Abstract
This paper investigates an experimental study on CFST (concrete-filled steel tubular) column to H-shaped steel beam joints with outer annular stiffener. Five joint specimens (three T-shaped joints and two cruciform joints) were carried out under cyclic loading tests. The main experimental parameters included column width-thickness ratio (D/t = 30 or 38), and axial load ratio (n = 0.4 or 0.6). The strength, stiffness, ductility, and energy dissipation capacity were compared and analyzed based on the experimental results. The results showed that small column width-thickness ratio could effectively improve the elastic stiffness and ultimate bearing capacity of tested specimens. Two failure modes, column local buckling of T-shaped joint and beam weld cracking of cruciform joint, were observed during the test.
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