EXPERIMENTAL RESEARCH ON HYSTERETIC PROPERTIES OF INTERIOR BEAM-COLUMN JOINTS FOR PREFABRICATED CONCRETE FRAMES CAST BY STEEL FIBER CONCRETE

Based on the quasi-static test study of interion beam-column joints for prefabricated concrete frame cast by steel fiber concrete in site and interior beam-column joints cast by ordinary concrete in situ under the same condition, the failure characteristics, hysteretic curve, skeleton curve, stiffness degradation and bearing capacity degradation were analyzed. The results showed that, compared with that of the joints cast ordinary concrete in site, the bearing capacity and deformation capacity of the joints cast by steel fiber concrete in site were improved, the hysteretic performance was significantly improved, and the stiffness degradation of the joints was retarded and the bearing capacity reduction coefficient increased. The addition of steel fiber to the joints could improve the failure mode significantly, which could be conducive to the seismic resistance of the structure.