Bond-slip response of steel fibers after exposure to elevated temperatures: experimental program and design-oriented constitutive equation
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10.1016/j.compstruct.2020.112916
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/334128
Tipus de documentArticle
Data publicació2021-01
Condicions d'accésAccés obert
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Abstract
This study aimed to evaluate the effect of elevated temperatures on the bond-slip behavior of hooked-end steel fibers. A total of 180 pullout specimens were tested in post-cooling conditions using a double-sided pullout test with multiple embedded fibers for target temperatures between 25 and 750 °C. Results proved that the bond strength significantly increases for temperatures up to 450 °C, and drastically decreases for temperatures of 600 and 750 °C. The contribution of hooks reduced with temperature and is negligible for temperatures higher than 600 °C, while the fiber-matrix frictional interaction seems to improve for all temperatures evaluated. A temperature-sensitive constitutive equation that allows simulating the bond-slip behavior of hooked-end steel fibers is proposed and its suitability confirmed through a numerical model.
CitacióSerafini, R. [et al.]. Bond-slip response of steel fibers after exposure to elevated temperatures: experimental program and design-oriented constitutive equation. "Composite structures", 2021, vol. 255, p. 112916:1-112916:17.
ISSN0263-8223
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0263822320328427
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