三类沥青路面结构力学响应的对比分析

Comparative analysis of mechanical response of three typical asphalt pavement structures

针对半刚性基层、柔性基层及复合式基层沥青路面的不同力学分布特征,以京津塘高速公路改扩建工程为依托,采用壳牌设计软件BISAR 3.0为计算工具,并用Mathlab 7.0软件将三类沥青路面结构、各主要力学响应量进行三维化处理,并对力学响应分布进行了比较分析。结果表明:从路面整体受力的角度看,复合式基层沥青路面的各项力学响应均介于柔性基层沥青路面及半刚性基层沥青路面之间;复合式基层沥青路面较柔性基层沥青路面及半刚性基层沥青路面有较大的力学优势。

Semi-rigid asphalt pavement, flexible base asphalt pavement and composite base asphalt pavement are the main structure forms of asphalt pavement at present. The mechanical distribu tion characteristics are different for different pavement structure forms. Based on the reconstruction project of Beijing--Tianjing--Tangshan expressway, this paper took the Shell Designing Software BISAR 3.0 as calculation tool to get the three-dimensional response results of the three kinds of asphalt pavement, the distributions of main mechanical response variables were compared with each other using the software of Mathlab 7.0. Then a comprehensive analysis was made on the basis of the mechanical response distributions of the three structures. The results show that the every mechanical response degree of composite base asphalt pavement is between the flexible base asphalt pavement and semi-rigid asphalt pavement. The composite base asphalt pavement is in a better mechanical condition compared to flexible base asphalt pavement and semi-rigid asphalt pavement. 8 tabs,16 figs,18 refs.