Efecto de la forma de la sección de fibra y la fracción volumétrica sobre las propiedades mecánicas de hormigones reforzados con fibras de acero
DOI:
https://doi.org/10.3989/mc.2023.350223Palabras clave:
Hormigón reforzado con fibras de acero, Propiedades mecánicas, Forma de la sección transversal, Modo de falla, RefuerzoResumen
Este estudio presenta la preparación de hormigones reforzados con fibras de acero (SFRCs) utilizando fibras lisas rectas con secciones en forma de sector anular y fibra corrugada con secciones en forma de rectángulo, respectivamente. Las resistencias a la tracción por flexión y división de ambos SFRCs aumentan con el aumento de la fracción de volumen de fibra, mientras que sus resistencias a la compresión inicialmente aumentan, luego disminuyen y luego aumentan nuevamente. Para la misma fracción de volumen de fibras, las propiedades mecánicas del hormigón armado con fibras kisas son superiores a las de los hormigones reforzados con fibras corrugadas. La introducción de fibra de acero cambia el modo de fallo del hormigón simple durante la flexión, de un modo frágil típico a un modo de fallo dúctil bimodal. En comparación con la fibra corrugada, la fibra lisa tiene una unión de interfaz más fuerte con el hormigón y una mayor resistencia a la fricción para el deslizamiento de la fibra y la posterior extracción. Además, la fibra lisa tiene una mayor capacidad portante, lo que la hace más favorable para mejorar las propiedades mecánicas del hormigón en masa.
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Natural Science Foundation of Shaanxi Province
Números de la subvención 2017JQ5113
