Moment Connection Values for Design
Moment Connection Values for Design
(OP)
I need some assitance in determining the values for moment connection designs. We have to provide the value of the moment connection at the joints that are fixed in a rigid frame for the steel fabricator to do the MC design. I used P-Frame Lite to complete the rigid frame analysis and have all the moment loads for the different members ending at that joint. However when I sum the moments at that joint it = 0, which means there is equilibrium at that joint and the moment has been distributed to each member. What value to I give to the designer to design the moment connection?
Thanks in advance for the advice.
Thanks in advance for the advice.






RE: Moment Connection Values for Design
RE: Moment Connection Values for Design
RE: Moment Connection Values for Design
DaveAtkins
RE: Moment Connection Values for Design
If you are useing a full penetration welded moment connection, there is no "design". As I stated before, the welding fu8ully connects the beam to the column so the full capacity of the member is achieved.
RE: Moment Connection Values for Design
RE: Moment Connection Values for Design
I agree that if the fabricator provides a full pen weld. there is no design value. the original post says nothing about a full pen weld or developing the full capacity of the member. there is no reason to develop the full capacity unless required to by the forces induced. the exception to that being the aisc seismic requirments which require a certain percentage of the section's capacity be developed. a moment connection designed for some percentage of the maximum moment is still a "fixed" connection as long as it can not rotate under design events.
Nicholi,
yes i typically put a reaction value on plan at the end of the members framing into the column. i would not use less then 50" of the capacity of the beam as standard practice or 125% of the calculated reaction which ever is greater.
RE: Moment Connection Values for Design
RE: Moment Connection Values for Design
RE: Moment Connection Values for Design