Fracture toughness of RC beams on the shear, strengthening by FRCM system Zinoviy Blikharskyy, Pavlo Vegera, Rostyslav Vashkevych and Taras Shnal MATEC Web Conf., 183 (2018) 02009 Published online: 31 July 2018 DOI: 10.1051/matecconf/201818302009