Advanced Study of Columns Confined by Ultra-High-Performance Concrete and Ultra-High-Performance Fiber-Reinforced Concrete Confinements

The need for concrete with ‘super’ strength and ductility greater sustainability has been answered by the existence of ultra-high-performance (UHPC) fiber-reinforced (UHPFRC). Over last decades, UHPFRC implemented in actual structures, as well used to retrofit structural elements, including columns. However, use UHPC confinement strengthen normal columns is still limited. Therefore, this research aims investigate advanced performance using context such columns, load capacity, stress–strain behavior, crack pattern failure mode. This an study several investigations previously carried out other authors on characteristics UHPFRC, confined UHPFRC. methods are experimental analytical. results were compared analytical calculations validation. produced 12 short-column specimens (CF0 series) (CF1 CF2 that contained 0%, 1%, 2% fiber also tested axial loading various eccentricities follows: e = 0, 35, 70 mm. found (NSC) could sustain a higher maximum stress, vertical deformation strain control specimens. It was noted specimen CF2-35 had highest deformation, C-0 (control column no confinement). (column volume eccentricity 35 mm) exhibited ductile mode very minor cracks. 75% 0–39% errors 25% 0–13% errors. proved addition minimizes prevents spalling column. led conclusion confinements will increase