Seismic Performance of a Sliding Isolation Bridge System with a New Spring Re-Centering Device

Pengcheng Yin, Jianguo Wang () and Yutao Pang
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Pengcheng Yin: China Railway Siyuan Survey and Design Group Co., Ltd., Heping Avenue 745, Wuhan 430074, China
Jianguo Wang: Department of Civil, Geological and Mining Engineering, Polytechnique Montréal, Montréal, QC H3C 3A7, Canada
Yutao Pang: Faculty of Engineering, China University of Geosciences, Lumo Road 388, Wuhan 430074, China

Sustainability, 2022, vol. 14, issue 17, 1-13

Abstract: Residual displacements between the girder and piers were observed in previous strong earthquakes. These are caused by the limited re-centering capacity of sliding isolation bearings. With this concern, a spring re-centering device is proposed to improve the re-centering capacity of sliding isolation systems. The working mechanism is illustrated, and the force–deformation relationship of this device was investigated in theoretical, experimental, and finite element methods. An extra-dosed multi-pylon cable-stayed bridge was introduced to demonstrate the re-centering effect. The results show that this spring re-centering device could slightly mitigate the seismic forces and significantly mitigate the residual displacement between the girder and piers. After that, the parametric analysis was conducted to investigate the effect of critical parameters of re-centering bearings on seismic performances.

Keywords: spring re-centering device; lateral stiffness of spring; sliding isolation system; relative and residual displacements; optimal design (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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