| Yazarlar (1) |
Dr. Öğr. Üyesi Hakan ÇAĞLAR
Kırşehir Ahi Evran Üniversitesi, Türkiye |
| Özet |
| This study introduces a novel steel fiber with spherical ends, designed to enhance mechanical interlocking in ultra-high-performance concrete (UHPC) matrices. The UHPC was further reinforced with zirconium oxide (ZrO₂) nanoparticles to improve its mechanical properties. A nonlinear finite element method (FEM), along with a multiscale modeling approach, was used to simulate fiber pull-out and flexural behavior. Experimental tests, including compressive and tensile strength measurements, were conducted to calibrate and validate the nu- merical models. Results show that the optimal nanoparticle content is 1.0 wt%, which increased compressive and tensile strengths by 37 % and 38 %, respectively. Compared to straight fibers, the spherical-end fibers exhibited significantly improved performance, with a 124 % increase in pull-out force and a 188 % increase in pull-out energy. In three-point bending tests, UHPC specimens with 2 vol% spherical-end fibers showed a 214 % in- crease in flexural strength over plain UHPC and about 102 % over those with straight fibers. These results un- derscore the effectiveness of spherical-end fibers in improving the toughness and load-bearing capacity of UHPC, making them highly suitable for high-performance structural applications. |
| Anahtar Kelimeler |
| Spherical-end steel fibers, Pull-out behavior, Ultra-high-performance concrete (UHPC), Zirconium OXide Nanoparticles, Multi-scale modeling, Flexural strength |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Construction and Building Materials |
| Dergi ISSN | 0950-0618 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Dergi Grubu | Q1 |
| Makale Dili | İngilizce |
| Basım Tarihi | 05-2025 |
| Cilt No | 485 |
| Sayı | 485 |
| Sayfalar | 1 / 17 |
| Doi Numarası | 10.1016/j.conbuildmat.2025.141898 |
| Makale Linki | https://www.sciencedirect.com/journal/construction-and-building-materials/vol/485/suppl/C |
