Research on the Aging Shear Performance of Plate Rubber Bearings in Bridges Considering Frictional Slip in Marine Corrosion Environment

Plate rubber bearing is an important supporting member in the bridge structure system in the marine corrosion environment. The frictional slip and rubber aging will affect the overall seismic performance of the bridge structure. To investigate the aging shear performance of bridge plate rubber bearing considering frictional slip under the marine corrosion environment,the frictional slip test on the plate rubber bearing was carried out,and the effect of rubber aging on the shear performance and frictional slip of the plate rubber bearings with various shape factors was analyzed by the finite element method. The results show that:（1）The initial frictional slip of the bearing increases with the increase of aging time and the shape factor;（2）The energy consumed by the bearing through frictional slip gradually increases with the aging time;（3）The equivalent viscous damping ratio of the bearings increases with the aging time and the shape factor. Marine corrosion environment will accelerate the aging of the plate r