基于熵权-TOPSIS的BRT沥青路面方案评价研究

Research on Evaluation of BRT Asphalt Pavement Scheme Based on Entropy Weight - TOPSIS

摘要:

在ABAQUS有限元软件分别对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组合结构应力、应变分析的结果基础上，以成都市BRT为例，同时增加沥青混合料的动稳定度和经济造价两个附加因素构建针对BRT路面评估的TOPSIS多目标评价方法，以沥青路面沥青混合料层层底拉应变、下基层层底拉应力、路基顶压应变、沥青混合料的动稳定度、单位造价5个指标实现对SMA+AC路面、双层SMA路面、半柔性路面以及环氧沥青路面4种路面结构组合方案进行评价，并获得BRT沥青路面结构推荐方案，可为BRT项目的沥青路面类型选择提供决策依据。

Abstract:

On the basis of using ABAQUS finite element software to analyze the stress and strain of four pavement composite structures with high anti-rutting performance, such as SMA+AC pavement, double-layer SMA pavement, semi-flexible pavement and epoxy asphalt pavement, taking Chengdu BRT as an example, a TOPSIS multi-objective evaluation method for BRT pavement evaluation is built by adding two additional factors of dynamic stability and economic cost of asphalt mixture. Five indexes of bottom tensile strain of asphalt mixture layer, bottom tensile stress of lower base layer, top compressive strain of roadbed, dynamic stability of asphalt mixture and unit cost of the asphalt pavement are used to evaluate four pavement structure composite schemes of SMA+AC pavement, double-layer SMA pavement, semi-flexible pavement and epoxy asphalt pavement. And the recommended schemes of BRT asphalt pavement structure is obtained, which can provide decision-making basis for the selection of asphalt pavement types in BRT projects.