- 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: | LI Peigang, LAN Caihao, WEI Qiang, LI Junqi, LIU Zengjie, YANG Yongming. Calibration Method of Bi-block Ballastless Track Monitoring on Sleeper Pressure[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1385-1393. doi: 10.3969/j.issn.0258-2724.20211094
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In order to explore the long-term monitoring method of bi-block ballastless track sleeper pressure, this paper took the CRTSⅠ bi-block sleeper as the research object and studied the linear relationship between the internal strain values and the sleeper pressure by using the embedded fiber Bragg grating sensor. Firstly, the fiber reinforced polymer-optical fiber (FRP-OF) strain sensor was embedded in the sleeper at the manufacturing stage. Secondly, the sleeper was calibrated under static load by the reaction rack and jack, and the linear relationship between the surface loading force and the internal strain of the sleeper was analyzed. Finally, the finite element simulation was used for verification and correction. The results show that the load applied on the sleeper surface has a good linear relationship with the measured value of the FRP-OF strain sensor inside the sleeper. The slope of this linearity is determined as the calibration coefficient, with a range of about 4.90–5.28 kN/μ
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