Preliminary estimation of the mechanical response of FRCM-strengthened RC shallow beams

Fabric-Reinforced Cementitious Matrix (FRCM) composites, as shown in literature, represent a prom-ising solution in both retrofitting and strengthening reinforced concrete (RC) elements. In parallel with the bond characteristics and the FRCM mechanical properties, pre-existing damage conditions have a key role on the effectiveness of the strengthening/retrofitting systems, also influencing the crack distri-bution on the FRCM layer applied at the intrados of the beams. A series of RC shallow beams was damaged in bending at different limit conditions and then retrofitted with the application of a FRCM layer on the tensile side. In this paper, a simplified prediction of the mechanical response of the rein-forced beam and a preliminary estimation of the crack distance and opening at serviceability conditions were carried out.