摘要
为了研究不同温度下的层间黏结料的黏结强度,通过室内剪切试验建立了层间黏结料的强度~温度方程,引入层间黏结强度温度指数φ表征不同温度下的黏结状况。借助ABAQUS有限元分析软件,对不同黏结状态下半刚性基层沥青路面各结构层内应力进行了计算分析,研究了不同黏结状态对路面结构力学响应的影响。研究结果表明:温度较低时,层间黏结状态的变化对路面各结构层应力的影响并不明显;当温度高于35℃时(φ<0.6),面层结构最大拉应力σmax、最大剪应力τmax出现了非线性快速变化;温度变化对基层、底基层黏结性能影响不明显。研究成果对科学解释沥青路面在不同温度下黏结性能行为机理提供了有力依据,为改善层间黏结条件、提升路面整体性能提供了理论支撑。
In order to study the bond strength of interlaminar binder at different temperatures,the strength-temperature equation of interlaminar binder is established by indoor shear test,and the bond strength temperature indexφis introduced to characterize the bond status at different temperatures.With the help of Abaqus finite element analysis software,the stress in each structural layer of semi-rigid base asphalt pavement under different bonding states is calculated and analyzed,and the influence of different bonding states on the mechanical response of pavement structure is studied.The results show that when the temperature is lower,the change of interlaminar bond state has no obvious effect on the stress of each layer of pavement structure.When the temperature is higher than 35℃ (φ<0.6),the maximum tensile stress and maximum shear stress of surface structure change rapidly and nonlinearly.The effect of temperature change on the bonding performance of base and subbase is not obvious.The research results provide a strong basis for the scientific explanation of the bonding behavior mechanism of asphalt pavement at different temperatures,and provide a theoretical support for improving the interlayer bonding conditions and improving the overall performance of pavement.
作者
张乃计
吴国雄
ZHANG Nai-ji;WU Guo-xiong(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Jianzhu College,Chongqing 400074,China)
出处
《公路》
北大核心
2020年第7期14-19,共6页
Highway
基金
国家自然科学基金项目,项目编号51608085
重庆市教委科学技术项目,项目编号KJ1740469。
关键词
沥青路面
温度影响
层间黏结
力学响应
asphalt pavement
temperature effect
interlaminar binding
mechanical response
