兰州理工大学学报

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (6): 138-144.

• 建筑科学 • 上一篇    下一篇

基于灰熵理论的沥青混合料层间抗剪切疲劳影响因素探讨

郑万鹏1, 念腾飞*1,2, 王国伟1, 魏智强2, 刘宗成2, 刘文科2   

  1. 1.甘肃路桥善建科技有限公司, 甘肃 兰州 730300;
    2.兰州理工大学 土木工程学院, 甘肃 兰州 730050
  • 收稿日期:2022-06-28 出版日期:2023-12-28 发布日期:2024-01-05
  • 通讯作者: 念腾飞(1989-),男,陕西大荔人,博士,副教授.Email:tengfeinian@lut.edu.cn
  • 基金资助:
    国家自然科学基金(52368066),甘肃省自然科学基金(23JRRA773),甘肃省高等学校创新基金(2022A-026)

Discussion on the factors influencing interlayer anti-shear fatigue in asphalt mixture based on gray entropy theory

ZHENG Wan-peng1, NIAN Teng-fei1,2, WANG Guo-wei1, WEI Zhi-qiang2, LIU Zong-cheng2, LIU Wen-ke2   

  1. 1. Gansu Luqiao Shanjian Technology Co. Ltd., Lanzhou 730300, China;
    2. School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China
  • Received:2022-06-28 Online:2023-12-28 Published:2024-01-05

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摘要： 为探明沥青路面层间抗剪切疲劳寿命与影响因素之间的关联程度,通过自行设计组装直剪疲劳试验装置,借助UTM-100沥青路面万能试验材料机,在考虑不同复合结构类型、不同粘层油种类、不同加载频率、不同应力水平和温度作用下,开展不同复合层沥青混合料的层间抗剪切疲劳试验;基于灰熵理论模型探寻各影响因素与疲劳剪切寿命之间的关联程度.结果表明:SBS改性沥青粘结材料的抗剪切疲劳性能明显优于改性乳化沥青粘结材料,改性乳化沥青粘结材料又优于基质沥青粘结材料;应力水平从0.3提高到0.4时,沥青混合料的层间剪切疲劳破坏寿命均大约减少60%~65%;温度从20 ℃升到30 ℃时,沥青混合料层间剪切疲劳破坏寿命均大约减少45%~65%;沥青混合料层间抗剪切疲劳性能与其影响因素的关系程度为:加载频率＞应力水平＞温度＞粘层油种类.

关键词: 沥青混合料, 灰熵理论, 剪切疲劳, 层间, 影响因素

Abstract: To investigate the degree of correlation between the fatigue life of interlayer shear in asphalt pavement and the contributing factors, a shear fatigue test was assembled. A conprehensive series of interlayer shear fatigue tests of asphalt mixtures with different composite structure layers were carried out on the UTM-100 asphalt pavement universal test material machine. The shear fatigue test encompass different composite structural layer types, different viscous layer oil types, different loading frequencies, different stress levels and temperature effects. The degree of correlation between these influencing factors and the fatigue shear life are employed based on the grey entropy theory. The results show that the SBS-modified asphalt binder material exhibits markedly superior interlayer shear fatigue performance compared to modified emulsified asphalt binder material, with the latter outperforming base asphalt binder material. When the stress level was increased from 0.3 to 0.4, the interlayer shear fatigue life of the asphalt mixtures was all reduced by approximately 60% to 65%, and the interlayer shear fatigue life of asphalt mixtures was reduced by approximately 45% to 65% when the temperature was increased from 20°C to 30°C. The degree of relationship between the interlayer shear fatigue performance of asphalt mixture and its influencing factors ranks as follows: loading frequency > stress level > temperature > type of viscous layer oil.

Key words: asphalt mixture, gray entropy theory, shear fatigue, interlayer, influencing factors

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