STEEL BEAM TO RCC COLUMN CONNECTION DESIGN 1

[Tstruct]

Hello,
I have to design a connection of steel beam (wide flange) to a existing RCC column, refer attached photo to get the idea of what I am trying to do. For the design of end plate, I am thinking of designing it like a simple base plate of a column subjected to moment and horizontal force. Is it right or do I have to consider something else? Also please advice anything useful regarding such connections.

Thanks.

 

[HTURKAK]

For the design of end plate, I am thinking of designing it like a simple base plate of a column subjected to moment and horizontal force.

I think the force should be vertical ,not horizontal and , i would prefer shear connection with horizontal slotted holes to limit the moment and provide some erection tolerance .
EDIT; The base plate to existing column should be similar to the following figure but in this case, post installed epoxy anchors should be used .

 

[jerseyshore]

If you are connecting to the inside of two concrete columns then having a way to allow for some tolerance in the field definitely makes sense.

Typically we'll use Hilti epoxy anchors for this. I don't like using expansions anchors anywhere near the edges of a concrete member.

 

[ANE91]

Consider having your contractor run a GPR over the column face to map out where the long. bars and ties are, so that you can avoid drilling into them. GSSI makes a mini GPR that is perfect for this scenario.

 

[KootK]

My preference:

1) Have a single angle shear connection shop welded to a rectangular plate. The two sided-ish weld thing to provide some rotational ductility.

2) Bolt the plate to the column taking care to miss rebar. Horizontally slotted holes in the plate can be used to facilitate this a bit.

3) Use horizontally slotted holes in the beam for some erection tolerance.

4) Design the beam pin-pin and stiff. A stiff beam is your friend when it comes to minimizing incidental end moments.

 

[milkshakelake]

Why not consider it a moment connection, like a fixed column base plate? I'm curious.

I would consider it to be pinned, as I never consider post-installed things like this to be moment-resisting. But I don't have a good reason for it. I just don't feel comfortable specifying a moment connection with post-installed anchors, which may be a fallacy.