Structural Performance of Steel Beam End Connection With Robotic Upward Welding Attached to CFT Column

When weld access holes are provided, the deformation capacity of beam end connections is reduced, leading to the typical inclusion of horizontal haunches to prevent beam end fracture. However, horizontal haunches have productivity issues. On-site robotic upward welding offers a potential solution. Therefore, this study conducted structural experiments to evaluate the performance of beam end connections with robotic upward welding attached to concrete filled tubular column. The results confirmed that beam end connections with on-site robotic upward welding exhibit high deformation capacity equivalent to beam end connections with shop welding without weld access holes.