Composite Beam or Not

[rb192]

One of our GC wants to upset the beam flange in a concrete metal deck (please see attached image). We were wondering if this would be qualify and designed as a composite beam? If we can design as a composite, what percentage of composite action to assume as the beam has no shear studs?

Thanks in Advance!

 

[Agent666]

It can be made composite provided you add some means of transferring the longitudinal shear required. Usually studs, but other means can be used. Check out the slimflor system from the UK for example, using asymmetric beams with a pattern rolled into the top flange some degree of composite action can be assumed.

Also check out this recent thread as it discussed something along the same lines. Check the SCI publications I noted in the linked thread as there was some discussion around the effectiveness of passing bars through the web to achieve some composite action (for serviceability at least).
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