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Local Bending in Tubes/Pipes

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How would you check the local bending in a tube (or pipe) column when the 
connection is a shear plate.  There is the eccentricity of the bolt holes 
to the column which puts a small local moment into the column.  Our 
method is to get the resulting moment couple (using moment / length of 
shear plate) and check the surface as a flat plat for tubes or as an arch 
for pipes (using Roark's) and taking the area resisting the force to be 
about 4 in. for the calculation of Sx.  Then using an allowable stress of 
0.75Fy.  Any other suggestions?

Mike