Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2016-374
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
18 Jan 2017
Review status
A revision of this discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Structural and Seismic Monitoring of a Monumental Building: the Case Study of the Royal Castle of Racconigi
Gianni Niccolini1, Amedeo Manuello1, Elena Marchis2, and Alberto Carpinteri1 1Politecnico di Torino, Department of Structural, Geotechnical and Building Engineering, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
2Politecnico di Torino, Department of Architecture and Design, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Abstract. The stability of an arch as a structural element in the thermal bath of King Carlo Alberto in the Royal Castle of Racconigi (on the UNESCO World Heritage List since 1997) was assessed by the Acoustic Emission (AE) monitoring technique with application of classical inversion methods to recorded AE data. First, damage source location by means of triangulation techniques and signal frequency analysis were carried out. Then, the recently introduced method of natural time analysis was preliminarily applied to the AE time series in order to reveal possible entrance point to a critical state of the monitored structural element. Finally, possible influence of the local seismic and micro-seismic activity on the stability of the monitored structure was investigated. The criterion to select relevant earthquakes was based on the estimation of the size of earthquake preparation zones. The presented results suggest the use of AE technique as a tool for detecting both ongoing structural damage processes and micro-seismic activity during preparation stages of seismic events.

Citation: Niccolini, G., Manuello, A., Marchis, E., and Carpinteri, A.: Structural and Seismic Monitoring of a Monumental Building: the Case Study of the Royal Castle of Racconigi, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016-374, in review, 2017.
Gianni Niccolini et al.
Gianni Niccolini et al.
Gianni Niccolini et al.

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Short summary
An architectural element of the Royal Castle of Racconigi (Northwestern Italy, 17th century) is subjected to non-destructive testing for structural integrity evaluation. It is found that the so-called acoustic emissions – high-frequency vibrations emitted as tiny cracks develop inside stone and concrete – correlate with those of small, nearby earthquakes, suggesting new approaches of monitoring gradual damage accumulation inflicted by such earthquakes on architectural heritage and monuments.
An architectural element of the Royal Castle of Racconigi (Northwestern Italy, 17th century) is...
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