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半刚性基层沥青路面车辙特性分析

, PP. 14-18

Keywords: 道路工程,车辙特性,有限元,沥青路面,车辙比例,沥青层厚度

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Abstract:

针对半刚性沥青路面的车辙特性,利用有限元软件ABAQUS模拟分析了连续变温温度场下不同路面结构车辙发展规律、沥青面层不同结构层的车辙比例及路面车辙与沥青层厚度的关系。结果表明路面车辙的发展规律与沥青混合料永久变形规律相似,同样表现出3阶段特性,同样并不存在严格意义上的等速阶段,只是在荷载作用次数的某一范围内,车辙发展速率基本保持恒定;不同结构组合的沥青路面车辙发展规律大致相同,即荷载作用初期车辙发展较快,随后车辙发展进入稳定增长阶段,但是荷载作用末期,车辙有可能加速发展,进入破坏阶段;中面层车辙所占比例远高于其他面层,应该重视提高中面层沥青混合料的抗车辙能力;对于半刚性沥青路面结构,路表车辙并非随厚度的增大成直线上升,其增幅随厚度的增大而逐渐变缓。

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