Artículos (Estructuras de Edificación e Ingeniería del Terreno)

URI permanente para esta colecciónhttps://hdl.handle.net/11441/24701

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Examinando Artículos (Estructuras de Edificación e Ingeniería del Terreno) por Agencia financiadora "Agencia Estatal de Investigación. España"

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    Acceso AbiertoArtículo
    Analysis of the main geometrical characteristics that affect the bonding of ribs in rebars thinly covered to repair masonry structures
    (Elsevier, 2021-11-01) Rodríguez-Mayorga, Esperanza; Hortigón Fuentes, Beatriz; Fernández Ancio, Fernando; Universidad de Sevilla. Departamento de Estructuras de Edificación e Ingeniería del Terreno; Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras; European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER); Agencia Estatal de Investigación. España; Universidad de Sevilla. TEP245: Ingeniería de las Estructuras; Universidad de Sevilla. TEP206: Sath Sostenibilidad en Arquitectura, Tecnología y Patrimonio: Materialidad y Sistemas Constructivos; Universidad de Sevilla. TEP963: Ingeniería de Estructuras y Materiales
    The use of stainless steel rebars in the repair of masonry structures is widespread and has traditionally produced excellent results. In these cases, rebars usually present diameters of below 8 mm covered with thin layers of mortar or grout. Research is necessary to characterise bonding under these particular conditions, hitherto unavailable. In this research, the geometry of ribs is parameterised and later analysed through the Finite Element Method. To this end, the Microplane model and Cohesive zone model are employed. Based on the numerical results, the geometrical aspects of the ribs that mostly affect bonding are identified and discussed.
  • Miniatura
    Acceso AbiertoArtículo
    Identification of microplane coefficients to reproduce the behaviour of ultrafine blast-furnace slag binder grout samples
    (Springer, 2024-08-17) Rodríguez-Mayorga, Esperanza; Jiménez Alonso, Javier Fernando; Santiago Espinal, José Antonio; Fernández Ancio, Fernando; Hortigón Fuentes, Beatriz; Universidad de Sevilla; Agencia Estatal de Investigación. España; Junta de Andalucía; US.20-08; Universidad de Sevilla. TEP245: Ingeniería de las Estructuras; Universidad de Sevilla. TEP963: Ingeniería de Estructuras y Materiales; Universidad de Sevilla. TEP206: Sath Sostenibilidad en Arquitectura, Tecnología y Patrimonio: Materialidad y Sistemas Constructivos
    Ultra-fine blast-furnace slag binders have recently been introduced to repair masonry. The reduced particle diameter of these binders makes them especially suitable for use as grouts, since this characteristic enables these grouts to fill even the smallest voids. The current necessity and effectiveness of Finite Element Analysis in any process concerning construction, repair or reinforcement of building structures remains unquestionable. In this way, the calibration of Finite Element material models for their correct performance has become compulsory. Regarding quasi-brittle materials, such as mortar and grouts, the Microplane model is recommended to reproduce their behaviour. This paper is targeted towards obtaining Microplane model coefficients to exactly reproduce the behaviour of ultrafine blast-furnace slag grout samples. To this end, several compressive tests have been carried on in order to obtain the experimental stress–strain curves that define the behaviour of these samples. Furthermore, reverse engineering by means of an optimisation algorithm successfully attained the possible coefficients to reproduce this material with the Microplane model. The correctness of these coefficients has been verified with a new campaign composed of compressive tests, Double Punch tests, and flexural tests. These tests have been reproduced by Finite Element Analysis, thereby confirming the accuracy of the set of coefficients. Thus, two are the main conclusions obtained: (1) the framework for the modelling of ultra-fine blast-furnace slag grout elements based-on the Microplane model has been proposed, implemented and validated; and (2) a value for the coefficients of the abovementioned model has been proposed.