2019 – Urbino, Italy – Cathedral of St. Maria Assunta

Following the seismic events that occurred in central Italy on 24-26 August 2016 and 30 October 2016 the Cathedral Basilica of S. Maria Assunta in Urbino reported significant damage to the main load-bearing structures. The main critical issues encountered after the quakes concern widespread cracking in the vault barrel of the central nave for hammering of the facade, in the triumphal arches, in the entablature of the drum, in the lantern, in the entablatures of the transepts. A restoration project has been defined and implemented (2018-2021), and the cathedral was eventually re-opened to public at the end of 2021.
In the framework of the seismic improvement and restoration works, Expin carried out investigation activities including Operational Modal Analysis, as well as the installation of a SHM system, provided with seismic accelerometers.