seat angle connection

[ToadJones]

I have a connection that employs a seat angle supported on two gussets; one gusset on either end such that the angle is simply supported.
A hanger rod is bolted through the seat angle in the center of the span.
What is a good approach to checking local bending in the seat angle?
I used an approach I have used before for checking local flange bending in underhung monorails, but if I employ this method, the bending stress in the angle leg is very high. The method I am using is a more or less a yield line approach using a 45º yield line back to the "k" distance on the angle in order to get a bending width for calculating the section modulus.

 

[BAretired]

I would use a yield line approach too, but the angle may not be 45 degrees. Are you considering any fixity at the gusset plates?

BA

 

[BAretired]

Simply supported, okay you are not considering fixity at the gussets.

BA

 

[connectegr]

How long is the angle? Is the concern deflection of the angle between the gusset supports, or bending of the angle leg? Can the angle be stiffened locally on either side of the hanger? Do the gussets provide this reinforcement? How eccentric is the load? 4" leg loaded at 2" from heal, or 8" leg loaded at 6"+ from heal?

We axis bending of the angle leg, but what is the tributary length? Yield line can be time consuming. Local stiffening may be quicker (i.e. cheaper)

http://www.FerrellEngineering.com

 

[BAretired]

I find the yield line method very fast.

BA

 

[ToadJones]

Angle is L6x6x1/2 supported on gussets that are 12" c-c.
It is an existing connection.

The hanger rod is 4" from the heal.
I am wondering what is the best way to check this design. From doing a quick yield line the stress is very high.
Also, I cannot really just analyze this as a simply supported beam as the 4" eccentricity from the shear center will cause torsion, no?
The angle will not bend about the geometric axis.