Axial load level as a percentage of Buckling load?
Axial load level as a percentage of Buckling load?
(OP)
Dear forum members,
I would like to know the level of axial load of a column (or beam) in a concrete or steel frame at service conditions as a percentage of buckling load.(1%, 10%, 50% or what?) Any body has an idea?
Pls help. Thanks very much.
Luke
I would like to know the level of axial load of a column (or beam) in a concrete or steel frame at service conditions as a percentage of buckling load.(1%, 10%, 50% or what?) Any body has an idea?
Pls help. Thanks very much.
Luke






RE: Axial load level as a percentage of Buckling load?
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Allowable column loads are given in Section 3 of AISC Manual of Steel Construction (ASD).
Then a comparison of the two values can be made.
It is unfortunate that the W10x29 size member used in the example at the link above is not modern size (with listed allowable concentric loads), but the principle can be applied to a listed member.
www.SlideRuleEra.net
RE: Axial load level as a percentage of Buckling load?
RE: Axial load level as a percentage of Buckling load?
But I was just wondering about the ratio of the axial load present at that column (not the capacity of the column) to its buckling load.
Thanks so much for your input :)
RE: Axial load level as a percentage of Buckling load?
RE: Axial load level as a percentage of Buckling load?
i think lukeme is after a design guide line for a column allowable (as a percentage of the euler load)
i think it depends on your industry ... i'd be reasonably happy working to 50% to 80% of euler ... anything more i'd want a test. also airplanes are usually more sensitive to local column failures (crippling), and remember that euler critical loads are unreasonable for short columns (refer to euler-johnson)
good luck