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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第13卷    第1期    总第70期    2016年1月

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文章编号:1672-7029(2016)01-0009-06
型板式轨道宽接缝开裂对轨道受力的影响分析
赵林,刘学毅,赵华卫,董佳佳

(西南交通大学高速铁路线路工程教育部重点实验室,四川成都 610031)

摘 要: 为分析CRTSⅡ型板式无砟轨道宽接缝开裂对轨道受力性能的影响,以桥上Ⅱ型板式轨道为例建立计算模型,应用有限元法,计算分析在不同荷载作用下宽接缝的开裂对Ⅱ型板式轨道受力性能的影响。研究结果表明,整体降温条件下开裂对轨道结构的受力影响最大,正温度梯度增加了轨道板的最大翘曲位移;宽接缝开裂深度对轨道受力影响最为明显,当开裂深度达到200 mm时,底座板所受拉应力达到3.05 MPa;提出了Ⅱ型板式无砟轨道宽接缝开裂的修补标准建议值。

 

关键字: CRTSⅡ型板式轨道;宽接缝;温度荷载;维修标准

The study of influence on track stress caused by the cracking at wide juncture of CRTSⅡ prefabricated slab track
ZHAO Lin,LIU Xueyi,ZHAO Huawei,DONG Jiajia

MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract:In order to analyze the influence of the cracking at wide juncture of CRTSⅡprefabricated slab track on slab track,the numerical model is setup. Through finite element method, different loads influence on slab track is calculated and analyzed. The result shows that the overall cooling has the largest influence on track structure stress and the positive temperature gradient increases the maximum warping displacement of track slab; the effect of the depth of cracking at wide juncture on track stress is the most obvious, and the tensile stress of bed slab will reach 3.05 MPa and the crack depth is 200 mm; the suggested value of maintenance standard for wide juncture cracking of CRTSⅡ prefabricated slab track has been provided.

 

Key words: CRTSⅡ prefabricated slab track; wide juncture; temperature load; maintenance standards

ISSN 1672-7029
CN 43-1423/U

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