多孔低噪路面沥青混合料承载疲劳预测仿真

Simulation of Bearing Fatigue Prediction for Asphalt Mixture of Porous Low-noise Pavement

采用已有方法预测沥青混合料的承载疲劳时,忽略了对沥青混合料已有损伤的分析,导致沥青混合料裂纹扩展角、裂纹深度和裂纹长度的预测结果不准确,应用有效性较差。现提出多孔低噪路面沥青混合料承载疲劳预测方法。设定多孔低噪路面的疲劳损伤参量,建立沥青混合料的疲劳损伤累积模型。分析荷载作用下多孔低噪路面沥青混合料产生的疲劳损伤,并以此为依据预测沥青混合料的承载疲劳。仿真结果表明,所提方法可精准的预测裂纹扩展角、裂纹深度和裂纹长度,实验结果验证了所提方法的整体应用有效性。

Currently,it is difficult to obtain accurate prediction results of crack growth angle,crack depth and crack length when the existing methods are used to predict the load fatigue of asphalt mixture due to ignoring the analysis of the damage of bituminous mixture.Therefore,a method to predict the load fatigue of bituminous mixture of porous and low-noise pavement was proposed.At first,relevant parameters of fatigue damage of porous and lownoise pavement were set up,and then a fatigue damage accumulation model of bituminous mixture was built.Moreover,the fatigue damage of bituminous mixture of porous and low-noise pavement under load was analyzed.On this basis,and the load fatigue can be predicted.Simulation results show that the proposed method can accurately predict the crack growth angle,crack depth and crack length;In addition,the result proves the availability of application.