Abstract:

The experiments of five scaled specimens with a novel interior slab-CFST (Concrete-Filled Steel Tubu-lar)column connection were carried out under low cyclic loading.The efects of different reinforcement arrange-ments on the failure mode,the anti-seismic behaviors including the hysteresis property and the ductility were then analyzed and evaluated.Test results show that the novel connection is of excellent performance under low cyclic loading,and that the construction form meets the anti-seismic design principles of strong column and weak slab.Moreover,reinforced stirrups in slab strips on the column can efectively improve the anti-seismic behavior of the connection,and,no matter whether the slab strips are reinforced with stirrups,the plastic deform ation capacity and anti-seismic behavior of the connection with flexural failure are all better than those of the connection with punching failure.

Key words: concrete-filled steel tubular column, slab, interior connection, anti-seismic behavior, quasi-static ex-periment