Calculate polar moment of inertia (J) for weld groups subjected to torsional loading per AISC elastic method
Input Parameters
Results
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Polar Moment J
in³
--
Max Radial Distance r
in
--
Total Weld Length
in
Note: Polar moment J is used in the elastic vector method for eccentrically loaded weld groups. J = Ix + Iy per superposition principle.
Reference
AISC Steel Construction Manual, Table 8-8
J = Ix + Iy (polar moment = sum of planar moments)
Rectangle: J = (b+d)^3/6 - b^2*d^2/(2(b+d))
Circle: J = pi*r^3
Used in elastic torsional analysis of weld groups