In order to study earthquake resistance behavior of top and seat angle joint of special-shaped concrete-filled rectangular composite tubular column with steel beam,the low cyclic loading experiment and ANSYS nonlinear finite element analysis on the joints were conducted.The results indicated that the destruction of joints derives from buckling of steel beam flange and yielding of top and seat angle steel,then plastic hinges are formed and a large rotation deformation is generated.The shapes of hysteresis curves of all specimens are full and present inverted “S”,the displacement ductility factors are greater than 2.55,and the energy dissipation capacities of all specimens are good.There is a great influence of top and seat angle thickness and high-strength bolt diameter on the bearing capacity of joints.If the thickness of top and seat angle and the diameter of high-strength bolt are increased,the displacement ductility factors of joints are decreased slightly,but ultimate bearing capacities are obviously enhanced.The stress distributions and the finite element failure characteristics of joints are basically consistent with the test phenomena,and yield bearing capacity and ultimate bearing capacity of the finite element calculations agree well with the experimental results;there is little effect of axial compression ratio on the earthquake resistance behavior of joint.Compared with high-strength bolt,there is a more significant influence of top and seat angle on the stiffness and bearing capacity of joint.
