Seismic Isolation Performance of Bridges in Deep-water Considering the Spatial Variability of Ground Motions

被引：0
|
作者：
Yuan W. [1 ]
Lin Z. [1 ]
Dang X. [1 ]
Jia L. [1 ]
机构：
[1] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
来源：
Tongji Daxue Xuebao | / 5卷 / 625-632期
关键词：
Bridges in deep water; Earthquake; Hydrodynamic pressure; The cable-sliding friction aseismic bearing; The spatial variability of ground motions;
D O I：
10.11908/j.issn.0253-374x.2017.05.002
中图分类号：
学科分类号：
摘要：
A cable seismic isolation system was proposed for long span continuous girder bridges in deep water. A method was presented for obataining the ground motion acceleration of different excitation points which based on the recorded ground motion arrays itself considering the spatial variability at the same time. Compared with the conventional system and the feeble fixed system, the seismic isolation effectivity of cable seisimc isolation system was studied when the spatial variability of ground motions was considered, and the effect of earthquake induced hydrodynamic pressure on the seismic response of deep-water bridges was discussed. The results indicate that the deep-water continuous girder bridges with cable-sliding friction aseismic bearing have remarkable isolation performance, and this bearing is sensitive to the spatially varying earthquake ground motions including wave-passage, incoherence and site-response effect. The effect of hydrodynamic pressure on the seismic response of bridges in deep water is different, considering the spatial variability of ground motions relative to a uniform excitation, which is also changed with apparent wave velocity, incoherence coefficient, local site condition when wave-passage, incoherence and site-reponse effect are considered. © 2017, Editorial Department of Journal of Tongji University. All right reserved.
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页码：625 / 632
页数：7
相关论文
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