ABSTRACT
The paper presents selected results obtained in the continuous monitoring of the Candia bridge – a historical masonry arch bridge crossing the Sesia River in the north of Italy – to detect scour-induced effects. Generally speaking, hydraulic processes are the main cause of bridge failure, and masonry arch bridges are particularly vulnerable to scour-induced settlements. Consequently, the early detection of anomalies associated to scour is of outmost importance to ensure the safe operation of river bridges. In the present study, measurements of the piers rotation are performed using tiltmeters; in addition, environmental parameters, such as temperature, water level and riverbed changes, are measured to check possible correlation with the monitored rotations. The results from the first two years of monitoring highlight anomalous changes in the rotation-temperature correlation of various piers.
