基于性能的高模量沥青路面结构力学响应  

Structural Mechanics Response of High Modulus Asphalt Pavement Based on Performance

作　　者：张玲 耿娟 司飞展 ZHANG Ling;GENG Juan;SI Feizhan(Xi’an Zhongli Asphalt Co.,Ltd.,Xi’an 710075,China;Xi’an Highway Survey and Design Research Co.,Ltd.,Xi’an 710065,China;Xi’an Highway Engineering Management Office,Xi’an 710065,China)

机构地区：[1]西安众力沥青有限公司,西安710075 [2]西安公路勘察设计院有限公司,西安710065 [3]西安市公路工程管理处,西安710065

出　　处：《科技和产业》2023年第19期239-247,共9页Science Technology and Industry

基　　金：陕西省交通运输厅课题项目(20-46K)。

摘　　要：为探究高模量沥青混凝土长寿命沥青路面应用,研究了高模量沥青混合料的动态模量和抗剪强度。结果表明,高模量沥青混合料的强度具有较强时-温依赖性,抵抗变频加载能力较强;其内摩擦角比传统AC(沥青混凝土)沥青混合料小21%,黏聚力高3倍。采用有限元分析7种不同高模量沥青路面结构的力学响应,针对优选的4种路面结构分析厚度对路面力学响应的影响。进而利用车辙预估模型,以车辙深度为控制指标,预测高模量沥青路面的功能寿命。结果显示,不同力学指标对应的较优路面结构均为上中下面层、中下面层采用高模量沥青混合料的结构,其与传统AC结构相比可分别延长路面寿命326%和118%。In order to achieve long-life asphalt pavement and explore the application of high modulus asphalt concrete in long-life asphalt pavement,the dynamic modulus,shear and compressive strength of high modulus asphalt mixture were studied.The results indicate that the strength of high modulus asphalt mixture has a strong time-temperature dependence and strong resistance to variable frequency loading.In addition,the high-temperature shear resistance of high modulus asphalt mixture is better than that of traditional AC(asphalt concrete)asphalt mixture,with an internal friction angle 21%smaller than that of traditional AC asphalt mixture,but a cohesive force three times higher.The mechanical response of seven different high modulus asphalt pavement structures was analyzed using finite element method,and the influence of thickness on the mechanical response of the pavement was analyzed for the four selected pavement structures.Furthermore,the functional life of high modulus asphalt pavement was predicted by rutting prediction model,with rut depth as the control index.The results show that when the structure of high modulus asphalt mixture is used for all surface layers,middle and lower layers,all mechanical indicators reach equilibrium.Compared with traditional AC structures,it can extend the road life by 326%and 118%respectively.

关 键 词：高模量沥青路面 结构力学响应 功能寿命 动态模量 单轴贯入 车辙预估模型 

分 类 号：U416.2[交通运输工程—道路与铁道工程]