Structural Health Monitoring for Seismic Protection of Structure and Infrastructure Systems

Bursi, Oreste S.; Zonta, Daniele; Debiasi, Emiliano; Trapani, Davide

doi:10.1007/978-3-319-75741-4_15

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…For this aim, it is evident that the numerical procedures used to obtain the possible damage state must be reliable and efficient in time-demand, especially for buildings that have strategic or relevant functions (such as hospitals and schools). Finite Element (FE) model updating techniques based on ambient or forced vibrations are tools able to identify and/or localize the damage as a change in the structural stiffness starting from the vibration response measurements (Teughels et al, 2002;Bursi et al, 2014;Bursi et al, 2018;Zarate and Caicedo, 2008). In the field of vibration-based dynamic identification procedures, several methodologies have been proposed for the evaluation of the unknown parameters in civil structures (Mottershead and Friswell, 1993;Teughels and De Roeck, 2004;Christodoulou and Papadimitriou, 2007;Caicedo and Yun, 2011;Vincenzi and Gambarelli, 2017;Ponsi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Efficient two-step procedure for parameter identification and uncertainty assessment in model updating problems

Tondi,

Bovo,

Vincenzi

2023

Front. Built Environ.

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The model updating procedures employed in vibration-based health monitoring need to be reliable and computationally efficient. The computational time is a fundamental task if the results are used to evaluate, in quasi-real-time, the safe or the unsafe state of strategic and relevant structures. The paper presents an efficient two-step procedure for the identification of the mechanical parameters and for the assessment of the corresponding uncertainty in model updating problems. The first step solves a least squares problem, providing a first estimate of the unknown parameters. The second (iterative) step produces a refinement of the solution. Moreover, by exploiting the error propagation theory, this article presents a direct (non-iterative) procedure to assess the uncertainty affecting the unknown parameters starting from the experimental data covariance matrix. To test the reliability of the procedure as well as to prove its applicability to structural problems, the methodology has been applied to two test-bed case studies. Finally, the procedure has been used for the damage assessment in an existing building. The results provided in this article indicate that the procedure can accurately identify the unknown parameters and properly localize and quantify the damage.

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Section: Introductionmentioning

confidence: 99%

Efficient two-step procedure for parameter identification and uncertainty assessment in model updating problems

Tondi,

Bovo,

Vincenzi

2023

Front. Built Environ.

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“…In the last two decades, the use of fast monitoring procedures for the structural evaluation of real engineering structures has steadily grown. 1,2 Indeed, SHM plays a major role in the evaluation of the state of health of public/strategic buildings and infrastructure, especially when deciding whether a structure is safe, requires inspection, or must be abandoned. These aspects promoted the current interest in real-time monitoring applications for early warning damage evaluation, which may be conveniently implemented using low-cost sensors.…”

Section: Introductionmentioning

confidence: 99%

Structural health monitoring of the Ferrara University before and after the 2012 Emilia (Italy) earthquake, and after the damage repairs

Gallipoli

Stabile

Massolino

et al. 2019

Structural Health Monitoring

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In this article, a framework of building monitoring is developed and transient and permanent variations of the fundamental period of vibration caused by both damage and repair interventions are investigated. The buildings of the University of Ferrara (Emilia-Romagna Region, Northern Italy), struck by the 2012 Emilia seismic sequence, were monitored using both temporary and permanent equipment: the first one to perform ambient vibration tests and the second one to implement permanent real-time monitoring for earthquake recording. Three on-demand ambient vibration tests were performed at each floor of the buildings: the first dataset was acquired a few months before the mainshock occurred on 20 May 2012 ( ML = 5.9, 6.8 km depth and 30 km epicentral distance); the second was acquired right after the end of the sequence, when the building showed slight damage (degree 1 according to the European Macroseismic Scale 98); finally, the third dataset was acquired in 2016 after the repair intervention. The data analysis clearly documented the permanent drop of the first vibration frequency as a symptom of the damage and its partial recovery that followed the repairs. The permanent real-time monitoring system, despite the fact that it was implemented using low-cost sensors, provided an insight into the intra-event frequency variation, allowing in turn a preliminary damage assessment.

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The value of seismic structural health monitoring for post-earthquake building evacuation

Giordano

Iacovino

Quqa

et al. 2022

Bull Earthquake Eng

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In the aftermath of a seismic event, decision-makers have to decide quickly among alternative management actions with limited knowledge on the actual health condition of buildings. Each choice entails different direct and indirect consequences. For example, if a building sustains low damage in the mainshock but people are not evacuated, casualties may occur if aftershocks lead the structure to fail. On the other hand, the evacuation of a structurally sound building could lead to unnecessary financial losses due to business and occupancy interruption. A monitoring system can provide information about the condition of the building after an earthquake that can support the choice between several competing alternatives, targeting the minimization of consequences. This paper proposes a framework for quantifying the benefit of installing a permanent seismic structural health monitoring (S2HM) system to support building evacuation operations after a seismic event. Decision-makers can use this procedure to preventively evaluate the benefit of an SHM system and decide about the worthiness of its installation.

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Structural Health Monitoring for Seismic Protection of Structure and Infrastructure Systems

Cited by 8 publications

References 19 publications

Efficient two-step procedure for parameter identification and uncertainty assessment in model updating problems

Efficient two-step procedure for parameter identification and uncertainty assessment in model updating problems

Structural health monitoring of the Ferrara University before and after the 2012 Emilia (Italy) earthquake, and after the damage repairs

The value of seismic structural health monitoring for post-earthquake building evacuation

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