Brace Loads
Brace Loads
(OP)
Could I roughly calc a brace compression load by splitting the beam in two & treating the brace end as an end support & resolving for the angled load. Or do you steelwork guys use another formulae for finding brace loads?
As a seperate question, what is the effective length of beam under the loads. I would guess if the brace is strong enough then L is the distance between the end support & the point where the brace hits the beam?
Cheers
As a seperate question, what is the effective length of beam under the loads. I would guess if the brace is strong enough then L is the distance between the end support & the point where the brace hits the beam?
Cheers






RE: Brace Loads
This seismic stuff is mostly above my head and I would say way above your level of structural knowledge.
Effective length is complicated on this and could be longer than the actual length depending on how restrained the beam is.
RE: Brace Loads
P-Delta analysis brings the structure to a stable deformed state as if nodes are prevented of further lateral movement, i.e., a non-sway braced state, so K=1 is safe.
All this assuming forces standing in the section do not require axial and bending stiffess degradation to properly account for material nonlinearities, in which case such degradation should be considered with properly corrected input data.
RE: Brace Loads
Only problem is the effect of out of plane buckling if it is analysed as a plane frame. Just remember that the OP is an ME not an SE.
RE: Brace Loads
cds72, your original answer satisfies me.
Thanks