东南大学学报（英文版）2017，Vol.33Issue(3)：286-292,7.DOI:10.3969/j.issn.1003-7985.2017.03.006
基于DEM的沥青混凝土两点弯曲疲劳试验模拟分析
Simulation and analysis of two-point bending fatigue test of asphalt concrete based on discrete element model
摘要
Abstract
In order to investigate the fatigue performance of French high modulus asphalt concrete and the correlation between Burger's parameters and fatigue life, the virtual model of asphalt mixture trapezoidal specimen in the two-point bending fatigue test was constructed in discrement element software PFC3D. The initial stiffness and the maximum stress when the specimen reached fatigue were calculated. Through the comparison between virtual and single field fatigue test curves, the credibility of simulation in DEM was verified. Then, the impacts of top controlled displacement and Burger's parameters(E1,E2,η1,η2) on the fatigue life of the specimen were explored. The simulation results indicate that the maximum stress increases with the increase in the top controlled displacement. With the increase of E1and the decrease of E2in Burger's model, the modulus of the asphalt binder increases, and the fatigue performance of the asphalt mixture enhances. η1and η2have limited influence on fatigue life compared with E1and E2.关键词
高模量沥青混凝土/数值模拟/Burger's参数/疲劳寿命Key words
high modulus asphalt concrete/numerical simulation/Burger's parameters/fatigue life分类
交通工程引用本文复制引用
曹青青,刘修宇,汪浩,黄晓明..基于DEM的沥青混凝土两点弯曲疲劳试验模拟分析[J].东南大学学报（英文版）,2017,33(3):286-292,7.基金项目
The National Natural Science Foundation of China (No. 51378121). （No. 51378121）
