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  • Answer

    In the case of unsymmetric cross-sections (angles, Z sections), the main axes are inclined. The angle α describes the position of the principal axes u and v in relation to the standard axis system: This is the angle between the member axis y and the "strong" cross-section axis u. It is defined as positive if clockwise.

    The resulting bending moments of an unsymmetrical cross-section are displayed in relation to the principal axes by default. Therefore, the descriptions Mu and Mv appear in the graphic and in the table. If you want to display the values of the moments related to the member axes y or z, the corresponding setting must be made in the Results navigator (see Figure 01). The internal forces My and Mz are then displayed in the graphic and in the table.

    The display of the principal axes can be activated in the Display navigator by selecting "Member Axis Systems x,u,v" (see Figure 02).

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First Steps

First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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