EXPERIMENTAL INVESTIGATION ON JOINTS CONNECTING OUTER-PLATED STEEL-CONCRETE COMPOSITE BEAM AND CONCRETE FILLED STEEL TUBE COLUMN

Based on the research of a outer-plated steel-concrete composite beam, the low-cycle repeated load tests are conducted for two joints connecting a outer-plated steel-concrete composite beam and a concrete filled steel tube column, and the performance of the joints such as the failure modes, hysteretic curves, strength, ductility, and strains of the steel bars, the steel plates and the steel tube are analyzed. The result of the experiment indicates that significant shear-resistant capacity and satisfactory energy dissipation ability can be obtained by an appropriate constructional measure so as to satisfy the engineering requirement. Based on the analysis of test, the force mechanism of joint is investigated and the formula for calculating the shear capacity of the joint is presented, the finite element analysis about the two joints are conducted based on the finite element analysis software-ANSYS.