Concrete Beam Connection to Steel Column
Concrete Beam Connection to Steel Column
(OP)
I have a slab that is being repoured and in one section I have to attach a 12" x 24" beam to a the flange of a W12x53 column. Any suggestions? I've already asked my boss to use a single shear plate with some shear studs on either side, with the amount required to transfer required shear, but he'd like some other ideas.
Another thought is put some embed plates on either face and remove small portion of formwork at end of beam and weld plates to the column.
Anyone have any details for this type of connection?
Another thought is put some embed plates on either face and remove small portion of formwork at end of beam and weld plates to the column.
Anyone have any details for this type of connection?
RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke






RE: Concrete Beam Connection to Steel Column
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RE: Concrete Beam Connection to Steel Column
RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke
RE: Concrete Beam Connection to Steel Column
Can your column take the additional moment due to end restraint?
RE: Concrete Beam Connection to Steel Column
One step further might be to cast a embed plate into the bottom of the concrete beam (much as a precast concrete supplier would do), let the CIP concrete go through intial curring and shrinkage, and weld the embed plate to the seat angle 30 or 60 days after casting the concrete.This would relieve some of the shrinkage problems.
RE: Concrete Beam Connection to Steel Column
You could add some headed anchors as well to tie the two together. The saddle would take 100% of the vertical shear load. Then you could weld deformed bar anchors to the column and extend them into the beam to develop any horizontal tension load that would occur.
RE: Concrete Beam Connection to Steel Column
Is there a threaded deformed bar product available where you are? I would use Reid bar and simply drill top and bottom steel into the existing column (having first checked that the reduced section isn't of concern). This done, box up and lap onto the "starters". Very similar to the nelson stud idea, only easier.
Check out http://www.reids.co.nz/
Cheers,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...
RE: Concrete Beam Connection to Steel Column
Otherwise, with a bracket or bucket formed on the column, you can treat like pinned connection, particularly if you add neoprene bearing pad. Only moment would then just be from load eccentricity.
RE: Concrete Beam Connection to Steel Column
Please correctly if you believe I am wrong, however, IF you've got a existing column that was sized for a beam framing into the "far" side, and you now add a concrete beam to the "near" side, you've actually improved the behaviour of the column, n'est pas? This, of course, requires a check of the newly increased compressive load and actions on all supporting structure (including foundations), but fundamentally the local behaviour of the column should be improved... There is no way to discuss the overall system in general and I do not try; Just thinking about the column itself.
What do you think?
Cheers,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...