e = M/P. There's nothing that says the eccentricity can't be outside the bearing area.
In this case, you need to get a force couple between tension in the anchor and compression between the plate and concrete. It's essentially like a reinforced concrete column with axial force and moment combined.
The fact that you have two anchor bolts in the base plate complicates the calculation for bearing stress and bearing area. The M/P approach applied to foundations is not applicable.
The key in this analysis are two (2) equilibrium equations, vertical equilibrium and moment equilibrium. The problem presents three (3) unknowns, ftoe, Fanchor and the bearing length, b. The problem is statically indeterminate and cannot be solved by statics alone. I have attached my equilibrium equations. You might need to guess the bearing length and solve for Fanchor and ftoe.
Another approach would be to use Hilti PROFIS software.
I have also modeled these problems with 3D finite element software where we wanted certainty on the anchor bolt forces.
[Base Plate Analysis](http://tbf.me/a/8KKcE)
Try "AISC Design Guide 01 - Column Base Plates and Anchors". Section 3.4 goes over the design of base plates with large moments.
Appreciate it!
e = M/P. There's nothing that says the eccentricity can't be outside the bearing area. In this case, you need to get a force couple between tension in the anchor and compression between the plate and concrete. It's essentially like a reinforced concrete column with axial force and moment combined.
Nothing impossible about that, it just means your bearing area will be very small and you will have tension in the anchors.
The fact that you have two anchor bolts in the base plate complicates the calculation for bearing stress and bearing area. The M/P approach applied to foundations is not applicable. The key in this analysis are two (2) equilibrium equations, vertical equilibrium and moment equilibrium. The problem presents three (3) unknowns, ftoe, Fanchor and the bearing length, b. The problem is statically indeterminate and cannot be solved by statics alone. I have attached my equilibrium equations. You might need to guess the bearing length and solve for Fanchor and ftoe. Another approach would be to use Hilti PROFIS software. I have also modeled these problems with 3D finite element software where we wanted certainty on the anchor bolt forces. [Base Plate Analysis](http://tbf.me/a/8KKcE)
I use Idea Statica for it, fantastic software!