- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | HE Qing, ZHOU Siyuan, WAN Qiushi, GUO Hui, LING Liepeng, WANG Ping. Management and Monitoring Suggestions for Beam-end Integration Device in Long-span High-speed Railway Bridge Based on Data Analysis and Physical Modeling[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240272
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Beam-end integration devices in long-span high-speed railway bridges have complex structures and are prone to generating peak structural track irregularities, which directly affect train running stability. However, targeted monitoring and management criteria for such devices are currently lacking. In this study, monitoring management values for beam-end integration devices are investigated. Monitoring data collected in recent years are analyzed, and a finite element model of the beam-end integration device is established. Based on static irregularity standards, simulation analyses are conducted to propose monitoring management values for beam-end longitudinal displacement, lateral displacement, deflection angle, and fixed steel sleeper lifting and unsupported sleeper. For an operational speed of 250 km/h, the proposed Class Ⅰ monitoring management thresholds are as follows: beam-end longitudinal compression of 160 mm, lateral displacement of 7 mm, deflection angle of 3‰ rad, fixed steel sleeper lifting of 3 mm, and unsupported sleeper of 2 mm. The results show that the proposed monitoring management values can effectively identify abnormal conditions of the device. Longitudinal compression at the beam end significantly affects track profile and gauge irregularities; lateral displacement primarily influences gauge irregularity; both the fixed steel sleeper unsupported section and lifting impact track profile irregularity. The proposed monitoring management values provide a reference for the operation and maintenance of long-span high-speed railway bridges.
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