable shear stress of concrete? Just wondering where the longitudinal rebar would come into play?
Thanks!
For simplicity sake, let's say the structure is 10m long, 5m wide and 5m high, with 0.5m thick members all round.
What is the best method in determining reinforcement requirements around these void/s to ensure load is transferred longitudinally and hence the flange still acts 'integrally' with the web, as there is a small disconnect obviously from the web for a short distance. One void is directly on the inside face of the web and the other is a little further in.
Can anyone advise on how to best to check our section is adequate, in terms of shear flow between the voids? If we use a FE model, we could extract a horizontal shear stress, but is this then to be checked against allowable shear stress of concrete? Just wondering where the longitudinal rebar would come into play?
Thanks!






RE: Shear flow adjacent to web
Dik
RE: Shear flow adjacent to web
Pom in this context is referring to a person from England (slang term!).
Thanks for the input. Do you have any suggestions on how best to justify the flange is adequately functioning either side beyond the void?
AP
RE: Shear flow adjacent to web
...knew that, and, it's generally used as an adjective.
Dik
RE: Shear flow adjacent to web
The holes don't seem to be too substantial and I would run reinforcing on each side of them to match the bars 'cut'. You can do a FEM model that may give you a better idea of the load 'flow' around the openings. The rest of the diaphragm is sufficiently stiff that it will function with the openings pretty much as if it were solid.
Dik
RE: Shear flow adjacent to web
I assume by 'cut' you mean the rebar that would otherwise continue longitudinally where the void is - trimmer bars as we call them here!
RE: Shear flow adjacent to web
Dik