Environmental effects on natural frequencies of the San Pietro bell tower in Perugia, Italy, and their removal for structural performance assessment
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- 作者：Filippo Ubertinia ; filippo.ubertini@unipg.it" class="auth_mail" title="E-mail the corresponding author ; Gabriele Comanduccia ; Nicola Cavalaglia ; Anna Laura Pisellob ; c ; Annibale Luigi Materazzia ; Franco Cotanab
- 关键词：Structural health monitoring ; Environmental effects ; Cultural heritage preservation ; Historical constructions ; Weather conditions ; Continuous hygro-thermal monitoring ; Operational modal analysis
- 刊名：Mechanical Systems and Signal Processing
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：82
- 期：Complete
- 页码：307-322
- 全文大小：7971 K
文摘
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Hygro-thermal effects on natural frequencies of a masonry bell-tower are investigated.
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Temperature variations produce significant changes in natural frequencies.
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Three temperature-driven types of frequency variations are observed including freezing.
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Linear regressive models allow to accurately remove temperature effects for SHM.
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Five environmental sensors provide the most accurate estimation of natural frequencies.