Wood - Combined Biaxial Bending

[puszka]

Hi y'all,

I'm working with the Canadian Wood Code O86 and I can't for the life of me find any mention of biaxial bending.

Am I able to analyze the combined effect similarly to how I would in steel i.e. Mfx/Mrx + Mfy/Mry < 1.0? I forget what this kind of equation is called but it's very common, including for combined axial and bending resistance for sawn wood members.

I know steel is isotropic and wood anisotropic so I was looking for some insight before I fired away with making an equivalence.

 

[SteelPE]

I am not familiar with Canadian code.... but the equation you posted above I commonly refer to as the interaction equation.

 

[jayrod12]

It's a unity equation, and yes you've got it correct.
Do you have the wood design manual? If so, in the front white pages there's an entire section of chapter 2 dedicated to it. It is odd that they don't necessarily reference the actual O86.

 

[puszka]

@jayrod12

Thanks! I found it and it is just as simple as I'd hoped.