基于数值分析法对沥青路面低温缩裂纹的研究  被引量:5

Study on Low Temperature Shrinkage Cracking of Asphalt Pavement Based on Numerical Analysis

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作  者:宋健民[1] 曾力[1] 白鹏飞[1] 

机构地区:[1]郑州大学土木工程学院,河南郑州450001

出  处:《公路工程》2016年第2期37-43,52,共8页Highway Engineering

摘  要:低温天气导致的沥青路面裂缝一直是困扰沥青路面使用性能的主要病害之一,这种低温裂纹的形成通常与路面纵向间距之间存在一定的关联系。采用数值分析法,通过构建路面温缩裂纹随纵向间距的有限元模型来分析具体参数对沥青路面裂纹形成的作用。研究表明:面层导热系数、面层模量增大,则起裂间距随之增大,更容易产生裂纹。而面层温缩系数增大,对应的理论理论起裂间距将减小,可有效抵抗稳温度变化对路面低温开裂的影响作用。based on the temperature result in the cracks of asphalt pavement in distress of asphalt pavement using performance of one of the main diseases,and the formation of the low temperature crack usually with road show a close relationship between the longitudinal spacing. In this paper,the numerical analysis method,through the construction of road surface temperature shrinkage crack with the longitudinal spacing between the finite element model to analyze the specific parameters on the effect of crack formation of asphalt pavement. Research shows that the surface coefficient of heat conductivity,surface layer modulus increases,the crack spacing increase,more prone to crack. And surface temperature shrinkage coefficient increases,the corresponding theoretical crack spacing will decrease,which can effectively resist the steady temperature change on the effect of pavement cracking in low temperature,and the change of poisson's ratio does not cause great influence for the pavement cracking in low temperature.

关 键 词:温度应力 数值分析 温缩裂缝 

分 类 号:U416.217[交通运输工程—道路与铁道工程]

 

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