Evaluation and Research on the Load-Bearing Performance of Railroad Steel Plate Girder Bridges Under Long-Term Service

DOI

10.2991/978-94-6463-688-8_16How to use a DOI?

Keywords

Long-term service; Steel plate girder bridge; Dynamic and static load testing; Dynamic performance; Finite element analysis

Abstract

To objectively evaluate the dynamic and static load performance of a railroad bridge that has been in service for nearly seventy years, a steel plate girder bridge along a railroad line in China is used as a case study to conduct on-site static load tests and dynamic load tests under 5 km/h, 10 km/h, 15 km/h, 20 km/h, and 25 km/h working conditions. Compare the finite element model and theoretical calculation values. Then, analyze the flange plate stress, mid-span deflection, transverse and vertical maximum acceleration, and transverse and vertical maximum amplitude of the steel girder bridge at each measurement point. The results show that: 1) the finite element calculation model can better analyze the actual mechanical behavior of the bridge structure; due to the long-term service of the bridge structure, the performance of the steel structure decreases, resulting in an increase in the stress of the upper edge of the left and right-wing plates, and the ratio of the measured upper flange strains of the right and the left rafters of the span 1 is 1.217. The mid-span deflection calibration coefficient of the bridge is 0.76. The bridge structure is in good working condition, and the load-carrying performance is close to the design value under the static load. 2) the bridge structure is in good working condition, and the load-carrying performance is close to the design value. The difference in transverse acceleration at each control point is small. The performance of the span is relatively similar. The structural integrity of the superstructure is better. The amplitude of the vertical amplitude of the girder in the span under the maximum condition of 25 km/h is directly proportional to the speed of the traveling vehicle. In the experimental condition, the transverse amplitude of girders and pier tops is the largest in the 25 km/h condition, and there is no abnormality in the structural integrity of the bridge superstructure in the test range of span 1 and 2. The vertical amplitude difference between two adjacent span in span 4 is larger than the rest of the span. 3) The impact coefficient values of the measurement points in holes 1 and 2 are close to each other, and both reach the maximum under the working condition of 15 km/h. The results of this study can provide a reference for the maintenance and performance evaluation of bridges in long-term service.

Copyright

© 2025 The Author(s)

Open Access

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TY  - CONF
AU  - Yi-Zheng Jiang
AU  - Ming-Yang Yi
PY  - 2025
DA  - 2025/04/30
TI  - Evaluation and Research on the Load-Bearing Performance of Railroad Steel Plate Girder Bridges Under Long-Term Service
BT  - Proceedings of the 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)
PB  - Atlantis Press
SP  - 144
EP  - 152
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-688-8_16
DO  - 10.2991/978-94-6463-688-8_16
ID  - Jiang2025
ER  -