Acoustic emission monitoring of medieval towers considered as sensitive earthquake receptors

Carpinteri, Alberto; Lacidogna, Giuseppe; Niccolini, Gianni

doi:10.5194/nhess-7-251-2007

Cited by 43 publications

(45 citation statements)

References 16 publications

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“…In this framework, over the recent years there has been an increasing interest in AE monitoring related to environmental phenomena. Several case histories in the Italian territory and previous studies support the hypothesis that increased AE activity may be a signature of crustal stresses redistribution in a large zone during the preparation of a seismic event (Gregori and Paparo, 2004;Gregori et al, 2005;Carpinteri et al, 2007;Niccolini et al, 2011). According to previous research studies performed by Dobrovolsky et al (1979), it can be assumed that the preparation zone is a circle with its center at the epicenter of the impending earthquake.…”

Section: Introductionmentioning

confidence: 77%

“…Finally, AE structural monitoring potentially provides twofold information in seismic areas: one concerning the structural damage and the other concerning the microseismic activity, propagating across the ground-building foundation interface, for which the building foundation represents a sort of extended underground probe (Gregori and Paparo, 2004;Gregori et al, 2005;Carpinteri et al, 2007). In this sense, structural monitoring in seismic areas could be usefully coupled with investigations of the local earthquake precursors (Niccolini et al, 2015;Lacidogna et al, 2015b).…”

Section: Conclusion and Prospectivesmentioning

confidence: 99%

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Signal frequency distribution and natural-time analyses from acoustic emission monitoring of an arched structure in the Castle of Racconigi

Niccolini

Manuello

Marchis

et al. 2017

Nat. Hazards Earth Syst. Sci.

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Abstract. The stability of an arch as a structural element in the thermal bath of King Charles Albert (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 a possible entrance point to a critical state of the monitored structural element. Finally, possible influence of the local seismic and microseismic activity on the stability of the monitored structure was investigated. The criterion for selecting relevant earthquakes was based on the estimation of the size of earthquake preparation zones. The presented results suggest the use of the AE technique as a tool for detecting both ongoing structural damage processes and microseismic activity during preparation stages of seismic events.

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Section: Introductionmentioning

confidence: 77%

Section: Conclusion and Prospectivesmentioning

confidence: 99%

Signal frequency distribution and natural-time analyses from acoustic emission monitoring of an arched structure in the Castle of Racconigi

Niccolini

Manuello

Marchis

et al. 2017

Nat. Hazards Earth Syst. Sci.

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“…The tower, in fact, as in another case investigated by the authors regarding the Medieval Towers of Alba in Italy, is very sensitive to earthquake motions [9,10]. …”

Section: Asinelli Towermentioning

confidence: 98%

“…With this spirit we introduce a statistical approach to analyze spatial and temporal correlations between AE bursts from the structures and surrounding earthquakes, along the lines of similar investigations of the spatial and temporal correlations of earthquakes [2,3,9].…”

Section: Grassberger-procaccia Algorithmmentioning

confidence: 99%

Correlation between Earthquakes and AE Monitoring of Historical Buildings in Seismic Areas

et al. 2015

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Abstract:In this contribution a new method for evaluating seismic risk in regional areas based on the acoustic emission (AE) technique is proposed. Most earthquakes have precursors, i.e., phenomena of changes in the Earth's physical-chemical properties that take place prior to an earthquake. Acoustic emissions in materials and earthquakes in the Earth's crust, despite the fact that they take place on very different scales, are very similar phenomena; both are caused by a release of elastic energy from a source located in a medium. For the AE monitoring, two important constructions of Italian cultural heritage are considered: the chapel of the "Sacred Mountain of Varallo" and the "Asinelli Tower" of Bologna. They were monitored during earthquake sequences in their relative areas. By using the Grassberger-Procaccia algorithm, a statistical method of analysis was developed that detects AEs as earthquake precursors or aftershocks. Under certain conditions it was observed that AEs precede earthquakes. These considerations reinforce the idea that the AE monitoring can be considered an effective tool for earthquake risk evaluation. OPEN ACCESSAppl. Sci. 2015Sci. , 5 1684

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“…Similar and/or analogous investigations are to be carried out in the laboratory, concerning all materials used in buildings or in machineries, in order to inspect the potential applications for security and/or for the recovery of ageing structures (e.g. Carpinteri et al, 2007). At present, it appears premature giving an account of such achievements.…”

Section: H ="Hammer" Effectmentioning

confidence: 99%

Ultrasound monitoring of applied forcing, material ageing, and catastrophic yield of crustal structures

Gregori

Lupieri²,

Paparo³

et al. 2007

Nat. Hazards Earth Syst. Sci.

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Abstract.A new kind of data analysis is discussed -and a few case histories of actual application are presentedconcerning the physical information attainable by acoustic emission (AE) records in geodynamically active or volcanic areas. The previous analyses of such same kind of observations were reported in several papers appeared in the last few years, and here briefly recalled. They are concerned with the inference of the forcing ("F ") acting on the physical system, and on the ageing ("T ") or fatigue of its "solid" structures. The new analysis here discussed deals with the distinction between a state of applied stress ("hammer regime"), compared to state of "recovery regime" of the system while it seeks a new equilibrium state after having been perturbed. For instance, in the case of a seismic event -and according to some kind of almost intuitive argument -the "hammer regime" is the phenomenon leading to the main shock, while the "recovery regime" deals with the well known aftershocks. Such same intuitive inference, however, can be investigated by a much more formal algorithm, aimed at envisaging the minor changes of the behaviour of the system, during its history and during its present dynamic evolution. As a demonstrative application, detailed consideration is given of AE records -each one lasting for a few years -collected on the Italian peninsula vs. records collected on the Kefallinìa Island (western Greece). Such two areas are well known being characterised by some great comparative difference in their respective tectonic setting. When considering planetary scale phenomena, they appear comparatively very close to each other. Hence, they are likely being presumably affected by similar large-scale external actions, although they ought to be expected to respond in some completely different way. Such facts are clearly manifested by some substantially different AE responses of the local crustal structures. However, a full understanding of such entire set of geodynamic Correspondence to: M. Poscolieri (maurizio.poscolieri@idac.rm.cnr.it) and tectonic details ought to require several year data series of AE records, and/or (maybe) also simultaneous AE records collected within some suitable array of AE stations. Such understanding ought to permit the inference of the spatial features of the crustal stress propagation -including its diagnosis and "forecasting" -in addition to the temporal diagnosis and "prevision" that can be attained by isolated point-like AE recording stations. Additional analyses are in progress.

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Acoustic emission monitoring of medieval towers considered as sensitive earthquake receptors

Cited by 43 publications

References 16 publications

Signal frequency distribution and natural-time analyses from acoustic emission monitoring of an arched structure in the Castle of Racconigi

Signal frequency distribution and natural-time analyses from acoustic emission monitoring of an arched structure in the Castle of Racconigi

Correlation between Earthquakes and AE Monitoring of Historical Buildings in Seismic Areas

Ultrasound monitoring of applied forcing, material ageing, and catastrophic yield of crustal structures

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