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Section 2
2-27
Horizontal Stress - as produced by the local z-shear force
and torsional moment.
Vertical Stress - as produced by the axial y-shear force and
torsional moment.
Direct Stress - as produced by the axial force and bending
moments in the local y and z directions.
The Combined Stress is calculated by the square root of the
summation of the squares of the above three principal stresses.
Following are the equations:
Forces
MX = Torsional moment
MY = Bending in local y-axis
MZ = Bending in local z-axis
FX = Axial force
VY = Shear in local y-axis
VZ = Shear in local z-axis
Properties of Weld
AX = Area of the weld as the line member
SY = Section modulus around local y-axis
SZ = Section modulus around local z-axis
JW = Polar moment of inertia
CH = Distance of the extreme fiber for horizontal (local z)
forces
CV = Distance of the extreme fiber for vertical (local y) forces
Stress Equations:
Horizontal stress,
Fh
VZ
AX
CH MX
JW
=+
×