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In RSTAB / RFEM I have modified the cross-section values of a cross-section or modified the stiffness of a bar. After recalculation, the deformation of the system has adjusted to the new cross-section values. However, in my opinion, this modification was not considered in the add-on modules for design.

Answer

In the additional modules (eg steel, steel EC3, etc.) the modified cross-section values are not adopted. The modified values are used only for calculating the internal forces. The stresses are calculated over the real cross-sectional dimensions, which can not be modified. This is also difficult to implement because many elements the element width or element height is needed and is not known by the modification, which has been reduced exactly. This is of interest, for example, with the c / t proofs in the steel EC3 module.

Keywords

Modification Cross-section values stiffness reduction modify stiffness

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