This study investigates the flexural behavior and performance of beam-column connections in concentrically braced frames (CBFs) as part of evaluating the reserve lateral-load-resisting capacity in CBFs. Seven beam-column connections with gusset plates, employing double angle and end plate details, were studied using full-scale experiments to determine their flexural strength, stiffness and ductility. In this paper, the effects of end plate and angle thickness are evaluated, along with the influence of bolt distribution and weld type (end plate connections) and the impact of a supplementary seat angle (double angle connections). The connection behavior and performance are quantified using normalized moment vs. story drift data. In comparison to a baseline double angle detail, all connection variations increased the strength and stiffness. The end plate variations resulted in larger increases in strength, but were limited by bolt fracture. The double angle variations increased the strength by smaller margins, but strength loss occurred more gradually and larger drifts were sustained.