Transverse seismic isolation system of high-speed railway bridge based on train running safety

被引：0
|
作者：
Li X. [1 ]
Cheng M. [1 ]
Sun L. [1 ]
Xu X. [1 ]
Li Z. [1 ]
Zhang J. [1 ]
机构：
[1] College of Civil Engineering, Nanjing Tech University, Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 03期
关键词：
Anti-impact multi-direction energy-dissipating damper; High-speed railway bridge; Lateral acceleration of track; Seismic isolation system; Track deformation; Traffic safety;
D O I：
10.13465/j.cnki.jvs.2021.03.016
中图分类号：
学科分类号：
摘要：
Here, aiming at the most widely used 32 m-span high-speed railway simply supported girder bridge, considering transition segments of road and bridge and change places of pier height harmful to train running safety, the safety performance of high-speed railway bridge was evaluated and the feasibility of applying conventional seismic isolation schemes, such as, lead core rubber bearings and friction pendulum bearings in high-speed railway bridge was analyzed. The results showed that track deformation and track lateral acceleration of high-speed railway bridge with pot type rubber bearings are larger, they can't meet running safety requirements of high-speed trains; after taking conventional seismic isolation measures, the bridge seismic response is reduced, but running safety requirements of train can't be satisfied at transition segments of road and bridge. Therefore, the anti-impact multi-directional energy-dissipating damper was developed, using it combined with pot type bearing, a transverse seismic isolation system for high-speed railway bridge was proposed to meet requirements of train running safety. It was shown that under action of earthquake, the proposed system can bear a larger impact force at the moment of pot type bearing being cut off, ensure the stiffness of the bridge structure not having mutation in conversion process of the system, control track deformation not exceeding the allowable limit value, and ensure the running safety of trains. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：117 / 124
页数：7
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