(Untensioned) Reinforcement Behavior
Untensioned reinforcement is modeled as a perfectly elastic/plastic material, as is shown in code figure 3.8. The elastic modulus is that specified by the user in the materials window.
For strength considerations, the program uses (ULS) γ s ( γ s = 1.15 for UK National Annex).
For other considerations (accidental LS or SLS), γ s is used (γ s = 1.0 for UK National Annex).