DAMAGE ASSESSMENT AND SEISMIC VULNERABILITY ANALYSIS OF S. AGOSTINO CHURCH IN AMATRICE

In August 24th 2016, a severe earthquake of magnitude 6.0 struck Amatrice and a large area of Central Italy, causing many deaths and destruction. Subsequently three other big seismic shakes (magnitude 5.9 - 6.5 – 5.5) lead to the almost complete destruction of Amatrice historical centre. Specifically the medieval S. Agostino church was very severely damaged. Currently only part of the façade and a lateral masonry wall remain standing. The Church itself suffered consistent damage in the past during the 1979 Valnerina earthquake (magnitude 5.8). Since the aftermaths of August 24th earthquake, the late medieval religious complex of S. Agostino has been carefully monitored and surveyed. We used a multi-perspective oblique imagery strategy with the aim to achieve 3D aerial and terrestrial models, in a multi-temporal perspective concerning three different time situation during earthquake swarm. The new Geomatics technique solutions can be useful for damage documentation during emergency events that implicate urban areas and specific historical heritage buildings. In this study, the available information from the geometric survey, the previous strengthening interventions and site response analyses are used for a back analysis through finite elements modelling of the S. Agostino church. The analysis highlights the peculiarities of the dynamic response and the specific structural vulnerabilities that favoured the collapse. This analysis will be very useful to design the church reconstruction.