IRT research on influence of long-term loads on defects in FRP strengthened RC beamsMarcin Górski, Rafał Krzywoń, Rafał Białozor, Ryszard Białecki, Wojciech Adamczyk and Ziemowit OstrowskiMATEC Web Conf., 262 (2019) 08002DOI: https://doi.org/10.1051/matecconf/201926208002