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Concrete (Material)

Last modified by Iwona Budny Bjergø on 2022/01/18 12:24


For concrete structures, the partial safety factors γc and γS can be calculated automatically from Eurocode 2 reductions. Click Safety factor calculator next to the safety factors (Default settings > Material > Application data), check the required reduction box and press OK.

Figure: Safety factor calculator

In Material settings dialog different creep coefficients can be specified for Serviceability Limit State (SLS) and Ultimate Limit State (ULS). It has some consequences in load case calculation and results:

  • All load cases are calculated twice (first with the SLS Creep coefficient, than with the ULS Creep coefficient.
  • The displayed displacements are the results of the SLS calculation.
  • The displayed internal forces, reactions are the results of the ULS calculation.

Figure: Setting of creep coefficients

For reinforced concrete structure the user has the possibility to reduce the element stiffness in order to model the cracking’s effect in eigenfrequency calculation.


Figure: Stiffness reduction for reinforce concrete elements

In Material settings dialog the stiffness for stability analysis can be decreased. Taking a reduction factor into account is needed in those calculations where it is specified by the standards (e.g. at the cracked section analysis).


Figure: Reduction for stability analysis

Young modulus

Analysis type Concrete

Load cases,

Load group,

1st order load combination




2nd order load combination,

Imperfection calculation

Stability analysis fstab * Ecm

Eigenfrequency calculation

Seismic analysis

 Fdin * Ecm

Table: Calculation of Young-moduli in different analysis types