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Structural Monitoring and Maintenance
  Volume 8, Number 3, September 2021, pages 295-308
DOI: https://doi.org/10.12989/smm.2021.8.3.295
 
open access

The seismic responses of girder bridges with novel sliding lead rubber bearings
Yi-feng Wu, Ai-qun Li and Hao Wang

 
Abstract
    Based on the commonly used lead rubber bearing (LRB) and sliding rubber bearing (SRB), a novel sliding lead rubber bearing (SLRB) is introduced. The mechanical properties of the three types of bearings were investigated by experiment. After that, a simply supported girder bridge with a 1/4 scale ratio was designed and fabricated, and the dynamic characteristics and seismic response of the bridge equipped with the above three types of bearings were studied. Results show that the girder's acceleration response has been effectively reduced by setting bearings only for relatively high earthquake intensity. Compared with LRB and SRB, SLRB works with more compositive seismic isolation effect. The "slide" action of the telflon-stainless-steel interface in SLRB can significantly reduce the acceleration response of girder, while the relative displacement between the pier and girder for this novel bearing is not increased due to the occurrence of collision in the bearing.
 
Key Words
    girder bridge; seismic isolated; shaking table test slide and collision; sliding lead rubber bearing
 
Address
(1) Yi-feng Wu, Ai-qun Li:
School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China;
(2) Ai-qun Li, Hao Wang:
School of Civil Engineering, Southeast University, Nanjing, 210096, China.
 

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