Foundation design for Biaxial Momoent
Foundation design for Biaxial Momoent
(OP)
I am looking for an excel sheet for the design of spread footing subjected to biaxial moment.
So if you can passon the information or a link for the same.
I also wish to calculate %area of the foundation which is out of contact with the soil.
So if you can passon the information or a link for the same.
I also wish to calculate %area of the foundation which is out of contact with the soil.






RE: Foundation design for Biaxial Momoent
Regards,
![[pipe] pipe](https://www.tipmaster.com/images/pipe.gif)
Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Foundation design for Biaxial Momoent
But it doesn't give you the equation for biaxial bending. For uniaxial moment one can easily calculate the redistributed pressure and area of footing which is out of contacat with the soil.
I need equations for foundation subjected to BIAXIAL MOMENTS. Pressure diagram would be 3-dim and calculating volume and CG to satisfy the principal equation is really difficult.
RE: Foundation design for Biaxial Momoent
RE: Foundation design for Biaxial Momoent
I made a spreadsheet to do this recently. It's pretty complicated and requires iterations. You could have a triangle, trapezoid or rectangle with a triangle missing in bearing. You have to figure out which one it is by iteration and solve accordingly. The resulting area is unsymmetrical so you have to use the general formula for stresses due to biaxial bending. If you are just doing a few cases, there are charts available that work very well. I agree with Qshake that you should through the exercise of making the spreadsheet yourself. It will be fun!
RE: Foundation design for Biaxial Momoent
Additional information can be found using AASHTO which has a graphical interpretation to go along with the equations.
Regards,
![[pipe] pipe](https://www.tipmaster.com/images/pipe.gif)
Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.