Transverse confinement is important in enhancing the mechanical performance of ultra-high-performance concrete(UHPC)columns under axial compressive loads.This research offers a detailed review of the axial compression...Transverse confinement is important in enhancing the mechanical performance of ultra-high-performance concrete(UHPC)columns under axial compressive loads.This research offers a detailed review of the axial compression behaviour(ACB)of UHPC columns confined by transverse steel bars,steel tubes,and fiber-reinforced polymer(FRP)sheets,respectively.The findings indicate that using a combination of transverse steel bars,steel tubes,and FRP sheets significantly boosts the bearing capacity and ductility of UHPC columns,leading to increased peak stress and enhanced peak strain in the confined concrete.The ACB of UHPC columns restrained by transverse steel bars is influenced by the strength and volumetric ratio of the stirrups;higher strength and greater stirrup volume result a lot in enhanced performance.Similarly,the strength and thickness of the steel tube are key factors in the ACB of UHPC confined by steel tubes,with performance improving proportionally to these attributes.For FRP sheet-confined UHPC,the mechanical properties,thickness,and winding configuration of the FRP sheets critically affect the ACB.Thicker sheets and increased winding layers correlate with better mechanical properties.The insights provided in this study offer valuable guidance for engineers considering the implementation of UHPC in construction projects,providing a reliable foundation for optimizing ACB through appropriate transverse confinement strategies.展开更多
文摘Transverse confinement is important in enhancing the mechanical performance of ultra-high-performance concrete(UHPC)columns under axial compressive loads.This research offers a detailed review of the axial compression behaviour(ACB)of UHPC columns confined by transverse steel bars,steel tubes,and fiber-reinforced polymer(FRP)sheets,respectively.The findings indicate that using a combination of transverse steel bars,steel tubes,and FRP sheets significantly boosts the bearing capacity and ductility of UHPC columns,leading to increased peak stress and enhanced peak strain in the confined concrete.The ACB of UHPC columns restrained by transverse steel bars is influenced by the strength and volumetric ratio of the stirrups;higher strength and greater stirrup volume result a lot in enhanced performance.Similarly,the strength and thickness of the steel tube are key factors in the ACB of UHPC confined by steel tubes,with performance improving proportionally to these attributes.For FRP sheet-confined UHPC,the mechanical properties,thickness,and winding configuration of the FRP sheets critically affect the ACB.Thicker sheets and increased winding layers correlate with better mechanical properties.The insights provided in this study offer valuable guidance for engineers considering the implementation of UHPC in construction projects,providing a reliable foundation for optimizing ACB through appropriate transverse confinement strategies.
