Capacidad resistente de pilas metálicas tubulares circulares rellenas de hormigón (CFT) en puentes integrales

Chacón, Rolando; Arrizabalaga, Enrique Mirambell; Real, Esther

doi:10.3989/ic.11.098

Cited by 4 publications

(5 citation statements)

References 20 publications

(27 reference statements)

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“…These authors concluded that the ultimate load capacities predicted by [8][9][10][11] lead to satisfactory results. Furthermore, comparisons between these proposals and 344 experimental tests found in [1,2] were performed in [13]. It was concluded that the predictions given in [10,11] provide better agreement with tests among those studied.…”

Section: ! =mentioning

confidence: 88%

“…More recently, in a previous work performed in [13], it is statistically demonstrated that in short columns (no overall buckling observed) the proportion L/D may also play a role in the definition of N pl .…”

Section: ! =mentioning

confidence: 91%

“…(4). Cross-sectional interaction diagram for a CFT [13]. (E•I) eq which accounts for the presence of two different materials.…”

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confidence: 99%

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Circular Concrete-Filled Tubular Columns: State of the Art Oriented to the Vulnerability Assessment

Chacón¹

2015

TOCIEJ

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The vulnerability of framed structures has been analyzed until recently from two different perspectives: Structural and socio-economical. For the sake of assessing the former, indexes and objective measurements have been proposed in the literature. These indexes include relatively accurate assessments of the strength, ductility, energy absorption, fire, blast response and resilience of the elements in order to define a higher-level structural magnitude. Similar approaches are performed with the latter when it comes to assessing damage, economical aspects, social and other important factors. On the other hand, concrete-filled tubes (CFT) have proven structurally efficient due to their relatively high strength-toweight ratio. Considerably complete state-of-the-art reviews are available for these members when it comes to analyzing their strength and overall or local buckling in static and/or dynamic responses. Reviews concerning important issues related to the structural vulnerability of those members are, however, scarce. In this paper, a state-of-the art dealing with the behavior of concrete-filled tubes is presented. The novelty of such approach is to present research concerning CFT but, in this case, from a structural vulnerability perspective (not socioeconomical), that is to say, summarizing references concerning seismic response, fire resistance, impact response and other main characteristics that are further used when defining the aforementioned indexes. Relevant numerical, experimental and theoretical studies presented in recent years are pinpointed as well as potential research trends.

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confidence: 88%

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confidence: 91%

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Circular Concrete-Filled Tubular Columns: State of the Art Oriented to the Vulnerability Assessment

Chacón¹

2015

TOCIEJ

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“…Estas ecuaciones permiten estimar la presión de confinamiento generada, así como las tensiones y deformaciones que dicha presión induce en el tubo y el hormigón, ecuaciones de la (1) a (6). La distribución de tensiones de la sección compuesta frente a flexión y axil se puede estimar con las ecuaciones (7) y (8).…”

Section: Hormigón Expansivounclassified

“…En los últimos años se han llevado a cabo numerosos estudios teóricos y experimentales acerca del comportamiento estructural de los CFT, [2]. Destacan entre otros, los publicados por Schneider [3], O'Shea et al [4], Hatzigeorgiou [5][6], de Oliveira et al [7] y Chacón et al [8]. Varios autores señalan que en la mejora de la capacidad resistente que se obtiene con el sistema mixto resulta relevante el grado de confinamiento alcanzado en el hormigón, [9].…”

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Tubos rellenos de hormigón expansivo. Aplicación al viaducto sobre el barranco de Erques. Programa experimental e instrumentación in situ

Jiménez¹,

Martı́nez²,

Ramírez³

et al. 2021

hya

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El viaducto sobre el barranco de Erques (Tenerife) es un puente formado por dos arcos con tablero intermedio de 110 m de longitud y 17,7 m de altura de clave. Cada arco está compuesto por dos tubos de acero, de 1020 mm de diámetro, rellenos de hormigón expansivo. En este artículo se describe el programa experimental que ha servido de base para la ejecución de los arcos del viaducto. También se detalla la instrumentación realizada para registrar las deformaciones longitudinales y circunferenciales de los tubos y las temperaturas de los mismos durante el proceso de hormigonado y posterior endurecimiento, con el objeto de estimar el efecto expansor del hormigón y comprobar si los resultados son acordes a los determinados en la investigación previa. La caracterización del hormigón expansivo para su aplicación en estructuras tubulares requiere realizar ensayos de expansión libre y confinada del hormigón para ajustar la deformación de expansión necesaria. Estos ensayos se complementaron con otros para determinar la carga de deslizamiento del núcleo de hormigón dentro del tubo de acero a temperatura ambiente y con calentamiento uniforme y diferencial, realizados para evaluar la incidencia de los efectos térmicos en la resistencia a esfuerzos rasantes de la interfase tubo-hormigón.

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Improved predictive model to the cross-sectional resistance of CFT

Mansouri

Chacón

2017

J Mech Sci Technol

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This paper proposes an improved theoretical prediction equation for Concrete-filled steel tubes (CFT) subjected to compressive forces. This ultimate load capacity is inferred from a database of 344 experimental results reported in the literature by using Gene expression programming (GEP). Moreover, a series of structural comparisons between design provisions, other mechanically-derived expressions and the proposed prediction are addressed. The levels of accuracy, practical use and phenomenological understanding of the phenomenon are pinpointed. The results obtained are in good agreement with both the experimental and theoretical predictions. Advantages and disadvantages of such type of predictions are pinpointed.Peer ReviewedPostprint (author's final draft

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Capacidad resistente de pilas metálicas tubulares circulares rellenas de hormigón (CFT) en puentes integrales

Cited by 4 publications

References 20 publications

Circular Concrete-Filled Tubular Columns: State of the Art Oriented to the Vulnerability Assessment

Circular Concrete-Filled Tubular Columns: State of the Art Oriented to the Vulnerability Assessment

Tubos rellenos de hormigón expansivo. Aplicación al viaducto sobre el barranco de Erques. Programa experimental e instrumentación in situ

Improved predictive model to the cross-sectional resistance of CFT

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