Abstract:The connections of cross-laminated timber (CLT) walls make up most of the lateral resisting mechanism and play a crucial role in the ductility and energy dissipation of the CLT wall system. An annular dissipative connector formed by U-shaped dampers was proposed to connect the CLT wall and the steel beam foundation. The aim was to shift the damage of the wall to the energy-consuming components to dissipate the seismic energy and protect the CLT wall. And the bearing load can be predicted easier, and the connections can be replaced after damage. Static shear cyclic tests were performed on seven annular dissipative connectors to investigate the main shear performance such as hysteretic curves, failure mechanisms, bearing capacities, stiffness degradation, and energy dissipation were studied. The effects of different widths and thicknesses of steel plates on the shear properties of the connections were compared. The shear bearing capacity of the anchored steel-CLT end with screws was theoretically estimated mainly based on Eurocode 5, and the calculation formula of the main mechanical parameters of the annular dissipative connectors was proposed. And the numerical simulation of energy-consuming nodes’ shear performance was carried out based on the finite element Abaqus software. The results showed that based on the experimental research, the proposed calculation formula for shear resistance of the CLT anchorage end, the calculation formula for the mechanical index of the annular Q235 damper, and the finite element analysis carried out could provide a basis for the design of dissipative connectors of CLT wall. Except for specimen D8-S86, the connections shifted the damage of wood to the energy-dissipating components. The calculation formula of the main mechanical performance index of the annular damper could accurately predict the yield force, initial stiffness, and yield displacement of the dissipative connectors. The established finite element model could predict the shear behavior of the dissipative connectors. An excellent dissipative connector (specimen D8-S55) for shear direction in load capacity and energy-dissipating capacity was presented after a series of analyses. The study can provide technical support for the engineering application of CLT structures in seismic areas.