PSI - Issue 44

Marialuigia Sangirardi et al. / Procedia Structural Integrity 44 (2023) 1602–1607 M. Sangirardi et al./ Structural Integrity Procedia 00 (2022) 000 – 000

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The good agreement with the results provided by an accelerometer placed on the tank demonstrated the reliability of the proposed technology for real field applications, in which stability and light conditions could not be controlled. Furthermore, the possibility of recording videos from several positions on the ground and to select measurement points and parameters in the post-processing phase allowed detecting information on the dynamic response of the elevated water tank, such as the relevance of its torsional behaviour, which were suggested by preliminary numerical simulations but resulted unavailable from accelerometric data. The proposed technology, which is cheap, totally non-invasive, and versatile, thus appears extremely promising for integrating information provided by routine approaches and, in the near future, for becoming a self-consistent strategy for structural health monitoring. To this aim, more research is still needed to develop a deeper understanding of the effect of light conditions and undesired movements of the camera, as well as of selection of monitored areas and initial calibration of the magnification process. Acknowledgements This work was carried out within the Research Projects “STAND STima e ANalisi del Danneggiamento di edifici storici indotto da opere in sotterraneo ” and “RIPARA Integrated systems for the seismic retrofitting of architectural heritage” fun ded by Regione Lazio. MS, SDS, PM and GdF acknowledge funding also from the Italian Ministry of Education, University and Research (MIUR), in the frame of the Departments of Excellence Initiative 2018-2022, attributed to the Department of Engineering of Roma Tre University. References Bhowmick, S., Nagarajaiah, S., Lai, Z., 2020. Measurement of full-field displacement time history of a vibrating continuous edge from video. 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