- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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- Chinese Science Citation Database
| Citation: | LI Xiaozhen, ZHANG Jingyuan, HUANG Wentai, WANG Ming. Research on Completed Bridge Alignment Control Technology of Continuous Steel Truss Railway Girder Bridge Based on Driving Performance[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240654
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In order to meet the requirements for driving performance of railway bridges, it is necessary to control the smoothness of the bridge alignment. Based on the analysis of driving stability, the sensitive wavelength range of the vehicle body was determined. The amplitude of the completed bridge alignment within the range was adopted as the evaluation criterion. From the perspective of ensuring driving performance, by considering the self-adjustment capability of ballastless tracks and the relationship between the track surface alignment and the completed bridge alignment, the expression of the irregularity limit value for the completed bridge alignment was derived. A seven-span continuous steel truss girder bridge was taken as the research object. The irregularity amplitude of the completed bridge alignment within the sensitive wavelength range of the vehicle body was controlled according to the derived expression. A method for controlling the smoothness of the girder assembly alignment based on the target alignment of the completed bridge was proposed by combining Akima spline curve with the girder assembly curve. The research results show that the sensitive wavelength of the vehicle body is less than 200 m at driving speeds of trains ranging from 250 km/h to 350 km/h. If a seven-span continuous steel truss girder bridge is taken as an example, the irregularity limit values for the completed bridge alignment within the sensitive wavelength ranges of the vehicle body corresponding to speeds of 350 km/h, 300 km/h, and 250 km/h are 24 mm, 26 mm, and 29 mm, respectively. The irregularity amplitude within a 0–200 m wavelength range of the girder assembly alignment can be evaluated and controlled through the proposed method for controlling the smoothness of the girder assembly alignment.
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