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004364
2020-03-04

Question

Can I also use the horizontal branch of the stress-strain curve for cross-section design in RF‑CONCRETE Members?

Answer:

In cross-section designs, RF‑CONCRETE Members or CONCRETE calculates with the stress-strain diagram for reinforcing steel according to DIN EN 1992‑1‑1, 3.2.7(2)a; that is, with an increasing upper branch up to ftk and a strain limitation of εud = 0.025.

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FAQ 004364 | Can I also use the horizontal branch of the stress-strain curve for cross-section design ...
Tensile Strength f_tk with Increasing Branch of Stress-Strain Relation
Tensile Strength f_tk with Increasing Branch of Stress-Strain Relation

In RF‑CONCRETE Members or CONCRETE, there is no option to switch to a design with a horizontal branch according to 3.2.7(2)b.

However, if necessary, you can calculate with a user-defined material, in which ftk = fyk.

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