Issue 59

M. Madqour et al, Frattura ed Integrità Strutturale, 59 (2022) 62-77; DOI: 10.3221/IGF-ESIS.59.05

ε fu Ultimate rupture strain in FRP reinforcement ε s Strain level in steel reinforcement ε sy Strain corresponding to the yield strength of steel reinforcement ε si Initial strain in steel reinforcement ε sl Additional strain in steel reinforcement after strengthening and loading  cu The maximum compressive strength  f FRP reinforcement ratio  s The ratio of non-prestressed reinforcement  f Additional FRP strength-reduction factor

77