摘要
沥青混凝土路面局部支承劣化是引发其病害的主要因素之一。考虑路面基层与路基不同的劣化程度,本文通过支承材料力学参数折减实现面层下局部区域劣化,并采用FLAC3D软件开展数值模拟研究。研究结果表明,随着劣化程度的增大,沥青混凝土路面弯沉和弯拉应力逐步增大,路面弯沉最大值随劣化系数的增加呈幂函数递减;当劣化面积比大于1后,路面弯沉值随劣化面积比线性增加;路面弯沉值随劣化深度的发展可明显分为快速增加阶段与缓慢变化阶段,当超过临界深度后,支承劣化对路面弯沉影响已不明显。研究成果对提升沥青路面病害条件下运行安全具有一定的参考意义。
The local support deterioration of asphalt concrete pavement is one of the main factors causing its disease.Considering the different deterioration degree of pavement base and subgrade,the deterioration of support material is achieved by the reduction of the mechanical parameters.The numerical simulation is carried out by FLAC3D software.The results show that with the increase of deterioration degree,the deflection and tensile stress of asphalt concrete pavement increase gradually.Besides,the maximum deflection of asphalt concrete pavement decreases in a power function with the increase of deterioration coefficient.When the deterioration area ratio is greater than 1,the pavement deflection increases linearly with the deterioration area ratio.With the development of deterioration depth,pavement deflection value can be divided into rapid increase stage and slow change stage obviously.When the critical depth is exceeded,the influence of support deterioration on pavement deflection is not obvious.The research results have reference significance for improving the operation safety of asphalt pavement under the condition of disease.
作者
戴轩
曹一凡
李香香
李朝
马云祥
DAI Xuan;CAO Yifan;LI Xiangxiang;LI Zhao;MA Yunxiang(College of Transportation Science and Engineering,CAUC,Tianjin 300300,China;Urumqi International Airport Branch of Xinjiang Airport(Group)Co.,Ltd.,Urumqi 830054,China)
出处
《中国民航大学学报》
CAS
2023年第5期20-26,共7页
Journal of Civil Aviation University of China
基金
天津市自然科学基金项目(21JCQNJC00850)
中央高校基本科研业务费专项(3122022043)。
关键词
沥青混凝土路面
病害
强度劣化
数值模拟
asphalt concrete pavement
disease
strength deterioration
numerical simulation
