[1]张 倩,李 泽,温志广,等.冻融受荷协同作用下沥青混合料损伤模型研究[J].西安建筑科技大学学报:自然版,2016,48(02):188-194.[doi:10.15986/j.1006-7930.2016.02.007]
 ZHANG Qian,LI Ze,WEN Zhiguang,et al.Research on the damage model of asphalt mixture under synergy action of freeze-thaw and loading[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2016,48(02):188-194.[doi:10.15986/j.1006-7930.2016.02.007]
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冻融受荷协同作用下沥青混合料损伤模型研究
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西安建筑科技大学学报:自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
48
期数:
2016年02期
页码:
188-194
栏目:
出版日期:
2016-04-28

文章信息/Info

Title:
Research on the damage model of asphalt mixture under synergy action of freeze-thaw and loading
文章编号:
1006-7930(2016)02-0188-07
作者:
张 倩1李 泽1温志广2侯振华2
1. 西安建筑科技大学土木工程学院,陕西 西安 710055;2. 包头市公路局,内蒙古 包头 014030
Author(s):
ZHANG Qian1 LI Ze1 WEN Zhiguang2 HOU Zhenhua2
 1. School of Civil Engineering, Xiʹan Univ. of Arch. & Tech., Xiʹan 710055, China; 2. Baotou Highway Burea, Baotou 014030, China
关键词:
道路工程损伤模型随机损伤力学协同作用细观损伤本构关系
Keywords:
road engineering damage model stochastic damage mechanical synergy action microscopic damage constitutive relation
分类号:
U416.21
DOI:
10.15986/j.1006-7930.2016.02.007
文献标志码:
A
摘要:
为研究寒区沥青路面抗冻融性能,借助细观损伤力学与宏观统计随机损伤理论,提出冻融变量、荷载变量及协同效应等概念,构建了冻融与荷载共同作用下的沥青混合料损伤本构关系和损伤演化方程,揭示冻融循环次数、应变及油石比影响下的沥青混合料冻融受荷损伤劣化机理.研究表明:寒区沥青混合料力学性能受冻融变量、荷载变量及协同效应影响显著,在冻融受荷协同作用下总损伤劣化呈非线性加剧趋势,沿冻融和受荷两条途径的损伤率演化规律迥异.冻融循环次数和油石比对损伤变量影响较大,但冻融次数超过20 时,损伤变量和损伤率降幅均显著且趋于恒定.适当上浮最佳油石比,可有效改善寒区沥青混合料的抗冻融耐久性能.
Abstract:
Aimed at a study on the frost resistance of asphalt pavement in cold areas, three new conceptions are put forward, i.e. freeze-thaw variable, loading variable and the synergistic effect based on meso-damage mechanics and macroscopic statistical stochastic damage theory. The damage constitutive relation and damage evolution equation of asphalt mixture under coupling action of freeze-thaw and loading are established, and the damage degradation mechanism of freeze-thaw and loading asphalt mixture under the influence of freeze-thaw cycles, strain and bitumen aggregate ratio are revealed. It is shown that the mechanical properties of asphalt mixture in cold regions are greatly affected by freeze-thaw variable, loading variable and the coupling effects. The total damage of asphalt mixture presents obvious nonlinear characteristic under the coupling effect of freeze-thaw and loading. The damage evolution rate law along the way of freeze-thaw and loading is different. Freeze-thaw cycles and bitumen aggregate ratio have a
great impact on the damage variables, but the reduced amplitude of damage variables and damage rate is significant, and it tends to be constant after 20 cycles. It is an effective way to increase the optimum asphalt aggregate ratio for improving the durability of asphalt mixture coupling of freeze-thaw and loading in cold areas.

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备注/Memo

备注/Memo:
收稿日期:2015-08-18 修改稿日期:2016-04-07
基金项目:国家自然科学基金资助项目(51108374);浙江省交通运输厅科研计划资助项目(2015J19);内蒙古自治区交通运输科技资助项目(NJ-2014-23)
作者简介:张倩(1971-),女,副教授,主要从事道路工程领域的教学和科研工作.E-mail:zhzzqs@126.com
更新日期/Last Update: 2016-05-22