The paper summarizes the conceptual development of a vibration-based strategy suitable to the structural health monitoring of ancient masonry towers and exemplifies its application in the continuous dynamic monitoring of the tallest historic tower in Mantua, Italy. The presented approach is based on the installation of low-cost monitoring systems (consisting of few accelerometers and temperature sensors) and on the combined use of automated operational modal analysis, regression models to mitigate the environmental effects on identified natural frequencies and multivariate statistical tools to detect the occurrence of abnormal structural changes. The application of the adopted strategy to 15 months of continuously collected experimental data: (1) highlighted the effect of temperature on the automatically identified natural frequencies; (2) demonstrated the practical feasibility of damage detection methods based on natural frequency shifts; (3) provided a clear evidence of the possible key role of continuous dynamic monitoring in the preventive conservation of historic towers.

One-year dynamic monitoring of a historic tower: damage detection under changing environment

GENTILE, CARMELO;SAISI, ANTONELLA ELIDE
2016-01-01

Abstract

The paper summarizes the conceptual development of a vibration-based strategy suitable to the structural health monitoring of ancient masonry towers and exemplifies its application in the continuous dynamic monitoring of the tallest historic tower in Mantua, Italy. The presented approach is based on the installation of low-cost monitoring systems (consisting of few accelerometers and temperature sensors) and on the combined use of automated operational modal analysis, regression models to mitigate the environmental effects on identified natural frequencies and multivariate statistical tools to detect the occurrence of abnormal structural changes. The application of the adopted strategy to 15 months of continuously collected experimental data: (1) highlighted the effect of temperature on the automatically identified natural frequencies; (2) demonstrated the practical feasibility of damage detection methods based on natural frequency shifts; (3) provided a clear evidence of the possible key role of continuous dynamic monitoring in the preventive conservation of historic towers.
2016
ancient tower, masonry, diagnosis, structural health monitoring, Automated modal identification; Continuous dynamic monitoring; Earthquake; Environmental effects; Condensed Matter Physics; Mechanics of Materials; Mechanical Engineering
File in questo prodotto:
File Dimensione Formato  
MECC_10.1007_s11012-016-0482-3.pdf

Accesso riservato

Descrizione: MECC_10.1007_s11012-016-0482-3.pdf
: Publisher’s version
Dimensione 5.16 MB
Formato Adobe PDF
5.16 MB Adobe PDF   Visualizza/Apri
meccanica_references.pdf

accesso aperto

Descrizione: scheda Scopus 27.07.2017
: Altro materiale allegato
Dimensione 58.45 kB
Formato Adobe PDF
58.45 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1009890
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 155
  • ???jsp.display-item.citation.isi??? 121
social impact