A study on the structural stability of the Asinelli Tower in Bologna

Carpinteri, Alberto; Lacidogna, Giuseppe; Manuello, A.; Niccolini, Gianni

doi:10.1002/stc.1804

Cited by 33 publications

(46 citation statements)

References 15 publications

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“…In Bologna, Emilia-Romagna, there is another important masterpiece of Italian architectural and historical heritage, the "Asinelli Tower", which is also the symbol of the city. To study the damage evolution of the structure, we have recently analyzed the effect of repetitive and impulsive natural and anthropic events, such as earthquakes wind, or vehicle traffic, with the AE technique [3].…”

Section: Description Of Chapel XVII and Asinelli Towermentioning

confidence: 99%

“…The output voltage signals of the piezoelectric transducers (PZT) were filtered with a pass-band from 50 kHz to 800 kHz and a detection threshold of 100 μV. The obtained data from this device are the cumulative counting of each mechanical wave, the acquisition time, the measured amplitude in volts, the duration, and the number of oscillations across the threshold value for each AE signal [2,3]. Then, at the post-processing stage, we discarded signals with a duration shorter than 3 μs and containing less than three oscillations across the detection threshold in order to filter out electrical noise spikes.…”

Section: Acoustic Emission Monitoringmentioning

confidence: 99%

“…AE monitoring began on 23 September 2010 and ended on 10 January 2011, for a total duration of about 16 weeks. By monitoring a significant part of this tower, the incidence of vehicle traffic, seismic activity and wind action on the damage evolution within the structure were assessed [3].…”

Section: Asinelli Towermentioning

confidence: 99%

“…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%

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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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Section: Description Of Chapel XVII and Asinelli Towermentioning

confidence: 99%

Section: Acoustic Emission Monitoringmentioning

confidence: 99%

Section: Asinelli Towermentioning

confidence: 99%

Section: Grassberger-procaccia Algorithmmentioning

confidence: 99%

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

et al. 2015

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“…Various SHM techniques have been developed and are used in practice for structural damage detection, as discussed, for example, in the previous literature . Recent years have shown, an increasing interest in novel, the so‐called non‐classical nonlinear damage detection methods .…”

Section: Introductionmentioning

confidence: 99%

Damage imaging in composites using nonlinear vibro-acoustic wave modulations

Pieczonka

Zietek

Klepka

et al. 2017

Struct Control Health Monit

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The paper deals with the application of nonlinear vibro‐acoustic modulation technique for detection and localization of impact damage in a laminated composite plate. An imaging procedure—based on the nonlinear vibro‐acoustic modulation sidebands—is proposed. The procedure relies on simultaneous low‐frequency modal and high‐frequency ultrasonic excitations. Laser scanning vibrometry is used to analyze the amplitude of modulation sidebands in vibro‐acoustic responses. This analysis is performed for different positions on monitored structure to reveal the location and shape of damage. The method is illustrated using a simple example of impact damage detection in a composite plate. The experimental damage detection results are compared with the results obtained from the previously used approach on the basis of higher harmonic generation. The proposed method demonstrates better ability to locate damage in these comparative tests without the need to increase the measurement bandwidth to the higher harmonics regime. The work shows that the local defect resonance analysis can improve damage detection results of both compared approaches.

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Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

Sagar

Kumar

Prasad

et al. 2018

Struct Control Health Monit

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Summary Reinforced concrete (RC) flanged beam specimens were tested under incremental cyclic load till failure in flexure, and simultaneously, the acoustic emission (AE) signals released by the specimens were recorded. To assess damage in RC structures, a previously published index of damage (ID) based on AE signals was used. This index, however, needs to know the yielding point of the specimen. In the present study, yielding point was identified with a probabilistic method known as Gaussian mixture modeling (GMM) applied to the AE signals, as compared with that obtained by means of the plastic strain energy. It was observed that yielding load obtained with both methodologies was almost same, thus validating the GMM method. This result permits to use the ID index for damage monitoring of RC structure in practical scenarios, by using only information hidden in the AE signals. The influence of loading rate, failure type (tensile and shear), RC beam depth, concrete compressive strength, and percentage of tensile steel reinforcement on ID were studied in this work.

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A study on the structural stability of the Asinelli Tower in Bologna

Cited by 33 publications

References 15 publications

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

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

Damage imaging in composites using nonlinear vibro-acoustic wave modulations

Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

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