I obtain lifting support forces, even though the loads act in the opposite directions. Why?

Answer

First, you should check the direction in which the self-weight of the structural elements acts. You can also display the self-weight graphically by using "Display Navigator" (see Figure 01). It often happens that a user does not convert the data when switching the global Z‑axis in the calculation parameters, and then only adjusts the geometry. The self-weight acts in a wrong direction and it is necessary to assign a correct sign to the load case (see Figure 02).

Keywords

Lifting force Negative support force Self-weight

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