Partical Moment Connection 5

[haynewp]

I have modeled a basic steel moment frame. The fabricator has shown a bolted angle at top and btm of the beam. I figure this to be about 60% of fixed. I cannot model partial moment connections in the software I have.

I am trying to determine the negative effects this would have on my frame, since it was modeled at 100% fixed. What comes to mind is increased deflection and p-delta effects.

What is the best way to figure the effects for partial fixity connections in frames?

 

[MatthewC]

FEMA 350 has a prequalified partially restrained connection using two WT sections at the flanges (3.7.1). It also has design procedures to size the connection properly, and an equation for calculating the stiffness of the connection. Using this stiffness, you can then model the beams with an equivalent EI, as Taro suggested earlier. This information is in FEMA 350, chapter 4 (4.5.2.2.2). This will give you the expected drift you are looking for.