P-delta effect for steel structure
P-delta effect for steel structure
(OP)
What percentage the p-delta contribute to stress ratio
for column of steel structure you found?
I got 1% for braced frame and 5% for moment resistent frame.
for column of steel structure you found?
I got 1% for braced frame and 5% for moment resistent frame.






RE: P-delta effect for steel structure
RE: P-delta effect for steel structure
I see.
Just want to know a common situation. For example, one would like to control KL/r around 90-150 for column.
p-delta effect was some thing we can control by change the
rigidity of structure, as I understand. Similar as KL/r, I think it may have a allowance value.
RE: P-delta effect for steel structure
I don't know off-hand what it would usually be for buildings. I don't really consider them without p-delta to know the difference. It would be proportional to the gravity load and the drift - both of which can vary from job to job.
RE: P-delta effect for steel structure
It really depends on how slender the structure is.
I expect that your code would give you a maximum allowable before you have to do an advanced analysis.
RE: P-delta effect for steel structure
This can increase if there are very few moment frames with a lot of "leaning" columns that don't participate in resisting the lateral forces.... more common for structures where the lateral design is entirely controlled by wind.