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Abstract

To investigate the effect of wear of wear plates of friction pendulum bearings on the seismic performance of long-span continuous girder bridges, this paper conducted a rapid sliding performance test of friction pendulum bearings to study the wear degree of modified polytetrafluoroethylene wear plates in the rapid performance test. Meanwhile, by taking the 6 × 110 m long-span continuous girder bridge as the engineering background, a spatial three-dimensional finite element model was built to compare and analyze the seismic response of the bridge structure under different wear degrees of friction pendulum bearings. The results indicate that the modified polytetrafluoroethylene wear plates inside the friction pendulum bearings suffer severe wear during the rapid performance test, with the friction coefficient first increasing to 0.09 and then decreasing to 0.016. The sliding displacement of the bearing reaches its maximum and collides rigidly with the limit block. Additionally, the wear of wear plates leads to an increase in internal forces in key sections of the bridge, causing plastic deformation at the bottom of the pier and affecting the seismic performance of the bridge structure.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.026

First Page

145

Last Page

150

Submission Date

April 2025

Reference

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