Beam-Column Joint Shear Failure

[yapitasarim]

Hi,

let's say you have to design a RC building in a highly seismic zone and your structure has highly ductile moment frames, aka Special Moment Frames. You have to design the beam-column connections of this structure, obviously. Let's say one of these connections has three beams of those special moment frames and one cantilever beam framing into this connection.

My question is: Would u neglect the cantilever beam while u design this connection? e.g. neglecting any kind of force transferred into the connection from this cantilever beam due to gravity and/or vertical component of the earthquake force etc.

U can refer to every code and/or explain technically why u would/not neglect the cantilever beam in such a connection. Thanks in advance.

 

[X4vier]

I think neglecting it is conservative. I don't remember any reference to that case on ACI318. Sorry

 

[yapitasarim]

@X4vier

so, u would neglect it?

ACI 318 says that u have to take into account all the forces acting on that connection. Why would u neglect it?

 

[X4vier]

For my part I would not neglect it, what I am saying is that neglecting it is conservative because those forces stabilize the node.

 

[yapitasarim]

@X4vier

Can u pls explain further what u mean by "stabilizing the node"?