新型装配式地铁轨顶风道受力性能研究
李阳徐军林
Mechanical Behaviors of New Prefabricated Metro Track-top Air Duct
LI YangXU Junlin
-
作者信息:中铁第四勘察设计院集团有限公司， 430063， 武汉
-
Affiliation:China Railway Siyuan Survey and Design Group Corporation， 430063， Wuhan， China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.20252070
-
中图分类号/CLCN:U231.5
-
栏目/Col:土建工程
摘要:
［目的］ 传统地铁轨顶风道施工难度大、周期长、投资高，亟需解决这一难题。［方法］ 依托某地铁工程，研发一套预制的新型装配式轨顶风道方案；采用midas Gen有限元软件建立数值模型，并制作足尺试件，通过试验与有限元分析对其受力性能及破坏机理展开研究。［结果及结论］ 新型装配式轨顶风道竖向抗拔力极值为1 596.5 kN，水平抗侧向力极值为216.7 kN，远高于实际使用工况下受荷值，具有很高的安全储备性能，且与有限元计算结果呈相同破坏趋势：在水平加载时，裂缝多出现于轨顶风道侧墙与底板交接处，而连接部位未出现明显破坏，表明所提风道方案其连接方式合理可靠。研究结果表明，采用有限元分析可有效反映新型装配式轨顶风道在各类荷载条件下的受力特征。
Abstracts:
［Objective］ Traditional trackway duct construction in metro suffers from high construction difficulty， long construction cycles， and high investment， necessitating an urgent solution to this challenge. ［Method］ Based on a metro engineering project， a new prefabricated assembly scheme for trackway ducts was developed； the Midas Gen finite element software was used to establish a numerical model， and full-scale specimens were fabricated to study its mechanical behavior and failure mechanism through experimental and FEM analyses. ［Result Conclusion］ The new prefabricated track-top air duct demonstrates a maximum vertical pull-out force of 1596.5 kN and a horizonal lateral resistance force of 216.7 kN， both significantly higher than the loading values under actual service conditions， indicating a high safety margin. The failure trends observed in the experiments are consistent with the finite element analysis results： during horizontal loading， cracks mostly appear at the junction between air duct side walls and base slab， while no significant damage is observed at the connection parts， indicating that the connection method in the proposed air duct scheme is rational and reliable. The study results show that finite element analysis can effectively reflect the mechanical behaviors of the new prefabricated track-top air duct under various loading conditions.
- 上一篇: 偏心开洞条件下机械法联络通道抗震性能研究
- 下一篇: 地铁小半径曲线段非对称轨底坡对钢轨波磨的影响
过刊浏览
资料下载
友情链接