中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2018, Vol. 37 ›› Issue (04): 39-44.DOI: 10.3969/j.issn.1674-0696.2018.04.07

• 道路与铁道工程 • 上一篇    下一篇

变幅交变应变控制下沥青混合料应力响应

丁彪1,郑传超2,邹晓龙2,陈团结1,郑南翔2   

  1. (1.中交第一公路勘察设计研究院有限公司,陕西 西安 710065; 2.长安大学 教育部特殊地区公路工程重点实验室,陕西 西安 710064)
  • 收稿日期:2017-01-27 修回日期:2017-04-10 出版日期:2018-04-12 发布日期:2018-04-12
  • 作者简介:丁彪(1986—),男,江苏盐城人,博士,主要从事路基路面方向的研究。E-mail:db1051401313@sina.com。
  • 基金资助:
    陕西省自然科学基础研究计划—青年人才项目(2016JQ5115);中国交通建设股份有限公司科技研发项目(2015-ZJKJ-PTJS05)

Stress Response of Asphalt Mixture under Variable Amplitude Alternating Strain

DING Biao1,ZHENG Chuanchao2,ZOU Xiaolong2,CHEN Tuanjie1,ZHENG Nanxiang2   

  1. (1.CCCC First Highway Consultants Co.,Ltd.,Xi’an 710065,Shaanxi,P. R. China; 2.Key Laboratory of Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi’an 710064,Shaanxi,P. R. China)
  • Received:2017-01-27 Revised:2017-04-10 Online:2018-04-12 Published:2018-04-12

摘要: 借助于单位阶跃函数将分段的应变写成连续应变的形式,基于Burgers模型,求解出变幅交变应变控制条件下沥青混合料的应力解析解;同时,开展了沥青混合料变幅疲劳试验,并将解 析解与试验结果进行比较。结果发现:当加载顺序为先低后高时,沥青混合料在两阶段的应力都会随着荷载作用次数的增加而减小;而加载顺序为先高后低时,沥青混合料在低应变控制的初 始阶段会存在一个平衡应力,当卸载幅度过小时,低应变控制阶段的初始应力会高于平衡应力,应力会随着荷载作用次数的增加而减小,当卸载幅度过大时,低应变的控制阶段的初始应力会 低于平衡应力,应力随着荷载作用次数的增加先增大后减小。

关键词: 道路工程, 变幅, Heaviside函数, 沥青混合料, 平衡应力, 损伤

Abstract: With unit step function,piecewise strain was written as a continuous strain.Based on Burgers model,stress analytic solution under variable amplitude alternating strain was solved; meanwhile,the variable amplitude fatigue test of the asphalt mixture was conducted,and the results of the above two conditions were compared.The results show that under low-high load sequence,the stress of the asphalt mixture will decrease with the increase of load times in two load levels.Under high-low load sequence,there is an equilibrium stress at the initial stage of low strain control; when unloading level is too small,the initial stress at the low strain control stage will be higher than equilibrium stress and the stress will decrease with the increase of load times; while unloading level is too big,the initial stress at the low strain control stage will be lower than equilibrium stress and the stress will increase first and then decrease with the increase of load times.

Key words: highway engineering, amplitude, Heaviside function, asphalt mixture, equilibrium stress, damage

中图分类号: