无砟轨道下沥青混凝土层与支承层层间关系研究*

doi:10.16265/j.cnki.issn1003-3033.2019.S1.023

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (S1): 126-133.doi: 10.16265/j.cnki.issn1003-3033.2019.S1.023

无砟轨道下沥青混凝土层与支承层层间关系研究^*

吕宋^1,2,3, 肖宏² 教授, 蔡德钩^1,3 研究员

1 中国铁道科学研究院集团有限公司高速铁路轨道技术国家重点实验室,北京 100081;
2 北京交通大学土木建筑工程学院,北京 100044;
3 中国铁道科学研究院集团有限公司铁道建筑研究所,北京 100081

收稿日期:2019-04-10 修回日期:2019-06-10 出版日期:2019-06-30 发布日期:2020-10-28
作者简介:吕宋 (1992—),男,内蒙古巴彦淖尔人,硕士研究生,研究方向为轨道工程。E-mail: lvsongok@126.com。
基金资助:
国家重点研发计划课题(2016YFB1200402);高速铁路轨道技术国家重点实验室开放基金课题(2017YJ166)。

Research on interlayer relationship between asphalt concrete layer and support layer under ballastless track

LYU Song^1,2,3, XIAO Hong², CAI Degou^1,3

1 State Key Laboratory for Track Technology of High Speed Railway, China Academy of Railway Sciences Group Co. Ltd., Beijing 100081, China;
2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
3 Railway Engineering Research Institute, China Academy of Railway Sciences Group Co. Ltd., Beijing 100081, China

Received:2019-04-10 Revised:2019-06-10 Online:2019-06-30 Published:2020-10-28

摘要/Abstract

摘要： 为研究温度荷载下全断面铺设沥青混凝土层与无砟轨道支承层之间的层间关系及破坏过程,首先采用基于表面的黏聚力模型(CZM)描述沥青混凝土层与支承层的层间关系,分析不同温度、不同支承层长度下二者的层间相互作用;然后分析低温条件降温工况(最不利工况)下,沥青混凝土层与支承层的层间破坏全过程。结果表明:沥青混凝土层与支承层层间剪应力在端部最大,向内逐渐减小;最不利工况下沥青混凝土层与支承层的层间剪应力最大;支承层长度的增加使其与沥青混凝土层的层间剪应力增大,发生层间破坏的可能性增大;沥青混凝土层与支承层的层间损伤及破坏先从板端位置开始,随着温度降低,破坏范围逐渐向内扩展。

关键词: 沥青混凝土层, 支承层, 黏聚力模型(CZM), 剪切强度

Abstract: In order to study the interlayer relationship and failure process between the full-section asphalt concrete layer and the support layer of ballastless track under temperature load, a numerical model is established for analysis. The surface-based CZM was used to describe the interlayer relationship between asphalt concrete layer and support layer. The interactions of different temperature and different support layer lengths were analyzed. Then, the interlayer damage of asphalt concrete layerand support layerwas analyzed throughout the process by choosing the most unfavorable working condition. The results show that the shear stress between the asphalt concrete layer and the support layer is the largest at the end and gradually decreases inward.The interlayer shear stress is the largest under the condition of low temperature and cooling, which is the most unfavorable condition.The increase of the length of support layer increases the interlayer shear stress and the possibility of interlayer damage. The interlayer damage of the asphalt concrete layer and the support layer starts from the position at the end of the plate, and the damage range gradually expands inward as the temperature decreases.

Key words: asphalt concrete layer, support layer, cohesive zone model(CZM), shear strength

中图分类号:

X935

吕宋, 肖宏, 蔡德钩. 无砟轨道下沥青混凝土层与支承层层间关系研究^*[J]. 中国安全科学学报, 2019, 29(S1): 126-133.

LYU Song, XIAO Hong, CAI Degou. Research on interlayer relationship between asphalt concrete layer and support layer under ballastless track[J]. China Safety Science Journal, 2019, 29(S1): 126-133.

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无砟轨道下沥青混凝土层与支承层层间关系研究^*

Research on interlayer relationship between asphalt concrete layer and support layer under ballastless track

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