Research On Horizontal Performance And Shock Absorption Of Isolation Bearing Assembled From Ring-shaped Steel Wire Shock Absorber And Spherical Bearing

The occurrence of earthquakes is uncertain.Many destructive large earthquakes occurred in low-intensity areas,and at the same time,due to the low design standards,the damage on structure is severe.Bridges are important transportation facilities.There are some meaningful studies on bridge isolation bearings and shock absorbers,but these devices are more or less flawed.Based on this,tthe horizontal shear performance and shock absorption effect of the isolation bearing assembled from ring-shaped steel wire shock absorber-spherical bearing are proposed.The main research contents are as follows:1.Based on the test results of the horizontal shear performance of the ring-shaped steel wire shock absorber,a three-line shear force model and its parameter regression calculation formula are given.At the same time,a one-dimensional nonlinear exponential model is used to fit the hysteresis curve of the ring-shaped steel wire shock absorber.It is verified that the model agrees well with the test curve under the condition of large displacement.2.The ANSYS finite element software is used to simulate the horizontal shear deformation performance of the ring-shaped steel wire shock absorber.The horizontal shear equivalent constitutive relationship is obtained through a large number of trial calculations.The validity of the constitutive relationship was verified by multiple test results..3.The design of vibrating table test on model bridge using isolation bearing assembled from ring-shaped steel wire shock absorber-spherical bearing and finite element simulation on the seismic response of the test model are completed.The results show that the use of isolation bearing assembled from ring-shaped steel wire shock absorber-spherical bearing can greatly reduce the displacement,the bending moment and the shearing force of the bridge piers.