Flexural Properties and Cyclic LoadingPerformance of SMAF-FRCC

doi:10.16552/j.cnki.issn1001-1625.2024.1296

Abstract

Abstract: Superelastic shape memory alloy fibers (SMAF) were randomly interspersed within a modified polypropylene (PP) fiber-reinforced cementitious composite (FRCC) mixture to fabricate self-centering shape memory alloy fiber reinforced cementitious composite (SMAF-FRCC) composite beam specimens. This study investigated the effects of the diameter, content, and length of SMAF on the flexural strength, self-centering performance, and energy dissipation capacity of SMAF-FRCC composite beam specimens. The results demonstrate that the addition of SMAF significantly improves the flexural strength, self-centering performance, and energy dissipation capacity of the composite beam specimens, enhancing the material's ductility and toughness. Among them, When the length of SMAF is 25 mm and the content is 0.50% (volume fraction), flexural strength of the specimens is the highest, which is increased by 21.84% compared with the control group. When the length of SMAF is 20 mm and the content is 0.75% (volume fraction), the self-centering performance of the specimen is the best as a whole. In the last cycle of the cyclic loading flexural test, the self-centering ratio is increased by 19.57% compared with the control group. The study provides experimental evidence for the future development of SMAF-FRCC smart material systems with crack self-healing and deflection self-centering capabilities.

Key words: fiber-reinforced cementitious composite, shape memory alloy fiber, superelasticity, flexural strength, self-centering, energy dissipation

CLC Number:

TU528.58

XU Longfei, LIU Shixi, LI Yanjie, YANG Lingqiang. Flexural Properties and Cyclic LoadingPerformance of SMAF-FRCC[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2378-2387.

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