To explore the flexural performance of steel frame beam-column connections with gusset plate,the models of 6 steel frame beam-column joints,connected with double web angle or end plate were established by using the C3D8I element in ABAQUS finite element software.There were two of the joints with gusset plate and four without gusset plate.Considering two conditions in which the joints were respectively under the action of positive and negative bending moment,the effects of gusset plate on the load bearing capacity and rotational stiffness of steel frame beam-column joints were studied.The influences of the measures,such as adding a seat angle and setting an one-side extended end-plate,on the flexural performance of steel frame beam-column connections with gusset plate were investigated.The results show that the gusset plate makes the steel frame beam-column joints semi-rigid,which significantly improves the flexural performance of the joints.Adding the seat angle and setting the one-side extended end-plate are helpful to enhance the flexural performance of steel frame beam-column connections with the gusset plate.