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层间接触对半刚性沥青路面力学性能的影响

DOI: 10.3969/j.issn.1674-0696.2014.02.10, PP. 44-48

Keywords: 道路工程,沥青混凝土路面,连续模型,接触模型,数值模拟,roadengineering,asphaltpavement,continuousmodel,contactmodel,numericalsimulation

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Abstract:

:?基于典型的多层弹性层状体系,将沥青路面结构分为上面层、中面层、下面层、半刚性基层和土基层。考虑各结构层层间的接触,利用有限元软件Abaqus,建立了三维有限元接触模型,并与连续模型进行了对比分析。给出了两种不同有限元模型在车辆荷载下的路面弯沉值,沥青面层底面和半刚性基层底面的最大主应力,土基顶部的最小主应变,结构层中的最大剪应力等。结果表明:基于连续模型的半刚性路面厚度设计值偏小,导致在使用初期路面就容易出现各种损坏,而接触模型比较符合路面的实际工作状况,进行半刚性路面厚度设计时采用接触模型应该更加合理、准确。

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