沥青路面典型裂缝湿度场数值模拟

Numerical simulation of humidity field of typical cracks in asphalt pavement

为明确沥青路面典型裂缝萌生与发展时的湿度状态,进行了沥青路面表面裂缝和反射裂缝的湿度场模拟,明确了表面裂缝和反射裂缝处深度与水气浓度的变化规律。研究结果表明:本文建立的双正弦函数模型可以较好地描述大气相对湿度变化规律;表面裂缝处的水气浓度低于正常路面处的水气浓度,反射裂缝处的水气浓度高于正常路面处的水气浓度,可以作为实际湿度状态下裂缝的萌生与发展规律研究和沥青路面服役性能合理评价的理论依据。

In order to clarify the humidity status of the typical cracks in the asphalt pavement during the initiation and development,the humidity field simulation results of the top-down cracks and reflection cracks of the asphalt pavement was carried out,and the variation law of depth and water vapor concentration at top-down cracks and reflection cracks was clarified.The results show that the double sine function model established can better describe the change of relative humidity of atmosphere.The moisture concentration at the top-down cracks is lower than that of the normal pavement,and the moisture concentration at the reflection cracks is higher than that on the normal pavement.This result can be used as a theoretical basis for the research on the initiation and development of cracks under actual humidity and the rational evaluation of the service performance of asphalt pavements.