Einfluß des Eigenspannungsbeiwertes k auf die Ermittlung der Mindestbewehrung bei Zwang nach DIN 1045‐1

Influence of the internal Tension Parameter k in DIN 1045‐1 for the Evaluation of the minimal Reinforcement under Constraint The definition of the parameter k given in DIN 1045‐1 does not lead to appropriate results for cross section thicknesses between 0, 30 m und 0, 80 m. The function for the necessary minimal reinforcement shows a kink point for thicknesses of h = 0, 80 m which is due to the linear interpolation of parameter k. This article presents two alternatives for replacing the internal tension parameter k by proper algebraic functions which leads to realistic curves. Diagrams show and explain the problem discussed.