Abstract
Remote detection of structural aging, degradation phenomena and damage due to hazardous events is critical to ensure safety and reliability of civil or industrial structures. This is the motivation of the rapid development and increasing application of fully automated structural health monitoring (SHM) systems in civil engineering. Modal-based damage detection currently represents a popular approach for SHM of civil structures. In fact, it is a global method for damage detection and, as such, the measurement locations are not required to be close to the damage. However, damage sensitive features defined in terms of modal parameter estimates are also influenced by environmental and operational factors. Thus, neglecting this influence might jeopardize the reliability of the technology. In this framework, the present paper investigates the potential of modal-based SHM to detect earthquake damage at anchors of an atmospheric liquid storage tank. To this aim, the influences of bolt loosening at supports and of liquid level on modal parameters are investigated. The ultimate goal of the present study is the definition of criteria for the effective design and application of modal-based SHM to liquid storage tanks.
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Acknowledgements
The present work has been partially carried out in the framework of a broader research project issued by ASREM—Molise Region Health Authority, on safety and structural health monitoring of the regional health facilities. The financial supports to the research activities from ASREM, the DIBT-IMPACT (Integrated Monitoring of Pressurized and AtmospheriC Tanks) research program at the University of Molise, and the ReLuis-DPC Executive Project 2019–2021—WP6 are gratefully acknowledged. Edwin Reynders gratefully acknowledges the financial support of the Research Foundation Flanders (FWO), Belgium, through the research project G099014N.
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Rainieri, C., Gargaro, D., Reynders, E. et al. A study on the concurrent influence of liquid content and damage on the dynamic properties of a tank for the development of a modal-based SHM system. J Civil Struct Health Monit 10, 57–68 (2020). https://doi.org/10.1007/s13349-019-00369-0
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DOI: https://doi.org/10.1007/s13349-019-00369-0