Additive combination expression of the modified Quast approach: the target stress curve is only applied if it exceeds the stress of the base material model.
|
σ̂(ε) |
Target stress curve, according to Quast or modified Quast; see the respective section |
|
σc |
Concrete stress in the tension zone |
|
σc,Basis(ε) |
Concrete stress in the base material model, for example, a damage model |
|
Δσc |
Additive tension stiffening factor applied to the concrete stress |