FAQ 004875 EN

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I have a question about the results of the serviceability limit state design: How is the increment of the dead load by the factor 1.8 and the imposed load by 1.48 explained in the result combinations for the SLS design?

Answer

These increments result from the creep components in a quasi-permanent combination. You can find the overview of which combinations are to be analyzed in the serviceability limit state according to DIN EN 1995‑1‑1 here or in the links of the FAQ.

The creep components are then simply added to the characteristic deformation, for example with 0.8 × dead load. This results in the factor 1.8 (see also Section 2.2.3 in EN 1995‑1‑1).

In this specific case, the following coefficients must be applied for the quasi-permanent design situation:

Gk ⋅ (1 + 0.8) + Qk ⋅ (1 + 0.6 ⋅ 0.8) = Gk ⋅ 1.8 + Qk ⋅ 1.48

j1 Gk,j1+kdef+P+Qk,11+ψ2,1kdef+i1 Qk,iΨ0,i+Ψ2,ikdef

Keywords

Creep SLS Serviceability K_def Kdef

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  • Updated 5 April 2021

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