In this context, the use of a residual strength that leads to a critical or supercritical ductility does not seem compatible with thestress produced due to the transient loads. If segments are designed not to crack, this criterion is excessively severe and could
provide a structural response above the required for safety reasons,
resulting in an overestimation of the minimum residual strength
needed. To avoid overestimations, an alternative definition of the
minimum ductility is proposed in the present study for the segmented lining.