含耗能雀替的榫卯节点抗震性能试验研究

Mortise-tenon joint is a kind of semi-rigid joint, which has relatively weak bending resistance and is close to hinge joint in loading behavior. In order to improve the bearing capacity, stiffness and energy dissipation capacity of mortise-tenon joints. According to the mechanical characteristics of mortise-tenon joints, the QueTi dampers were designed. Then the low cyclic reversed loading tests and finite element simulations were performed on the QueTi damper with different proportions of top-level segment spacing, different thicknesses and different widths, and the hysteretic curves and skeleton curves were obtained. Additionally, finite element simulations were performed on 12 mortise-tenon joints strengthened with QueTi damper of different sizes, and the hysteretic curves, skeleton curves and energy dissipation curves were obtained. The results show that the QueTi damper has good energy dissipation characteristics under both compressive and tensile states, and has advantages such as two-way energy consumption, multiple point yielding, and parameterized design. Its stiffness, energy dissipation capacity and bearing capacity are positively correlated with the thickness and width of the energy absorber within a certain range, and negatively correlated with the top segment of the top layer. The energy dissipation capacity of mortise-tenon joints is positively correlated with the yielding of the energy absorber in QueTi damper after reinforcement. Particularly, the seismic performance of mortise-tenon joints is effectively strengthened with the increase of the thickness of inner energy absorber.