How can be, according to DIN EN 1992-1-1/NA: Chapter NCI 2.3.1.2 (3) or DIN EN 1990/NA Chapter NDP A.1.3.1 (4), considered the partial safety factor γQ,T in the automatic load combinatorics with 1.0? The value γQ,T = 1.5 is used by default.

Answer

To implement this in the program, you have to copy the "Temperature" load case (see Figure 01). All loads contained in the load case will be copied as well. One of the load cases is used for the Load Combinations for Ultimate Limit State  (ULS), the other one for the serviceability limit state (SLS). The load in the load case for ULS is now multiplied by 1.0/1.5 = 0.667 (see Figure 02).

In order that the two load cases do not occur simultaneously, but only for the specific design situation, exceptions are determined in the respective combination rules. For ULS, it is quite simple to define the self-weight load case such that it is not combined with the Temperature User-Defined Case for SLS (see Figure 03). For SLS exactly the other way round, so load case dead weight not with temperature for ULS (see picture 04). The "Differently for each combination expression" check must be activated.

The desired load combinatorics is obtained subsequently (see Figure 05).

Keywords

Determining linear-elastic internal forces Temperature Restraint Unbroken

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