江苏大学学报（自然科学版）2017，Vol.38Issue(6)：731-736,6.DOI:10.3969/j.issn.1671-7775.2017.06.019
基于断裂力学的沥青路面Top-Down开裂机理
Cracking mechanism of Top-Down cracking in asphalt pavements based on fracture mechanics
摘要
Abstract
Based on the three-dimensional finite element analysis in ABAQUS software,with considerations of the modulus gradient of asphalt pavement by aging and temperature gradient,the suddenly cooled down temperature and the concentration of tire edge stress,three seasons of spring,summer and winter and three conditions of slowing cool down before aging,slowing cool down after aging and sudden cooling down after aging were selected to establish nine finite element asphalt pavement models with cracks.The stress intensity factors of Top-Down cracking (TDC) under different working conditions were analyzed.Combining the theory of the maximum circumferential tensile stress,the cracking mechanism and the prediction method of TDC were given.The results show that the stress intensity factors of shear mode are the main cause for the propagation of cracks under the conditions of slowing cool down before aging and slowing cool down after aging.The stress intensity factors of opening mode are the main cause for the propagation of cracks under the condition of sudden cooling down after aging.关键词
沥青混凝土路面/Top-Down开裂机理/有限元法/模量梯度/应力强度因子Key words
asphalt concrete pavement/Top-Down cracking mechanism/finite element method/modulus gradient/stress intensity factor分类
交通工程引用本文复制引用
陈正伟,张洪亮,张珊珊..基于断裂力学的沥青路面Top-Down开裂机理[J].江苏大学学报（自然科学版）,2017,38(6):731-736,6.基金项目
浙江省交通运输厅公路局科技研究项目(2012H50) （2012H50）
