基于沥青混合料动态模量主曲线参数的沥青路面结构分析
Analysis of Asphalt Pavement Structure Based on Master Curve Parameters of Dynamic Modulus of Asphalt Mixture
刘朝晖 1杨鑫 2黄优 1柳力2
作者信息
- 1. 长沙理工大学 道路灾变防治及交通安全教育部工程研究中心,湖南 长沙 410114;长沙理工大学 交通运输工程学院,湖南 长沙 400114
- 2. 长沙理工大学 交通运输工程学院,湖南 长沙 400114
- 折叠
摘要
为研究沥青混合料动态模量主曲线参数变化以及交互作用对沥青路面结构响应的影响,采用有限元方法建立沥青路面结构三维模型,并开展半刚性基层和柔性基层沥青路面结构计算;以动态模量主曲线参数δ、α、β、γ为影响因素,以沥青层底最大拉应变、路基顶面竖向压应变为响应目标,采用响应面法(RSM)建立动态模量主曲线参数与沥青路面关键结构响应的响应面模型,分析主曲线参数及其交互作用对沥青路面结构关键响应的影响.结果表明:动态模量主曲线参数对结构关键响应的影响受响应类型和路面结构类型的共同影响,其中参数δ的影响最大,α次之,β、γ的影响相对较小.半刚性基层路面结构的沥青面层层底拉应变和路基竖向压应变不受参数间的交互作用影响,参数α和β的交互作用对柔性基层路面结构的路基竖向压应变影响显著.
Abstract
In order to study the effect of the change in the master curve parameters of the dynamic modulus of asphalt mixture and the interaction on the structural response of asphalt pavement,a three-dimensional model of the asphalt pavement structure was established using the finite element method,and the structural calculations of asphalt pavement with semi-rigid base and flexible base were carried out.The master curve parameters of the dynamic modulus δ,α,β,and γ were taken as the influencing factors,and the maximum tensile strain at the bottom of the asphalt layer and the vertical compressive strain at the top of the subgrade were set as the response targets.The response surface model of the master curve parameters of the dynamic modulus and the critical structural response of the asphalt pavement was established by the response surface method(RSM),and the influence of the master curve parameters and their interaction on the critical response of the asphalt pavement structure was analyzed.The results show that the effect of the master curve parameters of the dynamic modulus on the critical response of the structure is influenced by the type of response and the type of pavement structure,and the parameter δ has the greatest effect,followed by α.The effects of β and γ are relatively small.The tensile strain at the bottom of the asphalt layer and the vertical compressive strain of the subgrade of the pavement structure with a semi-rigid base are not affected by the interaction between parameters,and the interaction of parameters α and β has a significant effect on the vertical compressive strain of the subgrade of the pavement structure with a flexible base.
关键词
沥青路面/动态模量/响应面法/主曲线/有限元/力学响应Key words
asphalt pavement/dynamic modulus/response surface method/master curve/finite element/mechanical response引用本文复制引用
基金项目
国家重点研发计划(2021YFB2601000)
国家自然科学基金(52008044)
国家自然科学基金(52278437)
湖南省自然科学基金(2022JJ40479)
湖南省教育厅自然科学研究优秀青年项目(21B0296)
长沙理工大学道路灾变防治及交通安全教育部工程研究中心开放基金(kfj210401)
出版年
2024
国家科技期刊平台
NSTL
万方数据