Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

Masonry towers, located in seismic zones, are vulnerable and prone to damages up compromise their stability. The scatter of data on the mechanical properties masonry, geometry boundary conditions determine a lack building knowledge expected behaviour. Therefore assessment capacity represents critical task. This paper contributes issue analysis masonry focusing meaningful case study: St.Silvestro belfry L’Aquila, Italy. tower, severely damaged by 2009 earthquake sequence, underwent extensive restoration works, endeavoured mitigate its vulnerability. observed damage, performed no-destructive testing campaign accomplished rehabilitation measures described paper. authors appraised actual performances belfry, reinforced last works. At first, Operational Modal Analysis (OMA) is carried out enhance knowledge. In second step, refined finite element model calibrated results from OMA seize dynamic response. Ultimately, using updated model, estimate fragility curves terms peak ground acceleration truncated incremental analyses.