Bond deterioration effects on corroded <scp>RC</scp> bridge pier in seismic zone

Bartolozzi, Mara; Casas, Joan R.; Domaneschi, Marco

doi:10.1002/suco.202000681

Cited by 17 publications

(5 citation statements)

References 13 publications

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“…The reduction in the overall beam height is considered only for the very heavily corroded beams

η_{w, sn} > 75 %

from reference 6 (being

η_{w, sn}

the web reinforcement section loss ratio, see Notations for a detailed definition). Despite the reasonably satisfactory results obtained by comparing the shear strength predictions by the CCCM extension for corroded beams with the empirical results for the slender beams included in the database, future developments (outside the scope of this article) should include consideration of bond deterioration, 30,31 reduction of concrete compressive strength at cracked concrete and change in the mechanical properties of the deteriorated bars 32,33 …”

Section: The Compression Chord Capacity Model For Slender Rc Beams An...mentioning

confidence: 98%

Long‐term shear strength of RC beams based on a mechanical model that considers reinforcing steel corrosion

Frontera

Cladera

2022

Structural Concrete

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Corrosion of stirrups (generally with small diameters and concrete covers) significantly affects the shear strength of reinforced concrete elements. As shear failures may lead to brittle collapses, hence the need to avoid them during structures' entire service life. The Compression Chord Capacity Model (CCCM), a shear mechanical model, was recently extended to predict the strength of corrosion-damaged beams by identifying the model parameters that could be most affected by steel corrosion. In this paper, the CCCM is combined with two material deterioration models included in the new Spanish Structural Code, and considers carbonation of concrete or chloride ions, to predict long-term shear strength evolution. Finally, a parametric analysis is carried out to explore the effect of the most influential parameters on shear strength degradation according to the used models and depending on different exposure classes.

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“…The reduction in the overall beam height is considered only for the very heavily corroded beams

η_{w, sn} > 75 %

from reference 6 (being

η_{w, sn}

Section: The Compression Chord Capacity Model For Slender Rc Beams An...mentioning

confidence: 98%

Long‐term shear strength of RC beams based on a mechanical model that considers reinforcing steel corrosion

Frontera

Cladera

2022

Structural Concrete

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“…La reducción del canto se considera únicamente para las vigas severamente corroídas, ηw,sn>75%, de la referencia [6] (siendo ηw,sn el ratio de pérdida de sección de la armadura a cortante, ver la Notación para una definición más detallada). A pesar de los resultados razonablemente satisfactorios obtenidos al comparar las predicciones de la resistencia a cortante usando la extensión del CCCM para vigas que han sufrido ataques por corrosión con los resultados empíricos para las vigas esbeltas incluidas en la base de datos, desarrollos futuros (fuera del alcance de este artículo) deberían incluir la consideración del deterioro de la adherencia [30,31], la reducción de la resistencia a la compresión del hormigón fisurado y el cambio en las propiedades mecánicas de la barras corroídas [32,33]. Figura 4.…”

Section: Verificación Experimentalunclassified

Predicción a largo plazo de la resistencia a cortante de vigas de hormigón armado basada en un modelo mecánico considerando la corrosión de la armadura

Frontera,

Cladera

2024

hya

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La corrosión de los cercos, generalmente con un menor diámetro y recubrimiento, afecta significativamente la resistencia a cortante de los elementos de hormigón armado. Puesto que las roturas a cortante pueden provocar colapsos de carácter frágil, es necesario evitarlas durante toda la vida útil de la estructura. El Compresion Chord Capacity Model (CCCM, modelo de capacidad de la cabeza comprimida) es un modelo mecánico que ha sido extendido recientemente para predecir la resistencia a cortante de elementos dañados por los efectos de la corrosión. Este trabajo combina la capacidad del modelo mecánico con los dos modelos de deterioro incluidos en el nuevo Código Estructural para evaluar la resistencia a cortante a largo plazo, permitiendo considerar tanto la corrosión por carbonatación como la inducida por iones cloruro. Finalmente, en el artículo se lleva a cabo un análisis paramétrico para explorar el efecto de los parámetros más influyentes en la degradación de la resistencia a cortante según los modelos utilizados y en función de diferentes clases de exposición. Traducido por Antoni Cladera del artículo original publicado por Wiley en la revista Structural Concrete: Frontera A, Cladera A. Long-term shear strength of RC beams based on a mechanical model that considers reinforcing steel corrosion. Structural Concrete. 2023; 24(1): 25–40. https://doi.org/10.1002/suco.202200428

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“…The impacts of cumulative seismic damage and corrosion on the lifespan of bridges are further explored by Kumar et al [3], who point out that cumulative seismic damage has a longer-lasting impact on structural dependability than corrosion. The effects of corrosion degradation on the seismic response of RC bridge piers have also been investigated [4,5]. It has been made clear how bonding contributes to the seismic capacity's decline.…”

Section: Introductionmentioning

confidence: 99%

Structural Control and Health Monitoring Contributions to Service‐life Extension of Bridges

Domaneschi,

Martinelli,

Cucuzza

et al. 2023

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Transportation Infrastructure networks are acknowledged as crucial for economic growth, territorial coherence, and social change. Unfortunately, some of this vast system's most important structural elements, like the bridges, are rapidly aging while the load conditions that these systems were designed to withstand are now being exceeded as a result of various threats, including natural disasters and newly discovered man‐made phenomena. Considering that a large amount of the existing bridge stock was built many years ago, if countermeasures are not taken, deterioration phenomena and an increase in service conditions larger than those used in the original design may have contributed to diminishing the dependability level. Hence, it becomes crucial to evaluate the existing status of transportation infrastructure, make predictions about its future state, and safeguard it from outside threats. This contribution focuses on an in‐depth investigation of the impact of Structural Control and Health Monitoring in increasing the structural resilience of transportation infrastructure and subsequently its life‐cycle.

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Bond deterioration effects on corroded RC bridge pier in seismic zone

Cited by 17 publications

References 13 publications

Long‐term shear strength of RC beams based on a mechanical model that considers reinforcing steel corrosion

Long‐term shear strength of RC beams based on a mechanical model that considers reinforcing steel corrosion

Predicción a largo plazo de la resistencia a cortante de vigas de hormigón armado basada en un modelo mecánico considerando la corrosión de la armadura

Structural Control and Health Monitoring Contributions to Service‐life Extension of Bridges

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