Ultra-high-performance concrete hollow columns confined with high-strength steel

Reinforced concrete bridge columns with hollow cross sections may be a viable solution for long-span bridges. Meanwhile, several concerns are raised about the seismic behaviour of existing hollow-section bridge columns, such as excessive concrete spalling, longitudinal rebar buckling, and undesirable shear failures. Ultrahigh-performance concrete (UHPC) has the potential to address these seismic performance issues. However, a major impediment …