节点文献

双块式无砟轨道混凝土界面疲劳性能试验研究

Experimental Study on Fatigue Performance of Concrete Interface of Double-block Ballastless Track

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 王明昃蔡成标张嘉伟何庆烈曾东方罗信伟

【Author】 WANG Mingze;CAI Chengbiao;ZHANG Jiawei;HE Qinglie;ZENG Dongfang;LUO Xinwei;State Key Laboratory of Traction Power, Southwest Jiaotong University;Guangzhou Metro Design & Research Institute Co.,Ltd.;

【通讯作者】 何庆烈;

【机构】 西南交通大学牵引动力国家重点实验室广州地铁设计研究院股份有限公司

【摘要】 针对高速铁路双块式无砟轨道道床板-支承层层间界面损伤及疲劳破坏问题,制作了混凝土复合试件并开展界面疲劳开裂试验,研究了循环荷载下层间界面的力学性能演变规律。基于试验得到了界面张力-位移关系以及界面疲劳S-N曲线,并与相关文献对比验证了结果的合理性;同时,探明了界面张开位移、速率与幅值增长率随荷载循环次数的演变规律。结果表明:界面张开位移呈现出快速增长、稳定与不稳定增长三个阶段,张开位移幅值约为5~15μm时混凝土界面出现分离现象;界面疲劳破坏历程以第二阶段为主,可通过监测界面张开位移幅值预估界面疲劳剩余寿命,对无砟轨道安全服役提供参考。

【Abstract】 To address the interface fatigue damage of double-block ballastless track in high-speed railways, by making the composite specimens of the slab-supporting layer concrete(SSC) and designing the test program of the interface fatigue cracking, the mechanical performance evolution law of the adhesive interface of the SSC was investigated under cyclic load. Based on the tests, the interfacial tension force-displacement relationship and the S-N interfacial fatigue curve were acquired, and its rationality of the results was validated by comparing with relevant references. Meanwhile, the evolution law of the opening displacement, velocity and the growth rate of the opening amplitude at the interface varying with the load cycles were revealed. The results show that the development of the interface opening displacement presents a three-stage evolution rule including rapid growth, stable growth and unstable growth. The interface opening amplitude is 5-15 μm when the concrete interface is separated. The stable growth stage is the main stage during the fatigue deformation process, the proposed relationship at this stage between the load cycles and the opening velocity or the growth rate of the opening amplitude at the interface can be adopted to predict the entire evolution law and to predict the interface fatigue life.

【基金】 国家自然科学基金(11790283,51978587);牵引动力国家重点实验室自主研究课题(2019TPL-T16)
  • 【文献出处】 铁道学报 ,Journal of the China Railway Society , 编辑部邮箱 ,2021年04期
  • 【分类号】U213.244
  • 【被引频次】1
  • 【下载频次】346
节点文献中: 

本文链接的文献网络图示:

本文的引文网络