Monitoring Reinforced Concrete Structures Using Iron Thin Film Coated Optical Fibre Sensors Pedro M. Da Silva, João P.M. Carvalho, João P. Mendes, José M.M.M. De Almeida and Luís C.C. Coelho EPJ Web Conf., 305 (2024) 00024 Published online: 15 October 2024 DOI: 10.1051/epjconf/202430500024