Study on the Performance of Elliptical Negative Poisson’s Ratio Structural Isolation Bearing

The negative Poisson’s ratio structure has special deformation behavior and energy absorption characteristics and is a new structure with broad application prospects. However, most of the current research is still at the theoretical level, while research on its practical performance is sparse. Therefore, this paper proposes an elliptical negative Poisson’s ratio structural isolation bearing (NRB) for application in the field of seismic isolation engineering. The finite element simulation method is used to conduct a mechanical comparison with the traditional high damping isolation bearing (HDR), highlighting the advantages of the NRB in isolation and energy absorption. At the same time, parameter analysis is used to study the influence of the number and angle of structural holes on the stress of the NRB structure, which is 80% higher than that of the traditional isolation bearing, and incremental dynamic analysis (IDA) is also used. The overall average damage rate decreased by 70.3%, showing significant advantages in seismic energy dissipation, control of component damage, and other aspects, providing a strong data basis for the application of seismic isolation technology in practical engineering.