Impact of fiber geometry, temperature, loading rate, and concrete mix on the pull-out resistance of iron-based shape memory alloy (Fe-SMA): Experimental investigation

Alireza Tabrizikahou; Mieczysław Kuczma; Moslem Shahverdi

doi:10.1016/j.conbuildmat.2024.139298

Impact of fiber geometry, temperature, loading rate, and concrete mix on the pull-out resistance of iron-based shape memory alloy (Fe-SMA): Experimental investigation

Abstrakt

An experimental campaign was conducted to determine the pull-out resistance of iron-based shape memory alloy (Fe-SMA) fibers embedded in high-performance fiber-reinforced concrete (HPFRC). Seventy-two specimens were examined using different thermal heating temperatures, loading rates, fiber end shapes, and concrete mixtures. The results indicated that end-hooked fibers had double the pull-out resistance of straight fibers. Increasing the temperature greatly reduced pull-out resistance in end-hooked fibers but had minimal impact on straight fibers. Concrete mixtures with higher compressive and flexural strengths exhibited greater pull-out resistance. Finally, the loading rate had a negligible effect; a tenfold increase induced merely a slight rise in pull-out resistance.