Shaking Table Tests of Curved Bridge considering Bearing Friction Sliding IsolationReport as inadecuate




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Shock and Vibration - Volume 2016 2016, Article ID 6245062, 14 pages -

Research Article

School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, China

School of Civil Engineering, Xinxiang University, Xinxiang, Henan 453000, China

Received 27 March 2016; Revised 1 June 2016; Accepted 11 July 2016

Academic Editor: Mahmoud Bayat

Copyright © 2016 Lei Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Specific to severe damage to curved bridges in earthquakes caused by the excessive force of the fixed bearings and piers, a new seismic design method on curved bridges considering bearing friction sliding isolation is proposed in this paper. Seismic model bridge and isolation model bridge with similarity ratio of 1-20 were made and the shaking table comparison test was conducted. The experimental results show that the isolation model curved bridge suffered less seismic damage than the seismic model curved bridge. The fundamental frequencies of the seismic model bridge and isolation model bridge decreased and the damping ratio increased with the increase of seismic intensity. Compared with seismic curved bridge, the maximum reduction rates of peak acceleration along the radial and tangential directions on the top of pier of the isolation model curved bridge were 47.3% and 55.5%, respectively, and the maximum reduction rate of the peak strain on the bottom of pier of the isolation model curved bridge was 43.4%. For the isolation model curved bridge, the maximum reduction rate of peak acceleration on the top of pier was 24.6% compared with that on the bottom of pier. The study results can provide experimental basis for the seismic design of curved bridges.





Author: Lei Yan, Qingning Li, Chun Han, and Haotian Jiang

Source: https://www.hindawi.com/



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