3702x
000303
2017-12-01

Question

How are the signs of member moments defined?


Answer:

The bending moment My is positive if tensile stresses occur at the positive member face (in the direction of the z axis). Mz is positive if compressive stresses occur at the positive member face (in the direction of the y axis).

The sign definition for torsional moments, axial forces, and shear forces conforms to the usual conventions: the internal forces are positive if they act in the positive direction at the positive face.


Author

Mr. Vogl creates and maintains the technical documentation.