沥青路面剪切变形预估模型

Prediction Model of Shear Deformation of Asphalt Mixture Pavement

摘要:

将考虑温度影响的材料参数引入对路面剪切变形的机理和特征分析，利用轮辙试验和环道试验数据建立沥青路面剪切变形预估方程，并通过实地调查数据对该模型进行标定和验证.结果表明：同一深度上取多点最大剪应力的平均值作为该深度剪应力分析值可较为准确地反映沥青层的受剪状况；通过分析、拟合试验数据获得的包含剪应力分析值与抗剪强度之比、温度、速度和加载次数等参数的剪切变形预估方程形式合理，具有较为可靠的拟合和预估结果.

Abstract:

Dynamic modulus corresponding to effective temperature of permanent deformation was introduced to the calculation of the maximum shear stress and strain in the pavement. The shear deformation prediction model was developed by using the data of wheel rutting test and circular track test. The model was calibrated and verified by the field investigation data as well. The results indicate that the average maximum shear stress of three points at the same depth reflects the change of maximum shear stress in depth better. The shear deformation prediction model has the reasonable form, relatively reliable fitting and prediction results, involving maximum shear stress to shear strength ratio, temperature, loading speed and number.