Structural Health Monitoring (SHM) is a helpful tool to check structural conditions and to schedule maintenance operations. Ordinary maintenance with visual inspections alone is not sufficient to avoid closures or collapses of the structures. The aim of the thesis work is to highlight the advantages using fiber optic sensors to monitor civil structures. In particular, bridges have always played a central role in the economic and social growth of a country. After the events of the last few years the control of infrastructures has risen to ensure safety and serviceability. In this thesis is presented the case study of Cannara Bridge.