EXPERIMENTAL STUDY ON ASEISMIC PERFORMANCE OF FRAME CONSTRUCTED BY RECYCLED-CONCRETE-FILLED-SQUARESTEEL-TUBE COLUMNS AND BEAMS

By a low cycle reveres test for the specimen of a frame constructed by recycled aggregate replacement percentage 100% recycled concrete filled-square steel tube columns and reinforced recycled concrete beams, the mechanical behavior and failure mode were revealed, and the hysteretic curve, skeleton curve, ductility, dissipation capacity and stiffness degeneration were obtained. The test results indicate that: the aseismic performance index of the RCFSST-RRCB frame can meet the Chinese aseismic code requirements; its hysteretic curve likes a full fusiform and has a symmetrical shape; the displacement ductility factor is near three; the ultimate rotation can reach 1/30; and the equivalent viscous damping coefficient at failure point is 0.216.