Delamination mechanism of GFRP sheet bonded on the reinforced concrete beams Rudy Djamaluddin, Hijriah, Rita Irmawati, Faharuddin and Rossy T. Wahyuningsih MATEC Web Conf., 258 (2019) 03009 Published online: 25 January 2019 DOI: 10.1051/matecconf/201925803009