隧道内半刚性基层沥青路面有限元模型建立研究

Research on the Establishment of Finite Element Model of Semi-Rigid Base Asphalt Pavement in Tunnel

为完成对半刚性基层沥青路面的数值模拟研究,文章建立了隧道半刚性基层沥青路面有限元模型,并将有限元计算结果与BISAR3.0的结果进行比较,验证了有限元模型的合理性。结果表明,在建立隧道半刚性基层沥青路面三维有限元模型时,路面宽W为3.5m时,计算结果最为准确;应用有限元模型计算路面结构响应和疲劳寿命时,要对半刚性基层预设贯通裂缝,同时推荐采用偏载模式进行车轮荷载加载。

In order to complete the numerical simulation of the semi-rigid base asphalt pavement,this paper establishes a finite element model of the semi-rigid base asphalt pavement,and compares the results between the finite element calculation and the BISAR 3.0 to prove the rationality of the model.The following conclusions are drawn:When the three-dimensional finite element model of the semi-rigid base asphalt pavement takes the pavement width W of 3.5 meters,the results are in good agreement.It is suggested that the semi-rigid base should be preseted the through cracks and the tunnel should be loaded in eccentric load mode,when calculating the structural response a nd fatigue life of the pavement through the finite element model.