Seismic vulnerability analysis of small and medium span girder bridges

被引：0
|
作者：
Song S. [1 ]
Wang S. [1 ]
Wu G. [2 ]
Xu B. [3 ]
机构：
[1] School of Civil Engineering, Taiyuan University of Technology, Taiyuan
[2] School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang
[3] Transportation Institute, Inner Mongolia University, Hohhot
来源：
| 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Bridge components; Bridge system; Copula function; Seismic vulnerability; Series-parallel system;
D O I：
10.13465/j.cnki.jvs.2020.09.016
中图分类号：
学科分类号：
摘要：
In order to accurately evaluate the seismic vulnerability of bridge systems, a new vulnerability analysis method of the bridge system based on series-parallel system and Copula function technology is proposed. The pier is a control component in the bridge and is difficult to be repaired after earthquakes. Bridge piers are combined by a series system. For bridge abutments and bearings which are less difficult to be repaired, a parallel system is used to simulate them. The three types of component classes are then connected in the series form, and a series-parallel system of the bridge system is developed. A three-span continuous box girder bridge is used to illustrate the seismic vulnerability analysis method of bridge systems based on the series-parallel system. The results are compared with the system vulnerability based on the series system. The results show that the vulnerability of the small and medium span continuous bridge system is significantly overestimated based on a simple series system. Compared with the series-parallel system, deviations of the vulnerability medians in the longitudinal direction are 22.2%, 20.7%, 20.5% and 24.6% for slight, medium, severe and complete limit states, respectively. The deviations in the transverse direction are respectively 30.0%, 16.1%, 9.8% and 11.3% for the four limit states. The seismic vulnerability of the bridge system based on the series-parallel system is more realistic and reasonable. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：118 / 125
页数：7
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