摘要
通过随机骨料投放程序,建立半刚性基层沥青路面细观模型,并通过Python语言编程嵌入内聚力单元,最后借助Abaqus有限元分析软件进行跨中、左偏中20 mm、右偏中20 mm的不同位置预切口以及左偏角30°、右偏角30°的不同方向预切口的沥青混合料三点弯曲试验的细观开裂数值模拟,分析得出了预切口位置、方向对裂缝扩展过程中的路径、耗散能、荷载-位移曲线等的影响规律,从而对半刚性基层沥青路面结构开裂机理的研究提供辅助手段.
Through the random aggregate placement program,a semi-rigid basement asphalt pavement mesoscopic model is built,and the cohesive force unit is embedded by programming in python language.Finally,ABAQUS finite element analysis software is used to perform different positions across the center,left center 20 mm,and right center 20mm and numerical simulation of meso-cracking in three-point bending test of pre-notch and pre-notched asphalt mixtures with different deflection angles of 30°left and 30°.The influences of the position and direction of the pre-notch on the path,dissipative energy,and load-displacement curve during the crack propagation are analyzed.Thus,the auxiliary means can be provided for the study on cracking mechanism of semi-rigid base asphalt pavement structure.
作者
林淦
滕旭秋
李斌斌
LIN Gan;TENG Xu-qiu;LI Bin-bin(LanzhouJiaotong University,School of Civil Engineering,Lanzhou 730070,China)
出处
《兰州工业学院学报》
2020年第2期50-55,共6页
Journal of Lanzhou Institute of Technology
关键词
半刚性基层
预切口
三点弯曲
细观开裂
Semi-rigid base layer
pre-cut
three-point bending
meso-cracking
