A vibration-based health monitoring program for a large and seismically vulnerable masonry dome

12th International Conference on Damage Assessment of Structures

Pecorelli, M.L.^1 ; Ceravolo, R.^1 ; De Lucia, G.^1 ; Epicoco, R.^1

Politecnico di Torino, Department of Structural, Building and Geotechnical Engineering, c. Duca degli Abruzzi, 24, Torino

10129, Italy^1

关键词: Architectural heritage;    Automatic identification;    Dynamic monitoring system;    Effects of temperature;    Low-excitation energy;    Non-invasive diagnostics;    Operation modal analysis;    Vibration-based monitoring;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012009/pdf
DOI  :  10.1088/1742-6596/842/1/012009

来源: IOP

【 摘 要 】

Vibration-based health monitoring of monumental structures must rely on efficient and, as far as possible, automatic modal analysis procedures. Relatively low excitation energy provided by traffic, wind and other sources is usually sufficient to detect structural changes, as those produced by earthquakes and extreme events. Above all, in-operation modal analysis is a non-invasive diagnostic technique that can support optimal strategies for the preservation of architectural heritage, especially if complemented by model-driven procedures. In this paper, the preliminary steps towards a fully automated vibration-based monitoring of the world's largest masonry oval dome (internal axes of 37.23 by 24.89 m) are presented. More specifically, the paper reports on signal treatment operations conducted to set up the permanent dynamic monitoring system of the dome and to realise a robust automatic identification procedure. Preliminary considerations on the effects of temperature on dynamic parameters are finally reported.