Plastic Moment
Plastic Moment
(OP)
Hi,
How do I find the column shear that corresponds to a full plastic moment developed in a column assuming the column is fixed at top and bottom? My column is a W 8x21.
Thanks.
How do I find the column shear that corresponds to a full plastic moment developed in a column assuming the column is fixed at top and bottom? My column is a W 8x21.
Thanks.






RE: Plastic Moment
RE: Plastic Moment
Column being fixed is irrelevant if you are already assuming a full plastic moment.
RE: Plastic Moment
Dik
RE: Plastic Moment
Seriously.
Begin rant/ how about drawing an FBD? /end rant
Cheers
Greg Locock
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RE: Plastic Moment
or do you have a column, fixed both ends, with both axial and transverse (= shear ?) loads ? ie beam-column
both cases are available in Roark, etc.
i gather from Dik's post that this section may not be stable in compression (class 1 = stable in compression) so crippling of the compression flange might be the critical compression stress.
Quando Omni Flunkus Moritati
RE: Plastic Moment
A column fixed top and bottom subjected to a normal force applied at mid-height would require force P where PL/8 = Mp or P = 8Mp/L in which case shear = P/2 = 4Mp/L.
A column fixed at the bottom and free to translate but not to rotate at the top would require a shear of 2Mp/L to produce plasticity at each end (same as bookowski).
BA
RE: Plastic Moment
Dik