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Descripción
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| The awareness of damages caused by impacts in civil structures has increased for the last decades. While some research has been devoted so far to evaluate the impact strength of concrete structures and to the improvement of such resistance with the addition of steel fibers, the assessment of the structural condition after the impact event still remains almost unexplored. In fact, the residual capacity of reinforced SFRC (steel fiber-reinforced concrete) structures should be considered as one of the main advantages of the employ of SFRC in structures expected to suffer impacts because it seems logical to assume that impacts, in case of occurrence, will cause damage. The understanding of the residual capacity of impact-damaged structures, in terms of strength and energy absorption, would be decisive to safely perform evacuation and recovery operations, as well as evaluate rehabilitation tasks. This paper presents a research on the residual capacity of pre-impacted reinforced SFRC beams. Seven mixtures of SFRC are evaluated, including three types of steel fibers and two values of fiber amount (as well as companion unreinforced plain concrete mixture). The research includes an experimental campaign as well as a model to understand the contribution of the SFRC to the strength and ductility of undamaged and damaged specimens. Among the conclusions, it has been found out that the failure mode (i.e. shear- or flexure-governed) of damaged specimens is dependent on the crack pattern caused by the impact, and it can be different from the failure mode of undamaged specimens. | |
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Internacional
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JCR del ISI
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Título de la revista
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Structural Concrete |
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ISSN
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1464-4177 |
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Factor de impacto JCR
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1,384 |
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Información de impacto
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Datos JCR del año 2017 |
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Volumen
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20(2) |
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DOI
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Número de revista
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Desde la página
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597 |
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Hasta la página
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613 |
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Mes
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SIN MES |
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Ranking
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