Continuous Dynamic Monitoring of Bridges: Different Perspectives of Application

Cunha, Álvaro; Caetano, Elsa; Moutinho, Carlos

doi:10.4028/www.scientific.net/amr.745.89

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…In this context, detecting a damage at its earliest stage would mean an important achievement in terms of passenger safety and maintenance costs: it would allow to avoid sudden catastrophic failures and head to huge savings (i.e., optimized maintenance strategy). To do so, it is mandatory to get rid of any other environmental and operational aspects that influence the time evolution of the natural frequencies (i.e., temperature): this implies the use of processing algorithms such as the principal component analysis (PCA), as illustrated by the authors in [6]. Exploiting the natural frequency evolution as a structural health monitoring tool [7] requires the definition of a reference baseline to compare the new data with.…”

Section: Introductionmentioning

confidence: 99%

SHM Campaign on 138 Spans of Railway Viaducts by Means of OMA and Wireless Sensors Network

Bernardini

Benedetti

Somaschini

et al. 2022

Lecture Notes in Civil Engineering

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Condition-based monitoring applied to railway bridges represents a topic of major importance and interest among developed countries, such as Italy. In fact, bridges and viaducts represent key components of the transportation network, and therefore they increasingly draw infrastructure managers' attention. The present work is the result of a project carried out by Politecnico di Milano, consisting of a large experimental campaign conducted on a series of viaducts of the Italian railway network. The ensemble of structures under investigation is composed by 11 viaducts, for a total amount of spans equal to 138. According to a similarity criterion, the latter were subdivided into 8 groups, featured by different properties. Due to its transient nature, the experimental campaign was conducted by means of wireless accelerometers, and it consisted in the extraction of the main modal parameters of each analyzed viaduct span, as well as the characterization of the trains travelling on the line. Through the adoption of an operation modal analysis (OMA) technique, it was then possible to construct a large database of the dynamic features concerning the studied viaducts. This database may be exploited for future studies as an important baseline reference condition, by which potential outlier values may be captured, as a sign of damage occurrence among the monitored structures.

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Section: Introductionmentioning

confidence: 99%

SHM Campaign on 138 Spans of Railway Viaducts by Means of OMA and Wireless Sensors Network

Bernardini

Benedetti

Somaschini

et al. 2022

Lecture Notes in Civil Engineering

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“…Las variaciones térmicas afectan, en gran medida, a las frecuencias naturales de las estructuras, esto es un hecho importante que debe tenerse en cuenta siempre. Se han llegado a constatar en estructuras especialmente sensibles, como pasarelas peatonales, variaciones en un rango de 15,3% -21,4% a lo largo de un ciclo térmico [15].…”

Section: La Dinámica Y El Análisis Modalunclassified

El reto de aportar un carácter dinámico a las inspecciones de estructuras

Corral

González²

2021

hya

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La operatividad y seguridad de las redes de transporte es un asunto de vital importancia para el bienestar económico y social de cualquier país. Dentro de dichas redes, no cabe duda de que los puentes constituyen puntos críticos por su especial vulnerabilidad y las consecuencias de todo tipo que conllevaría su hipotético fallo. Por ello, la evaluación de su salud estructural debe ser una cuestión primordial en todo sistema de gestión de puentes, y más teniendo en cuenta que muchos de ellos se encuentran próximos al fin de la vida útil para la que fueron proyectados. La evaluación de su estado de conservación se basa en la actualidad, de forma mayoritaria, en las inspecciones visuales. Este artículo se centra en las posibilidades que ofrecen los ensayos dinámicos, los avances en las monitorizaciones, comunicaciones y tratamiento de datos, para complementar y reforzar dichas inspecciones, eliminando la subjetividad y llegando, en tiempo real, a donde el ojo humano no puede llegar, de forma que los gestores de los puentes puedan decidir cómo, dónde y cuándo actuar de una manera más racional, objetiva y eficaz.

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