I have modeled a single-span beam with several members. Why are the signs of the shear force diagram partially incorrect?

Answer

It is very likely caused by missing uniform staff orientation, see Figure 1.

Figure 01 - Shear Force Diagram Without Uniform Member Orientation

As soon as the member orientation is uniform (right-click on the member → 'Reverse Member Orientation'), the signs of the shear force diagram also match, see Figure 2.

Figure 02 - Shear Force Diagram with Uniform Member Orientation

Keywords

Shear force Sign Shear force diagram Member orientation

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