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Mutual validation between different modal analysis techniques for dynamic identification of the so-called Temple of Minerva Medica, Rome

TitleMutual validation between different modal analysis techniques for dynamic identification of the so-called Temple of Minerva Medica, Rome
Publication TypeAtti di Congresso
Year of Publication2018
AuthorsRoselli, Ivan, Fioriti Vincenzo, Mongelli M., Bellagamba I., and De Canio Gerardo
Conference NameInternational Conference Florence Heri-Tech: the Future of Heritage Science and technologies
Volume364
PublisherIOP Publishing
Conference LocationFirenze
ISBN17578981
KeywordsAmbient vibrations, Analysis techniques, Conservation strategies, Damage of structures, Dynamic identification, Measurement points, Modal analysis, reliability analysis, Reliability of results, Scaffolds, Seismic activity, Seismology
Abstract

The dynamic identification by ambient vibration data is widely used to supply information on the global health of structures through the investigation of changes in their modal parameters. It can be used even for verification of the state of damage of structures after hazardous threats, for example seismic activity. Therefore, it can play a crucial role to integrate and support conservation strategies for historic architectural assets. Sometimes, in historic constructions only a limited number of positions are accessible or usable to install sensors, and so modal analysis must be based on data from few measurement points. Moreover, they might not be the optimal positions for the studied structure, so the obtained results would need further verification. In such circumstances, the mutual validation between different modal analysis techniques can be useful to assess the reliability of results. In the present paper a case study of application to the so-called Temple of Minerva Medica, Rome, is described. Ambient vibration data were acquired in four rowing acquisition sessions carried out from July 2016 to July 2017, which is a timespan usable to assess the impact of the recent Central Italy seismic sequence. For problems related to the installation of the scaffolding only few points were available for instruments positioning. A variety of techniques were applied, including FRF, FDD, EFDD, SSI, HVSR and complex modal models. The variance of the modal parameters obtained by each different technique was utilized to provide indications on the reliability of the average values.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049372939&doi=10.1088%2f1757-899X%2f364%2f1%2f012004&partnerID=40&md5=5302358250aa683c8a5c19095bb9be7f
DOI10.1088/1757-899X/364/1/012004
Citation Key6443