Reinfroced concrete column K factor 2

[Gus14]

I have a column supporting a transfer girder as shown in the attached sketch. The column has a transfer girder framing into it's weak axis, however the strong axis is not framing into a slab or a beam and hangs freely, I intend to use K =2 for the column around the strong axis. Still with K=2.0, I still don't think the strong axis will control the design, since it's pretty stiff. What do you think ?

 

[BAretired]

The major axis is well supported by the transfer girder which is laterally braced by the rightmost beam; if your sketch is drawn to scale, it won't control the design.

 

[HTURKAK]

The strong axis is also framed with transfer girder ..

Consider


Ψ = ratio of Σ(EI /Lc ) of all columns to Σ(EI /Lb) of beams in a plane at one end of a column

EI /L is bending stiffness of the element. In this case , you shall consider the torsional stiffness of the girder ..

First check if the frame is Nonsway frame or not and calculate Ψ

For strong axis Ψ = Σ(EI /Lc )/ Σ(GJ /Lb) ( G = shear modulus , J= Polar moment of inertia )












I cannot give you the formula for success, but I can give you the formula for failure..It is: Try to please everybody.

 

[Gus14]

Thank you BAretired and HTURKAK for replying. Your answers make sense and will be very helpful for me in future projects.