[1]黎 晓,梁乃兴,白洪涛,等.排水沥青混合料疲劳损伤耗散能变化比[J].长安大学学报(自然科学版),2017,37(04):98-104.
　LI Xiao,LIANG Nai-xing,BAI Hong-tao,et al.Variation ratio of dissipated energy of fatigue failure for porous asphalt mixture[J].Journal of Chang’an University (Natural Science Edition),2017,37(04):98-104.
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排水沥青混合料疲劳损伤耗散能变化比()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第37卷
期数:
2017年04期
页码:
98-104
栏目:
出版日期:
2017-07-14

文章信息/Info

Title:
Variation ratio of dissipated energy of fatigue failure for porous asphalt mixture
作者:
黎 晓; 梁乃兴; 白洪涛; 程志豪; 赵小洁
1. 云南省交通规划设计研究院 陆地交通气象灾害防治技术国家工程实验室，云南 昆明 650041；2. 重庆交通大学 土木工程学院，重庆 400074；3. 云南省公路科学技术研究院，云南 昆明 650051
Author(s):
LI Xiao;  LIANG Nai-xing;  BAI Hong-tao;  CHENG Zhi-hao;  ZHAO Xiao-jie
1. National Engineering Laboratory for Surface Transportation Weather Impacts Prevention, Broadvision Engineering Consultants, Kunming 650041, Yunnan, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 3. Yunnan Research Institute of Highway Science and Technology, Kunming 650051, Yunnan, China
关键词:
道路工程; 排水沥青混合料; 应变控制; 耗散能变化比; 稳定值; 失效判定
Keywords:
road engineering;  porous asphalt mixture;  strain control;  variation ratio of dissipated energy;  plateau value;  failure criterion
分类号:
U416.217
文献标志码:
A
摘要:
为了给排水沥青路面的长期性能评价提供一定的研究基础，开展了高黏排水沥青混合料疲劳性能研究。在不同应变水平下对2种不同集料类型的高黏改性排水沥青混合料进行了四点弯曲小梁疲劳试验，采用劲度模量衰减以及能量法针对材料疲劳损伤过程进行分析；采用每一加载循环内材料耗散能变化比曲线跃变点进行材料疲劳损伤失效判定，并建立了包含耗散能变化比稳定值、材料组成体积参数等多因素在内的材料疲劳寿命预估模型。研究结果表明：应变控制模式下达到疲劳破坏标准时，高黏改性排水沥青混合料的劲度模量衰减仍处于平稳发展阶段，以此作为该材料疲劳失效判据并不恰当；传统累积耗散能与疲劳寿命存在良好的相关性，但低应变水平下稍有离散，且无法反映损伤过程的能量变化情况；而耗散能变化比曲线能够较为清晰地反映出材料在疲劳重复加载中的三阶段损伤过程，耗散能变化比稳定阶段表明整个损伤过程能量转化中材料自身损伤所需能量存在一固定比例，耗散能变化比稳定值表征了材料稳定的抵抗疲劳损伤的能力，并与材料疲劳寿命具有良好的幂函数关系，所建立的疲劳寿命预估模型能反映出材料疲劳损伤的本质；材料寿命预估模型拟合结果具有较高的拟合优度。
Abstract:
In order to provide the research basis for evaluation of long term performance of porous asphalt pavement, this paper studied the fatigue performance of porous asphalt mixtures with high viscosity modifier. Two kinds of aggregate types for porous asphalt mixture with high viscosity modifier were studied through four-point bending trabecula fatigue test under different strain levels, and the process of fatigue failure of mixture was analyzed based on the attenuation of stiffness modulus and dissipated energy method. The curve jump point of dissipated energy variation ratio at each cycle stage was employed to make the failure criterion for mixtures, and the fatigue life predication model was established, which including the parameters of the plateau value (PV) of variation ratio of dissipated energy and volume parameter of mixtures. The results show that the attenuation status of stiffness modulus of porous asphalt mixtures with high viscosity modifier still stays at stable stage when it failures under strain control mode, is inapplicable as the criterion for fatigue failure of this material. There is a good relativity between traditional accumulated dissipated energy and fatigue life shows a little dispersion, it can not demonstrate the energy variation in the damage process at low strain level. However, the variation curve of dissipated energy can clearly reflect the damage process of the three stages during repeated loading fatigue. The variation ratio of dissipated energy at stable stage reveals that the energy needed by the damage of material itself during energy transformation has a fixed ratio in the whole damage process. The plateau value of variation ratio PV demonstrates the capacity of materials against the fatigue failure, and has a good relation of power function with fatigue life. The established fatigue life prediction model can reflect the nature of fatigue failure of materials and its fitting result has a higher correlation coefficient.

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更新日期/Last Update: 2017-07-17