摘要
针对集料-沥青-集料三明治剪切试验新试验现象,即几乎等概率出现单、双波峰力-位移曲线,根据双波峰试验曲线构建第一波峰和第二波峰应力位移关系模型.基于第一波峰、第二波峰模型,建立黏附、黏聚联合作用下的单波峰应力位移模型.建立沥青集料界面黏附应力和黏聚应力失效能耗关系模型.基于能耗关系模型分析单波峰现象和双波峰现象剪切能量的联系.数值模拟结果表明,高斯函数的组合能很好地拟合三明治试件剪切试验的应力-位移曲线.在沥青-集料界面剪切失效过程中,黏附力和黏聚力相互作用,沥青-集料界面的随机滑移距离影响两种应力相互作用机制.
According to the new test phenomenon of aggregate-asphalt-aggregate sandwich shear test,i.e.single peak force-displacement curve and double peak force-displacement curve with almost equal probability,the stress-displacement relation model of the first peak and the second peak was constructed according to the double peak test curve.Based on the first peak model and the second peak model,a single peak stress displacement model under the combined action of adhesion and agglomeration was established,and a failure energy consumption relation model of asphalt aggregate interface adhesion stress and agglomeration stress was also established.Based on the energy consumption relation model,the relationship between shear energy of single peak phenomenon and double peak phenomenon was analyzed.The numerical simulation results show that the combination of Gaussian functions can well fit the stress-displacement curve of sandwich specimens in shear tests.In the shear failure process of asphalt-aggregate interface,adhesion force and cohesion force interact,and random slip distance of asphalt-aggregate interface affects the two stress interaction mechanisms.
作者
董满生
孙炜
李凌林
汪忠明
DONG Mangsheng;SUN Wei;LI Linglin;WANG Zhongming(School of Automotive and Traffic Engineering,HeFei University of Technology,HeFei 230009,China;College of Civil Engineering,HeFei University of Technology,HeFei 230009,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2019年第6期1046-1051,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金青年项目资助（51408173）
关键词
道路工程
沥青-集料
剪切能量
双波峰曲线
黏附应力
黏聚应力
road engineering
asphalt-aggregate
shear energy
double-peak curve
adhesive stress
cohesive stress
