Seismic Fragility Analysis of Rigid Frame Bridge Near-fault High-speed Railway
[1]LIANG Yan,YAN Shichang,ZHAO Boyang,et al.Seismic Fragility Analysis of Rigid Frame Bridge Near-fault High-speed Railway[J].Journal of Zhengzhou University (Engineering Science),2022,43(04):80-85.[doi:10.13705/j.issn.1671-6833.2022.04.022]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43卷
Number of periods:
2022 04
Page number:
80-85
Column:
Public date:
2022-07-03
- Title:
- Seismic Fragility Analysis of Rigid Frame Bridge Near-fault High-speed Railway
- CLC:
- U238
- DOI:
- 10.13705/j.issn.1671-6833.2022.04.022
- Abstract:
- To study seismic response of high-speed railway bridge under near-fault earthquake,this study took a high-speed railway rigid frame bridge as the sample of study,the whole bridge model was established by OpenSees and seismic fragility curves were established by reliability theory,bridge fragility under near-fault and far-field earthquakes were compared and analyzed.The influence of near-fault ground motion velocity pulse effect on seismic response of bridge structure was studied.The results showed that under the action of a near-fault earthquake with velocity impulse,the fragility of bridge members and systems in each damage state was significantly higher than that of far-field seismic motion.The fragility of bridge systems in near-fault and far-field seismic action was higher than that of a single component.The seismic fragility evaluation system using a single component could overestimate the seismic performance of the bridge.Compared with the first-order boundary method,the second-order boundary method took into account the correlation between bridge members.The upper and lower bounds of the fragility curves were smaller and the seismic fragility of the bridge was more accurate.In rare earthquakes,the system′s fragility under near-fault earthquakes increased by percent point of 3,13,23,3,respectively,compared with that under far-field earthquake.The influence of velocity pulse effect on seismic response of bridge structure should be considered in the evaluation of the seismic performance of bridge structure near fault area.
- References:
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Last Update:
2022-07-03