- 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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| Citation: | CHEN Cheng, TANG Yuyan, TANG Zian, ZHANG Lei, YANG Chao. Bearing Characteristics of X-Shaped Sleeper Based on Scaled Test and Discrete Element Simulation[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230590
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To investigate the trackbed bearing capacity and lateral resistance characteristics of a new X-shaped sleeper, scaled tests comparing the stiffness and lateral resistance between X-shaped and Type Ⅲ sleepers were conducted. A 3D model of a ballast track was established by the discrete element method to analyze the vertical load transmission mechanism and lateral resistance of these two types of sleepers at a micro level. The results indicate that at the maximum vertical load, the X-shaped sleepers significantly reduce vertical displacement (stiffness) by approximately 26.3% compared to Type Ⅲ sleepers (an increase of about 46.6%). Furthermore, the ultimate lateral resistance of the X-shaped sleeper is increased by 22.4%, which effectively improves the lateral stability of the track. The X-shaped sleepers exhibit a substantial increase in the contact area and stress with ballast between the sleepers. The contact forces on the X-shaped sleeper are distributed over four angular segments, making the ballast between the sleepers fully participate in the load sharing. Because the structure of the X-shaped sleeper can increase the participation of the ballast between the sleepers, the stiffness and transverse resistance of the trackbed are increased by about 29.2% and 31.6%, respectively, which is close to the experimental conclusion.
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Figures(18) / Tables(3)
CHEN Cheng, TANG Yuyan, TANG Zian, ZHANG Lei, YANG Chao. Bearing Characteristics of X-Shaped Sleeper Based on Scaled Test and Discrete Element Simulation[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230590
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