Column Buckling

[peach]

I am looking for the best method to determine Pcrit for a beam with a variable cross-section. Any suggestions would be appreciated.

 

[babe]

Try Roark's formula's for stress and strain. If I remember correctly, chapter 10 has formulas for buckling.

 

[Bridgeman]

The Australian Bridge Design Code gives the following formula for a reinforced concrete column:<br>
<br>
Nc = (pi^2/Le^2)*(200*d*.6*Mub)/(1+Beta_d) where<br>
<br>
Nc = Buckling load<br>
Pi = pi or 22/7<br>
Le = effective length of column<br>
d = depth to outermost layer of tensile steel<br>
Mub = moment corresponding to nuetral axis depth of 0.6*d<br>
Beta_d = ratio of dead load to total load.<br>
<br>
Hope this helps!<br>
Bridgeman<br>

 

[legner]

The Structural Stability Research Council (SSRC) "Guide to Stability Design Criteria for Metal Structures" would be a good reference. I think the latest (5th?) edition was edited by Galambos. I found it once in a local university library.

 

[shenoy]

Indian Standards Gives a method for the design of slender RCC Columns subjected to biaxial bending. I have a software called COLDES which is capable of designing such columns. email me roynshenoy@vsnl.com or visit

http://www.roynshenoy.com

and see the software section.<br>