摘要
为量化二维与三维沥青路面有限元模型之间的差异,应用ABAQUS建立二维及三维模型,考虑单次静力荷载与动态荷载作用,研究刚性、半刚性和柔性3种典型沥青路面的位移及应力空间分布特性,结合双尾显著性检验,对比分析二维与三维建模方法对位移及应力的影响.结果表明,静力荷载作用下二维模型的位移是三维模型的15倍以上,动态荷载作用下二维模型的位移是三维模型的22倍以上;静力荷载作用下二维模型不同类型应力为三维模型的1.2~5.1倍,动态荷载作用下二维模型不同类型应力为三维模型的2.6~11.9倍.结合双尾显著性水平得到,静力荷载作用下横断面上垂直应力和切应力无显著性差异,可将三维路面结构简化为二维平面.
In order to quantify the differences between the two dimensional( 2D) and the three dimensional( 3D)finite element models of asphalt pavement,we establish the two kinds of models based on the finite element method under the consideration of the single static load and dynamic load. The displacement and stress spatial distribution characteristics of three kinds of typical asphalt pavement including the rigid pavement,the semi-rigid pavement andthe flexible pavement,are analyzed. The numerical results of 2D modelling and 3D modelling on the displacement and stress are compared by combining the double tail significance test. The results show that the displacement of 2D model is over 15 times more than that of 3D model under static load,and it is 22 times more than that of 3 D model under dynamic load. The stress of 2D model is 1. 2 ~ 5. 1 times of the stress of 3D model under static load and 2. 6 ~ 11. 9 times under the dynamic load. There is no significant difference between vertical stress and shear stress on the cross section under static load combined with the double tail significance level,and at this time the threedimensional pavement structure can be simplified to two-dimensional plane.
出处
《深圳大学学报(理工版)》
EI
CAS
CSCD
北大核心
2018年第1期39-47,共9页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(51508064
51408083)
重庆市前沿与应用基础研究计划资助项目(cstc2014jcyj A30018
cstc2016jcyj A0128)
广西科技计划资助项目(2013-100-28)
交通土建工程材料国家地方联合工程实验室开放基金资助项目(LHSYS-2016-01)~~
关键词
道路工程
沥青路面
二维模型
三维模型
力学响应
有限元法
road engineering
asphalt pavement
two dimensional model
three dimensional model
mechanical response
finite element method