Is it possible to adjust the initial values of the temperature courses entered for the fire resistance design? For example, I would like to adjust the initial value of the moisture content.

Answer

The fire resistance design is based on the temperature course from Annex A EN 1992‑1‑2.

The initial values for temperature courses cannot be adjusted in the add-on modules (RF‑/CONCRETE Members and RF‑/CONCRETE Columns). The temperature curves according to Annex A EN 1992‑1‑2 are based on the following assumptions:

  • The specific heat of concrete corresponds to the specifications according to EN 1992‑1‑2, 3.2.2.
  • The moisture is 1.5%. For moistures greater than 1.5%, the specified temperatures are on the safe side.
  • The thermal conductivity of concrete is the lower limit value mentioned in EN 1992‑1‑2, 3.3.3.
  • The emissivity value of the concrete surface is 0.7.
  • The convective heat-transmission coefficient is 25 W/m²K.

Keywords

Fire resistance Fire resistance design Temperature course

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