Member Configurations

The Member Configuration dialog box manages the basic specifications for the stress-strain analysis of members and sets of members. The concept of the Configurations dialog box is described in Chapter Stress-Strain Analysis . It also explains how you can assign the objects.

Stress

In the Stresses tab, you can select the stresses to be calculated and specify the type of limit stress.

Dialog Box "Member Configuration": Specifying Stresses to Calculate

If you want to increase or reduce the limit stress for a stress type, you can scale it accordingly in the "Factor" column. If you select the "/" option, the stress is divided by the factor multiplied by "*".

If you want to use the user-defined stress as a reference instead of the limit stress saved in the material properties, select the limit stress type 'User' from the list. Thus, the field in the 'Limit Stress' column becomes accessible.

The "User-defined compression/tension" limit stress type allows you to specify sign-dependent limit stresses for certain stress components.

Specifying User-Defined Limit Stresses for Compression and Tension

Stress Ranges

In the Stress Ranges tab, you can select the stress types for which the ranges are to be calculated and whether limit stresses are relevant in this case.

Specifying Stress Ranges to Calculate

The limit stress type 'Without' is preset. This should allow for the analysis of stress ranges independent of standards. If you want to specify a limit stress, select the stress type 'User' in the list, then enter the corresponding value.

Special Options

In the Special Options tab, you can change other design-relevant parameters.

Dialog Box "Member Configuration": Specifying Special Options

Modify von Mises Equivalent Stress

Use the two factors to control the weighting of the normal and shear stresses in the equivalent stress according to von Mises.

Eccentric transverse loads on I-beams

If transverse loads are applied to the upper chord of beams, they have a decreasing effect on the bending stress in the lower chord as the cross-section height increases. For this reason, it is possible to consider eccentrically acting transverse loads by a simplified method for high I-sections: For each rolled or parametric symmetric I-section, the bending moment M_z is completely charged on the top flange. To determine the stresses, the add-on uses an equivalent cross-section with halved moment of inertia I_z.

The advantage of this option is that the shear loads can be modeled in relation to centroidal axes in order to avoid torsion.