Seismic interferometry for earthquake-induced damage identification in historic masonry towers

García‐Macías, Enrique; Ubertini, Filippo

doi:10.1016/j.ymssp.2019.06.037

Cited by 20 publications

(10 citation statements)

References 63 publications

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“…In this regard, it is important to pinpoint that modal features (resonant frequencies, damping ratios and mode shapes) can be also extracted from the IRFs as a particular case (see e.g. [23,27]). Therefore, in light of the presented numerical results, it is suggested that ANDI may offer a quite complementary approach to provide OMA with enhanced local damage identification capabilities.…”

Section: Damage Identification Of Piers Through Andimentioning

confidence: 99%

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Structural assessment of bridges through ambient noise deconvolution interferometry: application to the lateral dynamic behaviour of a RC multi-span viaduct

García‐Macías

Ubertini

2021

Archiv.Civ.Mech.Eng

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Operational Modal Analysis (OMA) is becoming a mature and widespread technique for Structural Health Monitoring (SHM) of engineering structures. Nonetheless, while proved effective for global damage assessment, OMA-based techniques can hardly detect local damage with little effect upon the modal signatures of the system. In this context, recent research studies advocate for the use of wave propagation methods as complementary to OMA to achieve local damage identification capabilities. Specifically, promising results have been reported when applied to building-like structures, although the application of Seismic Interferometry to other structural typologies remains unexplored. In this light, this work proposes for the first time in the literature the use of ambient noise deconvolution interferometry (ANDI) to the structural assessment of long bridge structures. The proposed approach is exemplified with an application case study of a multi-span reinforced-concrete (RC) viaduct: the Chiaravalle viaduct in Marche Region, Italy. To this aim, ambient vibration tests were performed on February 4$$^{\text {th}}$$ th and 7$$^{\text {th}}$$ th 2020 to evaluate the lateral and longitudinal dynamic behaviour of the viaduct. The recorded ambient accelerations are exploited to identify the modal features and wave propagation properties of the viaduct by OMA and ANDI, respectively. Additionally, a numerical model of the bridge is constructed to interpret the experimentally identified waveforms, and used to illustrate the potentials of ANDI for the identification of local damage in the piers of the bridge. The presented results evidence that ANDI may offer features that are quite sensitive to damage in the bridge substructure, which are often hardly identifiable by OMA.

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Section: Damage Identification Of Piers Through Andimentioning

confidence: 99%

“…Those authors demonstrated the contribution of the latter to the dispersion of the wave velocities in high-rise buildings. Recently, the authors [23] extended the TB formulation to investigate the application of acceleration-and strain-based wave propagation analysis for damage identification of masonry towers under seismic actions.…”

Section: Introductionmentioning

confidence: 99%

Structural assessment of bridges through ambient noise deconvolution interferometry: application to the lateral dynamic behaviour of a RC multi-span viaduct

García‐Macías

Ubertini

2021

Archiv.Civ.Mech.Eng

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“…e objective of our damage detection method is to calculate the unknown matrix [X] of equation (6), which can be achieved using the pseudoinverse method [37] applied to equation (7):…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

“…In September 2017, earthquakes caused critical damage to buildings in Mexico City and in other smaller communities [4]. Knowing the location and extent of structural damage in a building can prevent its catastrophic collapse [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Damaged Flexibility Matrix Method for Damage Detection of Frame Buildings

Oyola¹,

Fonseca²,

Rocha³

2020

Advances in Civil Engineering

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is study presents the damaged flexibility matrix method (DFM) to identify and determine the magnitude of damage in structural elements of plane frame buildings. Damage is expressed as the increment in flexibility along the damaged structural element. is method uses a new approach to assemble the flexibility matrix of the structure through an iterative process, and it adjusts the eigenvalues of the damaged flexibility matrices of each system element. e DFM was calibrated using numerical models of plane frames of buildings studied by other authors. e advantage of the DFM, with respect to other flexibility-based methods, is that DFM minimizes the adverse effect of modal truncation. e DFM demonstrated excellent accuracy with complete modal information, even when it was applied to a more realistic scenario, considering frequencies and modal shapes measured from the recorded accelerations of buildings stories. e DFM also presents a new approach to simulate the effects of noise by perturbing matrices of flexibilities. is approach can be useful for research on realistic damage detection. e combined effects of incomplete modal information and noise were studied in a ten-story four-bay building model taken from the literature. e ability of the DFM to assess structural damage was corroborated. Application of the proposed method to a ten-story four-bay building model demonstrates its efficiency to identify the flexibility increment in damaged structural elements.

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“…The prediction of the MTs seismic response is a rather complex problem due to the uncertainties in the characterization of the masonry and the structural configuration. Still, the seismic performance of masonry towers receives interest from the scientific community [1][2][3][4][5] to protect their architectural value through strengthening measure [6][7][8][9][10] and monitoring system [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

et al. 2021

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Masonry towers, located in seismic zones, are vulnerable and prone to damages up to compromise their stability. The scatter of data on the mechanical properties of masonry, geometry and boundary conditions determine a lack of building knowledge on their expected behaviour. Therefore the assessment of the seismic capacity represents a critical task. This paper contributes to the issue of seismic analysis of masonry towers, focusing a meaningful case study: the St.Silvestro belfry in L’Aquila, Italy. The tower, severely damaged by the 2009 earthquake sequence, underwent extensive restoration works, endeavoured to mitigate its vulnerability. The observed seismic damage, the performed no-destructive testing campaign and the accomplished rehabilitation measures are described in the paper. The authors appraised the actual seismic performances of the St.Silvestro belfry, reinforced by the last restoration works. At first, the Operational Modal Analysis (OMA) is carried out to enhance building knowledge. In a second step, a refined finite element model is calibrated on the results from OMA to seize the actual dynamic response. Ultimately, by using the updated finite element model, the authors estimate the fragility curves in terms of peak ground acceleration using truncated incremental dynamic analyses.

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Seismic interferometry for earthquake-induced damage identification in historic masonry towers

Cited by 20 publications

References 63 publications

Structural assessment of bridges through ambient noise deconvolution interferometry: application to the lateral dynamic behaviour of a RC multi-span viaduct

Structural assessment of bridges through ambient noise deconvolution interferometry: application to the lateral dynamic behaviour of a RC multi-span viaduct

Damaged Flexibility Matrix Method for Damage Detection of Frame Buildings

Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

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