SEISMIC PERFORMANCE ANALYSIS OF NOVEL PRECAST CONCRETE BEAM-COLUMN JOINT WITH REPLACEABLE ENERGY DISSIPATION DEVICES

This paper proposes a novel prefabricated concrete beam-column joint with replaceable energy dissipation devices, which mainly consists of weakened upper and lower steel plates and perforated weakened H-shaped steel plates. A specimen with replaceable energy dissipation devices and a cast-in-place integrated specimen were designed and subjected to cyclic loading at the beam end to investigate the hysteretic response, longitudinal bar strain, ultimate bearing capacity, energy dissipation capacity, residual deformation and post-earthquake recoverability of the joint. The test results show that the specimen with replaceable energy dissipation devices can transfer the plastic zone from the core part of the beam-column to the energy dissipation device to realize energy dissipation. When the energy dissipation device yields and fails, the beam-column is still in elastic state. Compared with the cast-in-place specimen, the energy dissipation capacity of the joint with replaceable energy dissipation devices is 20% higher, indicating good energy dissipation and post-earthquake recoverability performance.