- 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: | LIU Xiaokai, LIU Xueyi, XIAO Jieling, DONG Jiajia. Analysis of Internal forces and Damage of Broad-Narrow Joint of CRTSⅡ Slab Track Under Temperature Rise[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 273-280. doi: 10.3969/j.issn.0258-2724.20210946
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In order to study the internal forces and the damage of broad-narrow joint under a temperature rise, a detailed finite element model with the interface between old and new concrete is established on the basis of concrete damaged plasticity model and cohesive zone model. The damage parameters and stress under different temperature rises are calculated, and the effects of the concrete strength at broad-narrow joint and the narrow joint width are analyzed. The results show that the fracture at the junction between broad and narrow joints is a brittle tension failure, and the breakage of narrow joint is a gradual compression failure. Compared with the fracture at the junction between broad and narrow joints, the breakage of narrow joint has a greater impact on the structural stress. The vertical tension stress arising from the uneven geometry at the junction between broad and narrow joints is the main cause for the damaged broad-narrow joint. Increasing the broad-narrow joint strength reduces the longitudinal compression stress and the compression damage, but contribute less to the vertical tension stress and the tension damage. To reduce damage and improve strength, it is recommended to equate the widths for the broad and narrow joints and the strengths for the concrete at the broad-narrow joint and the slab.
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Figures(14) / Tables(2)
LIU Xiaokai, LIU Xueyi, XIAO Jieling, DONG Jiajia. Analysis of Internal forces and Damage of Broad-Narrow Joint of CRTSⅡ Slab Track Under Temperature Rise[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 273-280. doi: 10.3969/j.issn.0258-2724.20210946
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