Calculating for eccentric loads on pad (mat) foundations 1

[Wopshistos]

When loads onto pads give a resultant with an eccentricity outside the kern i am only able to locate formulae that assume single axis bending to determine the base pressure distribution.
There are published charts (Teng etc) that list factors for other cases however i would like to know the basis of the formulae if they exist at all.

Perhaps a member can point me in the right direction or, better still, advise what the formulas are.

 

[Deckard451]

I am looking for exactly the same thing!
Have you had any luck?
Please let me know if you have

 

[steve1]

"Foundation Engineering" 2nd Edition
Peck, Hanson, & Thornburn
John Wiley & Sons
ISBN 0-471-67585-7
Chapter 24
Paragraph 24.4
Figure 24.4 "Footing subjected to moments about both axes with zero pressure under part of base"

This paragraph provides an eight step trial & error procedure for solving this type of problem.

 

[Wopshistos]

chaps,
this might not be so useful but i did work out a reasonably simple formulae to use which derives Teng's 'k' value for single or double eccentricity. Trouble is I have lost it - for now at least.
Will attempt to post it when i recover the file it is in if anyone is interested.

 

[austim]

see thread507-4647