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Re: Column Design
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- Subject: Re: Column Design
- From: Santhosh Kumar Yedidi <sant527(--nospam--at)gmail.com>
- Date: Thu, 29 Dec 2005 16:57:06 +0530
) Yes it means one set of forces at each end. There are two ends of the column for which we get a total of two sets of forces. ) We can get the bending/SF/axial diagrams for each column from the forces at their ends. For example, a column of height 10 m is there. We get the bending moment diagram in both the directions (say X and Y). Let the maximum bending moment in X-dir occur at 2 m from the bottom and max. BM in Y-dir occur at 5 m from bottom. We get the axial force daigram, Let the maximum axial force be at the bottom of the column. But all these are not at the same location from the bottom, so which section of the column is critical for design. And another thing, let us suppose we have 500 columns in a structure. Then we cant do bending/shear/axial diagrams to find max bending/shear/axial for each column. The general procedure I saw is one takes maximum of the column reactions for design. But I feel one should also consider the direction of the moments at both the ends. If they are in same dir how to take their effect, and if they are in opposite direction how to consider. Santhosh On 12/29/05, Polhemus, Bill <BPolhemus(--nospam--at)wje.com> wrote: > It isn't clear to me what you mean be "not possible to get the bending/SF/axial diagrams." If you know the forces at each end of the column, and you know the lateral loading on the column if any, of COURSE you can get the diagram. Unless this is a response spectrum analysis? > > When you say "two sets of forces at each end," do you mean "one set in each of two orthogonal directions" or should this read "ONE set of forces at each (of two) ends"? > > More information is required. > > ________________________________ > > From: Santhosh Kumar Yedidi [mailto:sant527(--nospam--at)gmail.com] > > After frame analysis we get two sets of forces at each end of a > vertical member (column). But while doing design we generally require > only one set of forces. So can any one help which set of forces have > to be considered. > > ******* ****** ******* ******** ******* ******* ******* *** * Read list FAQ at: http://www.seaint.org/list_FAQ.asp * * This email was sent to you via Structural Engineers * Association of Southern California (SEAOSC) server. To * subscribe (no fee) or UnSubscribe, please go to: * * http://www.seaint.org/sealist1.asp * * Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you * send to the list is public domain and may be re-posted * without your permission. Make sure you visit our web * site at: http://www.seaint.org ******* ****** ****** ****** ******* ****** ****** ********
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