Discussion on data recorded by the Italian structural seismic monitoring network on three masonry structures hit by the 2016-2017 Central Italy earthquake

This paper presents an overview of the research activities developed in the framework of the ReLUIS project founded by Department of Civil Protection (DPC) in 2017 and 2018 and focused to analyze some experimental accelerations made available by the Osservatorio Sismico delle Strutture (OSS), an Italian network of permanent seismic monitoring systems belonging to DPC. In particular, the recordings acquired by OSS on three selected masonry structures hit by the 2016/2017 Central Italy were acquired, analyzed and re-elaborated by a team of researchers from the Universities of Genoa, Chieti-Pescara, Padua, Pavia and Turin. Such structures exhibited various damage levels, from slight to near collapse, highlighting interesting issues on the identification techniques, potentiality of modelling strategies and evidences on amplification phenomena. The available data on geometry, materials and constructive details (carefully checked and summarized in brief forms by the ReLUIS research group) together with the obtained results can be useful for future researches on this issue.