含内嵌卯口耗能器的榫卯节点抗震性能试验研究

In response to the needs of seismic reinforcement and performance improvement of the mortise-tenon joints in wood structure buildings, this paper proposed the use of embedded dampers to enhance the performance of the mortise-tenon joints and made five groups of scaled mortise-tenon joint models including unreinforced, single-layer reinforced and double-layer reinforced embedded dampers. Through the test research of seismic performance, the seismic performance of the mortise-tenon joints with different thickness and number of layers was compared with that of the joints without reinforcement, and the seismic performance of embedded dampers with different parameters on the joints of mortise-tenon were analyzed. The results show that the embedded dampers have the characteristics of two-way energy dissipation, multi-point yielding and strong designability, which can greatly improve the seismic performance of the mortise-tenon joints and effectively suppress the tenon pulling phenomenon of joints; compared with the unreinforced joint, the embedded dampers-enhanced joints has a small increase in bearing capacity, the energy consumption capacity has been greatly improved and the initial stiffness has been greatly improved by more than 50 times; the steel plate thickness and the number of layers of the embedded dampers are the main factors affecting the seismic performance of the mortise-tenon joints, and the thickness has the greatest impact on the mechanical properties of the mortise-tenon joints strengthened by the embedded dampers; the double-layer embedded dampers is more effective than the single-layer energy dissipater.