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Crack-closing and re-centring attributes were observed in cementitious composites utilising segmented pseudoelastic shape memory alloy fibres (S-PSMAFs) developed in this study. S-PSMAFs, produced via laboratory deep drawing, displayed notable strain recovery capacity during detwinning and martensite phases in direct cyclic tensile tests. Cementitious composites incorporating S-PSMAFs at 0.5%, 0.75%, and 1.0% dosages underwent testing in static and cyclic flexure using both unnotched and notched beams. Results were compared with steel fibre (SF) reinforced specimens. Digital image correlation (DIC) provided full-field strain maps and crack propagation data. The cyclic testing allowed assessment of crack-closing and re-centring behaviour at varying deflections post-cracking and at ultimate limit state deflections. S-PSMAF-reinforced composites maintained a crack-closure ratio between 52% and 60% even at larger crack sizes (e.g., 3 mm). Re-centring ratios ranged from 80% to 55%, dependent on the imposed displacement amplitude of cycles. In contrast, SF-reinforced beams lacked effective crack-closing or re-centring behaviour, with both ratios decreasing drastically to about 10% over cycles. Additionally, S-PSMAF-reinforced composites exhibited higher flexural toughness, ductility, force reduction performance factor, greater energy dissipation, and smaller crack sizes compared to their SF-reinforced counterparts.

Hayatdavoodi, A., Dehghani, A., Aslani, F., & Nateghi-Alahi, F. (2021). The development of a novel analytical model to design composite steel plate shear walls under eccentric shear. Journal of Building Engineering, 44, article 103281. https://doi.org/10.1016/j.jobe.2021.103281

Dehghani, A., & Aslani, F. (2021). Effect of 3D, 4D, and 5D hooked-end type and loading rate on the pull-out performance of shape memory alloy fibres embedded in cementitious composites. Construction and Building Materials, 273, article 121742. https://doi.org/10.1016/j.conbuildmat.2020.121742

Aslani, F., Dehghani, A., & Wang, L. (2021). The effect of hollow glass microspheres, carbon nanofibers and activated carbon powder on mechanical and dry shrinkage performance of ultra-lightweight engineered cementitious composites. Construction and Building Materials, 280, article 122415. https://doi.org/10.1016/j.conbuildmat.2021.122415

Dehghani, A., Hayatdavoodi, A., & Aslani, F. (2021). The ultimate shear capacity of longitudinally stiffened steel-concrete composite plate girders. Journal of Constructional Steel Research, 179, article 106550. https://doi.org/10.1016/j.jcsr.2021.106550

Dehghani, A., & Aslani, F. (2021). Piezoelectric behaviour of hybrid engineered cementitious composites containing shape-memory alloy, steel, and carbon fibres under compressive stress cycles. Construction and Building Materials, 273, article 121671. https://doi.org/10.1016/j.conbuildmat.2020.121671

Dehghani, A., & Aslani, F. (2021). Piezoresistive sensing of cementitious composites reinforced with shape memory alloy, steel, and carbon fibres. Construction and Building Materials, 267, Article 121046. https://doi.org/10.1016/j.conbuildmat.2020.121046

Dehghani, A., & Aslani, F. (2020). The synergistic effects of shape memory alloy, steel, and carbon fibres with polyvinyl alcohol fibres in hybrid strain-hardening cementitious composites. Construction and Building Materials, 252, Article 119061. https://doi.org/10.1016/j.conbuildmat.2020.119061

Dehghani, A., Mozafari, A. R., & Aslani, F. (2020). Evaluation of the efficacy of using engineered cementitious composites in RC beam-column joints. Structures, 27, 151-162. https://doi.org/10.1016/j.istruc.2020.05.045

Dehghani, A., & Aslani, F. (2020). The effect of shape memory alloy, steel, and carbon fibres on fresh, mechanical, and electrical properties of cementitious composites. Cement and Concrete Composites, 112, article 103659. https://doi.org/10.1016/j.cemconcomp.2020.103659

Dehghani, A., & Aslani, F. (2019). A review on defects in steel offshore structures and developed strengthening techniques. Structures, 20, 635-657. Available here

Dehghani, A., & Aslani, F. (2019). Fatigue performance and design of concrete-filled steel tubular joints: A critical review. Journal of Constructional Steel Research, 162, Article 105749. Available here

Aslani, F., Gunawardena, Y., & Dehghani, A. (2019). Behaviour of concrete filled glass fibre-reinforced polymer tubes under static and flexural fatigue loading. Construction and Building Materials, 212, 57-76. Available here

Dehghani, A., Aslani, F., & Liu, Y. (2022). Pullout behaviour of shape memory alloy fibres in self-compacting concrete and its relation to fibre surface microtopography in comparison to steel fibres. Construction and Building Materials, 323, 126570. https://doi.org/10.1016/j.conbuildmat.2022.126570

Dehghani, A., Aslani, F., & Liu, Y. (2022). Pullout behaviour of shape memory alloy fibres in self-compacting concrete and its relation to fibre surface microtopography in comparison to steel fibres. Construction and Building Materials, 323, 126570. https://doi.org/10.1016/j.conbuildmat.2022.126570