基于Abaqus分析的BRT站点沥青路面不同轴载应力响应研究

Research on Stress Response of Asphalt Pavement at BRT Stations under Different Axle Loads Based on Abaqus Analysis

摘要:

BRT站点路面结构组合优化的目的，是提供一种能承受预期车辆轴载作用并在预定设计年限内同所处外部环境相适应的路面结构组合设计。从提高BRT站点路面沥青混合料抗剪强度的角度出发，通过工程实例和文献调研，提出了SMA+AC路面、双层SMA路面、半柔性路面以及环氧沥青路面共4种抗车辙性能较高的路面结构组合方案，通过Abaqus有限元软件对不同轮压下4种路基段路面结构组合方案的应力响应情况进行分析，分析不同路面结构的沥青面层剪应力、沥青混合料层层底拉应变、下基层层底拉应力及路基顶压应变的变化趋势，从数值分析的角度，得出不同沥青面层组合方案在不同轴载时的敏感性和适应性。

Abstract:

The purpose of optimizing the pavement structure combination of BRT stations is to provide a pavement structure combination design that can withstand the expected vehicle axle load and adapt to the external environment within the predetermined design period. Starting from the perspective of improving the shear strength of asphalt mixture on BRT station pavement, through the engineering examples and literature research, four pavement structure combination schemes of SMA+AC pavement, double-layer SMA pavement, semi-flexible pavement and epoxy asphalt pavement with high anti-rutting performance are proposed. The stress response of the four pavement structure combination schemes under different wheel pressures is analyzed by using Abaqus finite element software. The changing trends of asphalt surface shear stress, asphalt mixture bottom tensile strain, lower base bottom tensile stress and subgrade top compressive strain of different pavement structures are analyzed. From the perspective of numerical analysis, the sensitivity and adaptability of different asphalt surface combination schemes under different axial loads are obtained.