Robust output-only modal identification and monitoring of buildings in the presence of dynamic interactions for rapid post-earthquake emergency management

Rainieri, Carlo; Fabbrocino, Giovanni; Manfredi, Gaetano; Dolce, Mauro

doi:10.1016/j.engstruct.2011.10.001

Cited by 41 publications

(21 citation statements)

References 6 publications

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“…This relevant feature of the output‐only procedures has not been completely exploited for vertical slender structures, such as the case of bell towers (Lepidi et al., ; Foti et al., ,) in which an iteration of the sensor array configuration is not easily implementable due to the difficulty of accessing the sensor locations. On the other hand, the extreme convenience in an onsite testing campaign of avoiding controlled sources of external vibration, such as a vibrodyne, makes the output‐only procedures extremely attractive for rapid testing (Rainieri et al., ), for example, to better understand the real dynamic behavior of a certain structure after an earthquake in preparation for the application of simple or sophisticated vibration control techniques (Gattulli et al., ).…”

Section: Introductionmentioning

confidence: 99%

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Foti

Gattulli

Potenza

2014

Computer aided Civil Eng

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Knowledge of the dynamic behavior of complex buildings subjected to near‐fault earthquakes may be enriched by valuable information obtained through rapid onsite dynamic testing to aid in the design of appropriate retrofitting interventions. Through a case study, the article demonstrates the enhancement in comprehension of the structural behavior obtained by means of a 2‐day testing campaign conducted on a complex building of the Engineering Faculty, Edifice A, which was heavily damaged in the 2009 L'Aquila earthquake. The onsite testing was carried out with a network of 13 accelerometers opportunely located to identify the dynamic characteristics of the structure by means of ambient noise‐induced vibration. Enhanced Frequency Domain Decomposition (EFDD) and Stochastic Subspace Identification (SSI) output‐only procedures were both used to identify the main modal parameters of two substructures of the building. The modal characteristics were used to update a finite element model representing small amplitude vibrations of the damaged structures. The direct comparison of the identified modal features with finite element models, in which damaged member locations are determined by onsite visual observations, has permitted identification of a model representative of the structural behavior of the building in the immediate postearthquake conditions.

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Section: Introductionmentioning

confidence: 99%

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Foti

Gattulli

Potenza

2014

Computer aided Civil Eng

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“…Frequency band around the selected peak is defined by using Modal Assurance Criterion (eq. 13) of which value is greater than 0.9 [6][7][8]. Correlation function subsequently obtained by inverse FFT is shown in Fig.…”

Section: Figure 5 Plot Example Of Singular Valuesmentioning

confidence: 99%

“…is not known in OMA, it is necessary to make an assumption that input is represented by a white noise that has a flat power spectral density over the entire frequency spectrum [8]. Then spectral density matrix of the measured responses can be expressed as [6,7]:…”

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confidence: 99%

Results and Experiences from the Application of Digital Image Correlation in Operational Modal Analysis

Hagara

2013

APH

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“…Furthermore, it allows monitoring the evolution of the structure's safety during the 76 earthquake crisis while it constitutes the key component for rapid damage assessment or the 77 preparation of reliable damage scenarios. In [7] an approach for robust evaluation and 78 monitoring of instrumented buildings is proposed in the context of rapid post-earthquake 79 emergency management. In [6] the main aim is to show how the experimental model 80 extracted from ambient vibration measurements may contribute in the framework of seismic 81 vulnerability assessment of existing buildings in moderate seismic-prone regions.…”

Section: [6]) 73mentioning

confidence: 99%

“Time-building specific” seismic vulnerability assessment of a hospital RC building using field monitoring data

Karapetrou

Manakou

Bindi

et al. 2016

Engineering Structures

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14In the context of seismic vulnerability assessment of reinforced concrete (RC) buildings, the use 15 of field monitoring data constitutes a significant tool for the representation of the actual structural state, 16reducing uncertainties associated with the building configuration properties as well as many non-17 physical parameters (age, maintenance, etc.), enhancing thus the reliability in the risk assessment 18 procedure. In this study, the seismic vulnerability of existing RC buildings is evaluated, combining 19 through a comprehensive methodology, the numerical analysis and field monitoring data. The 20 proposed methodology is highlighted through the derivation of "time-building specific" fragility curves 21for an eight-storey RC structure (hospital building), built almost five decades ago, that is composed by 22 two adjacent units connected with a structural joint. The assessment of the dynamic characteristics is 23 performed using ambient noise measurements recorded by a temporary seismic network which was 24 deployed inside the hospital. The modal identification results are used to update and better constrain 25 the initial finite element model of the building, which is based on the available design and construction 26 documentation plans. Three-dimensional incremental dynamic analysis is performed to derive the 27 fragility curves for the initial as built model ("building-specific") and for the real structures as they are 28 nowadays ("time-building specific"). The initial "building-specific" curves are evaluated through their 29 comparison with conventional generic curves that are commonly used in risk assessment studies. 30Moreover, in order to enhance the reliability of the obtained results, the "time-building specific" fragility

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Robust output-only modal identification and monitoring of buildings in the presence of dynamic interactions for rapid post-earthquake emergency management

Cited by 41 publications

References 6 publications

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Results and Experiences from the Application of Digital Image Correlation in Operational Modal Analysis

“Time-building specific” seismic vulnerability assessment of a hospital RC building using field monitoring data

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