Welded connection under loads in 3 directions

I am fairly new to connection design and I am designing an end plate connection subject to shear (in both directions) and axial loads - it is the connection between a column sitting on top of a beam flange. For the weld between the end plate and the supported member along the web of the column in this case, how do you define the strength of the weld under the resultant load from all three directions? I considered finding the strength of the weld under the load in two directions at a time (i.e. i.) both in plane shear loads, ii.) in plane shear load in one direction and out of plane axial load, iii.) in plane shear load in perpendicular direction and out of plane axial load), and then finding the SRSS of the three strengths to compare to the SRSS required resultant strength of the applied loads. Would this a be a sufficient way to check the strength of the weld or am I missing something?

Additionally, if the same connection was subject to moments, would it make sense to design similar to a fixed column base plate with bolts outside of the flanges?

Thanks.