高模量沥青混合料与应变计协调变形研究  

Coordinated Deformation of High-Modulus Asphalt Mixtures with Strain Gauges

作　　者：刘朝晖[1] 郭志豪 黄优[1,2] 李文博 LIU Zhaohui;GUO Zhihao;HUANG You;LI Wenbo(School of Transportation,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road&Traffic Safety of Ministry of Education,Changsha University of Science&Technology,Changsha,Hunan 400114,China)

机构地区：[1]长沙理工大学交通学院,湖南长沙410114 [2]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

出　　处：《中外公路》2025年第2期55-64,共10页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:52278437);湖南省自然科学基金资助项目(编号:2022JJ40479);湖南省交通运输厅科技创新计划项目(编号:202236);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资助项目(编号:kfj210401)。

摘　　要：为了改善内置应变传感器与沥青混合料的变形协调性,采用高模量细集料沥青混合料AC-5和常规沥青面层混合料AC-13作为基体材料成型试件,并内置电阻式应变传感器。结合DIC(数字图像相关法),开展单轴压缩、单轴拉伸、四点弯曲逐级加载试验;建立经假设检验验证的有限元模型,分析应变计埋设深度、荷载大小和荷载类型等在不同工况下高模量过渡材料对变形协调性的影响。结果表明:在多种类型荷载作用下,相比AC-13沥青混合料,AC-5高模量沥青混合料中的传感器实测应变数据更加接近DIC的实测数据,且测量误差更小、更稳定;试件在受压、受拉时会出现不同的测量偏差,高模量沥青混合料对偏差有一定的改善作用;在应变计埋深、荷载大小、荷载类型3种影响因素中,AC-5高模量沥青混合料表现出的与应变计协调变形性能相较于AC-13沥青混合料均有不同程度的提升。In order to improve the deformation coordination between the built-in strain sensors and asphalt mixtures,high-modulus fine aggregate asphalt mixture AC-5 and conventional asphalt surface mixture AC-13 were used as the base materials,and specimens were molded with built-in resistive strain sensors.Uniaxial compression,uniaxial tension,and four-point bending step-by-step loading tests were carried out in conjunction with digital image correlation(DIC).A finite element model verified by hypothesis testing was established to analyze the influence of high-modulus transition materials on deformation coordination under different working conditions such as burial depth of strain gauge,load size,and load type.The results show that under various types of loads,compared with that of the AC-13 asphalt mixture,the measured strain data of the sensors in the AC-5 high-modulus asphalt mixture is closer to the measured data of DIC,and the measurement error is smaller and more stable.The specimens will have different measurement deviations when subjected to compression and tension,and the high-modulus asphalt mixture has some improvement in the deviation.In terms of the three influencing factors including burial depth of strain gage,load size,load size,and load type,the AC-5 high-modulus asphalt mixture has different degrees of improvement on the coordinated deformation performance of the strain gage compared with the AC-13 asphalt mixture.

关 键 词：道路工程 应变计 高模量沥青混合料 协调变形 有限元分析 

分 类 号：U416[交通运输工程—道路与铁道工程]