Braced frame deflection calculation
Braced frame deflection calculation
(OP)
Hi all,
I'm looking to calculate the relative stiffness of a number of braced steel frames on a 3 storey building using the unitl load method.
I've come up with the bones of the derivation (I think it's correct!) but I'm finding that the defleciton that I'm getting for the frame differs from that of my anayslis in ROBOT (Robot gives deflection of 0.45 at top of frame, I get 0.42).
I've attached my derivation attempt and the calculated deflection. I would be very thankful if some of you could have a quick look and see if the derivation makes sense to you/if anything jumps out as being wrong.
Thank you
I'm looking to calculate the relative stiffness of a number of braced steel frames on a 3 storey building using the unitl load method.
I've come up with the bones of the derivation (I think it's correct!) but I'm finding that the defleciton that I'm getting for the frame differs from that of my anayslis in ROBOT (Robot gives deflection of 0.45 at top of frame, I get 0.42).
I've attached my derivation attempt and the calculated deflection. I would be very thankful if some of you could have a quick look and see if the derivation makes sense to you/if anything jumps out as being wrong.
Thank you






RE: Braced frame deflection calculation
RE: Braced frame deflection calculation
RE: Braced frame deflection calculation
Usually hand calculations only consider the brace stiffness for lateral drift. I think the equation is: K = (AE/L)*(cos O)^2.
RE: Braced frame deflection calculation
(Either this is a homework problem or you have a huge budget for your project
RE: Braced frame deflection calculation
Thanks for your responses guys.
RE: Braced frame deflection calculation
RE: Braced frame deflection calculation
should the deflection be factored by h3/L to create a lateral component ?
Is the lateral deflection correct for the diagonal ? *(d3/L) or *(L/d3) ?
another day in paradise, or is paradise one day closer ?