Column Design: Minimum moment and biaxial bending

[N.K.]

Hi Guys,

I am currently designing a rather slender column with a very heavy load on it, Upwards of 1MN. I just wanted to ask people's opinion on designing this column for minimum moment.
Due to the size of the column the minimum moment eccentricity exceeds the allowable tolerances stipulated in the code. Does the minimum moment still need to be applied fully? I do not think such a deviation in straightness should even be allowed for such a heavy column and therefore I think the minimum moment may be excessive.
Furthermore, would we check the column biaxially for minimum moment (when magnified). The way I understand it is that each axis needs to take a nominal moment but I did not think that also applies biaxially. If I was to resolve the biaxial minimum moment into eccentricity then it is very slanted.
Any advice would be helpful. Thank you!

 

[rapt]

You have not said how much moment the column actually attracts in your earthquake/wind analysis. Do you have a figure?

 

[dik]

First Kick at the Cat... (put on my steel toed boots)...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

and *.pdf...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[hotmailbox]

Very nice calculation sheet, dik. I want to some simple spreadsheet using SMath and yours is what I need to get started. Thanks for sharing.

 

[dik]

I haven't had a chance to do a detailed check... was running through some momemts and tried 0... not good for division... and the quick kludge was to put a Check() stipulating no 0 value... also have to look into an easy means of inputting rebar... put the basic material in, but didn't incorporate it.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik