Angle to HSS Moment Connection 4

[SixkHz]

I'm reviewing the connection for a cantilevered L3x3x0.5" angle welded to the side of an HSS6x4x0.25". There is a load at the tip of the angle resulting in a moment at the interface of the angle and wall of the HSS (see attached sketch).

The angle strength is fine, and the weld is fine, but I'm having trouble trying to check the plastification of the HSS wall.

I tried using the AISC Design Guide 24 assuming just the vertical leg of the angle is effective (ie. acts like a transverse plate), but the plate formulas only cover axial load, not moment. I also tried using the HSS to HSS moment connection formulas (again considering only the vertical leg of the angle), but the Hb/Bb ratio is < 0.5.

Any help would be appreciated.

 

[ishvaaag]

So you in each component plate profit from it showing the same plastic strength in any direction, take angles equal to the slopes since small and sum all over the component plates and directions. Thanks, BAretired, if I had seen this I didn't remember.

 

[BAretired]

Yes ishvaaag, having the same plastic strength in any direction simplifies the problem, but a similar technique exists for variable plastic strength.



BA

 

[Goin4SE]

sixkHZ,

I did my MS Thesis on HSS connections and used JA Packer's book "Design Guide for Hollow Structural Section Connections", extensively. I remember that there were some examples that pertained to your exact situation and it involves several different equations. I would suggest that you get a hold of this book at your local university library.

 

[BAretired]

Goin4SE: The Henderson Packer book "Hollow Structural Section Connections" is okay, but I did not find this particular problem. Could you refer me to a page in that book?

BA

 

[SixkHz]

jeff91: I started with this approach but these members consist of 316L stainless steel with a yield strength of only 25 ksi, and designed with a 2x safety factor (ASD).

Goin4SE: I also have the book you referenced, but like BAretired I couldn't find an applicable example. If you could provide a page reference that would be great.