Seismic sliding isolation works by installing a sliding layer between the superstructure and the foundation, limiting the seismic forces transmitted to the superstructure to a constant, controlled level, thereby protecting the structure

Compared to the superstructure, seismic isolation layers typically have lower horizontal stiffness. While wind resistance is generally manageable for upper floors due to their high rigidity, seismic isolation structures require special attention because isolation bearings exhibit low horizontal stiffness and yield strength.

PTFE sliding rubber bearings—incorporates a polytetrafluoroethylene (PTFE) layer to reduce friction, significantly altering their performance characteristics. Investigating the effects of natural corrosion on the mechanical properties of PTFE sliding rubber bearings holds critical engineering relevance.

Bridge seismic isolation bearings must meet the following core criteria: basic performance requirements, system reliability, and structural design specifications.